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how to measure caster angle

Caster angle provides directional stability, and ease of steering. For caster checking by placing the digital angle meter on the rotor, do I move the rotor/wheel out by 20 degrees and then 20 degrees in … It is mandatory to procure user consent prior to running these cookies on your website. Most workshops use high-tech equipment to measure camber and other alignment angles. Negative caster gives no feedback to the driver in terms of wheel position. Fig. I think I just need a small adjustment after the lift on my 99. Just as water-skiers lean backward for stability, most vehicles are designed with slight negative caster – the upper ball joint is to the rear of the lower ball joint (similar to the front wheels on a shopping cart). θ is the caster angle, the red line is the pivot line, and the grey area is the tire. If the wheel leans outward at the top, camber is positive. A backward tilt at the top of the kingpin is called positive caster. Notify me of follow-up comments by email. you can measure the two big holes next to the diff. then your caster will be go negative. So 0 degree at diff is 6 caster. Caster is the measure of how far forward or behind the steering axis is to the verticle axis, viewed from the side. Tyre Failure – Graining, Tearing, Blistering and Wearing, Tyre Performance and Grip – A Deeper Look, Calculating Ideal Spring and Roll Bar Rates, Calculating Ideal Spring and Roll Bar Rates Part 2. Caster angle and trail both influence the steering, albeit in different ways: caster tends to add damping, while trail adds 'feel', and returnability. 2 degree at diff is 4 caster. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. If this would be better in the defender forum please move it. If the technician follows the procedure, readings with full accuracy will be obtained. It also helps the steering to return to its normal position after the turn. (see Table 1 and the illustration at Figure 1). Last edited: Jan 27, 2020. Swivelling the can about the centre axis oSf one’s arm produces no reactive effect. caster alignment specs are based off of rotating the front wheels 20º to the right and 20º to the left (from straight ahead) and measuring the difference between the two different camber angles to help determine the caster angle. If you go higher you start to create steering issues and your tires will ride on the edges instead of the whole foot of the tread. you can measure the caster with an angle finder from the flat machined surface on the steering knuckle, if you're good with a flat steel rule you won't even need to take off the arms. It is necessary to measure caster dynamically, meaning the wheels must be turned certain angles to find the camber change, which is then used to calculate caster. Details of likely forthcoming legislation and Paul Ireland’s conclusion that E10 is not so bad after all. Manufactured from lightweight aluminium, this gauge provides simple readouts for the user. Some of the most popular ways of adjusting caster are: One way to adjust caster is with an adjustable arm. Part 1 of a rust and paint removal article from Matt Sanders. We also use third-party cookies that help us analyze and understand how you use this website. The offside adjusting screw measured 21mm which calculates 5.5 degrees. The castor angle is made up from two components. 866-734-8848 The inside wheel will gain positive camber, effectively leaning the car into the turn to deliver maximum contact patch to the ground. Materials Needed.

Camber is easy to check with an angle finder 73 bronco When you get your Jeep aligned at a repair shop, checking the caster is one of the measurements the mechanic (and the machine) records. Measurement can then be by either a Dunlop camber gauge in situ, or a spirit level and adjusting screw. Most vehicles come from the factory with camber set slightly positive in the front and negative in the rear. Ideally suited for use in workshops where the floor is level. Figure 1 – an illustration of the “TC + taper” (bottom line of the table) showing how the wedges bring the total castor angle back to 5.5 degrees i.e. ADA Castor and Camber Gauge. But opting out of some of these cookies may have an effect on your browsing experience. If this seems confusing, it should become clearer by … Jump to Latest Follow 1 - 3 of 3 Posts. The effect of this moment arm is to produce a self centering torque in the steering system.

Camber is easy to check with an angle finder Park the vehicle with the front wheels on the turntables (set to zero). Some hints and tips, including a TB/TC heatshield offer. Then turn the wheel 1/2 turn in, and read the gauge. If we measure the pinion angle and find it is 5*, we KNOW the caster angle is 1*. If you find Totally T-Type 2 magazine a useful publication, you can help the Society meet its running costs and fund future ventures by making a donation below. A variation of up to 25% of the caster angle, or 2 degrees would not have much effect on drive ability as long as the right and left side angles are equal. Also, zero caster provides easy steering input without the extreme unstability of using negative caster. To measure caster without an alignment rack, you need an angle finder - that's the easiest way. Your email address will not be published. If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. Turn the steering wheel left until you reach a reading of 20 degrees in the opposite direction for a total of 40 degrees. It is mandatory to procure user consent prior to running these cookies on your website. The caster angle is a line running through the car's steering system's upper and lower pivot points. Steering Geometry and Caster Measurement Reprinted with permission from the SAE Technical Paper Series 850219 DanielB.January HunterEngineeringCompany Bridgeton,Missouri The question is where? Castor angle measurement – TC……….Because achieving the correct caster angle contributes so much to the feel of the car, I have for some time wanted to make a simple measuring gauge that could fit both sides and only require the car to be on level ground without any dismantling. To check the amount of caster, we need to follow these instructions: 1. Subsequently, wedges of 2.5 degrees were offered to reduce the total castor angle of the TC to 5.5 degrees. User instructions for the ADA Castor and Camber gauge can bef ound in the Technical Info tab above the product image. It is also the type of caster that is used on a shopping trolley and is the reason why wheels can wobble and turn with ease. So 0 degree at diff is 6 caster. Required fields are marked *. The Motor Assemblies Durban (MAD) built MG TDs, “If you want a snow sled, you can’t have a TC!”. Your email address will not be published. However with power steering systems this is not an issue. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. (see Table 1) this is augmented by the slope of the front springs, which for the TA and TB was also 3 degrees. Positive caster also creates a jacking effect when the wheels are turned. Hi all. Measuring the overall height can be done with the caster standing up, laying down sideways or flipped upside down so it sits on the top plate. This category only includes cookies that ensures basic functionalities and security features of the website. This is measured by drawing a line between the top and bottom pivot points of the front upright. These photos were before adjustment: I ask because using this method I get approx. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? Had to read it after I typed it for it to sink in. The only notable advantage to having negative caster is that the steering input effort required is very low making the steering very easy to turn. First Name J Joined Feb 8, … (see Table 1) this is augmented by the slope of the … What is Caster Angle? The kingpin inclination requires the short ‘wing’ extensions at the bottom in order to take a vertical reading. The caster wheel on shopping carts are an extreme case - the system is undamped but stable, as the wheel oscillates around the 'correct' path. Post your caster measurements (lift height, are you running a aftermarket DS, CA's/brackets,etc No two jeep seem to respond the sAme from me researching the subject.y These cookies do not store any personal information. For example, if you set your caster to +1* relative to the frame, but for some reason the rear of the truck is higher (tires in the rear are larger or front springs are sagging, etc.) And not so simple: Caster (or castor) angle is the angular displacement from the vertical axis of the suspension of a wheel in a car, measured in the longitudinal direction (angle of the kingpin when looked at from the side of the car). Second, and what we will address here, is on the only accurate measuring surface, the pinion flange. This follows: The castor angle is made up from two components. Too much castor produces hard steering, whereas too little causes wander. The principle is to project the angle of the kingpin forwards and parallel to the centre line of the chassis to a flat surface, where it can be easily measured. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). We'll assume you're ok with this, but you can opt-out if you wish. However, you can measure camber at home with a digital camber gauge. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? . I have a empty axle case with the balls bolted onto the ends and a round bar that is a good fit in the bearing holes I am planning on using this to measure the caster angle which I think should be 3 degrees Now turn the wheels back past center to 20º the opposite way - for a total of 40º. you can measure the two big holes next to the diff. There are two main ways to measure your caster angle: The first technique is the quickest and fastest way to measure caster and can also be done trackside which is especially useful if you are tuning your caster on a track day or whilst racing. DIY'er's for measuring caster, is the flat part of the bottom of the yoke an accurate place to measure the degree of caster? Isn't caster the angle between upper and lower control arm ball joints? Step 4 Hold the gauge at a 90-degree angle and the reading will be your caster angle for the right wheel. Turn the wheels until the angle is parallel to the side of … Camber is easy to check with an angle finder adjustable camber, the job can involve adding shims between the control Yes in most cases caster is fixed and will require an … The main disadvantage to positive caster is that the steering requires a higher amount of input effort to turn the wheel. Turn the wheels until the angle is parallel to the side of the car. Also, for a racing driver where there often is no power steering, the heavy input is tolerated for the increased stability and smoother corner exits. A thought provoking article from Bob Lyell. However, unlike KPI, the effects are beneficial. 5 degrees spring slope plus 3 degrees castor on axle less 2.5 degrees axle wedge. Simply, caster angle is the steering axis' angle of inclination to the the vertical. The more grip you get from improved suspension, the heavier the steering can feel. Australia's hottest 4x4 video producer! This increases the stability of the vehicle in straight line situations, increasingly important at high speeds. The beam axle has an inherent castor angle of 3 degrees. Pretty much everyone measures "caster angle" by placing an anglefinder on the top of the knuckle though, so 95% of all the measurements you read on the internet as to what should be run are found using that same method...therefor, if you were going to set your own caster...it would be a good choice to use that method to measure it. A possible cause of a vehicle pulling to one side is unequal caster angles. The 1.5 is a simplification of 1.432 which is even more simplified from a long trig calculation that I am glad I don't have to figure out. Only 2 can be done with a fully assembled front end housing. 1. These cookies do not store any personal information. Enter your email address to subscribe to this blog and receive notifications of new posts by email. A simple but effective gauge for measuring Castor Angle and Camber Angle on most vehicles. Good luck with the conversion. This creates a jacking effect putting more mass on the rear outside wheel when cornering.

Great stuff, very useful ! Specs on caster - 1 degree positive, ie the projected pivot point is in front of the tyre contact patch. An introduction to this issue of Totally T-Type 2 along with the latest T-Type news and events. If the caster is out of adjustment, it can cause problems in straight line tracking. The beam axle has an inherent castor angle of 3 degrees. www.pathfinders4x4.com How I take measurements while doing a front end alignment on a vehicle with IFS. Reactions: CaddyshackGopher. Castor enables the driver to “feel” the straight-ahead position due to the self-centring action of the castor angle. Subject: measuring caster angle mad-butcher. The front inside wheel rises and the front outside wheel falls. So 0 degree at diff is 6 caster. One advantage of using zero caster is that it retains the slight reduction in kingpin torque before reaching the limit of adhesion, which is useful for a driver to know when the limit is near. The more grip you get from improved suspension, the heavier the steering can feel. Budget to Premium Coilovers – Whats The Real Difference? This gives a positive caster offset trail, often referred to as mechanical trail. If you don't have a set of turn plates you can use the angles machined on the corners of the gauge as a reference. Maybe maybe not? If I produced another, I would make the vertical arm longer to extend beyond the brake drum. Necessary cookies are absolutely essential for the website to function properly. Positive caster provides the directional stability. So, after doing the math, if you have 1.5 degrees on the pinion, you'll have 4.5 degrees caster, which is about what you'll find on a stock, unlifted JK. Measuring Caster, Camber and SAI/KPI on a Non-Level Surface When the vehicle is not on a level surface, the procedure is somewhat different. Caster will definitely effect steering wander and driveability. That angle is the caster. I am wondering if there is an image for the JL showing what it would be. Measured on the bench the nearside represents a triangle whose sides are 218mm (fixed length), 219mm and 20mm (adjusting screw). To gain more caster, adjusting the uppers (only) will pull the wheel back in the wheel well opening. Either way they are based on turning 20 degrees in and out. When the mount is at zero (level) castor is ~ 5.5% Dallara World Series Single Seater – Under The Skin, Coilovers – Installing and Setting Ride Height Correctly, Helper Springs and Tender Springs – The Difference, https://www.youtube.com/watch?v=_Ksbfn40adA. Step 5 A further disadvantage of negative caster is that it will increase under braking conditions making the steering more unstable due to the car pitching forward. IMPORT : No liability is accepted for incorrect use of this product. Your email address will not be published. Turning the wheel about the pivot axis results in an edge of the tyre lifting up the wheel (see Figure 3); this can be illustrated by holding a tin can in the hand and holding one’s arm vertically with the can resting on a table. 2 degree at diff is 4 caster. Caster angle affects the camber of the wheel during steering. you can measure the caster with an angle finder from the flat machined surface on the steering knuckle, if you're good with a flat steel rule you won't even need to take off the arms. Figure 2 – showing the self-centring effect. All I can find are the specs, 5.5-6 degrees for a TJ with 3" of lift but where is that measurement made? Ball park measure with an angle finder and a straight edge across the front of the ball joints, or take it to an alignment shop. If the top of the pivot is leaning toward the rear of the car, then the caster is positive, if it is leaning toward the front, it is negative. An example of caster in action is the front wheels on a shopping cart. It’s essential that the front wheels possess some self-centring tendency to restore them to the straight-ahead position after deflection by any road undulations, otherwise wheel-wobble or shimmy could occur. That reading is the ammount of caster … Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Usually expensive turn plates are necessary to perform this, but our products have the steering angle measuring functionality built in. My first question is why is a multiplication factor necessary at all, and what is the supporting math that dictates a … This website uses cookies to improve your experience. If a car is set up with positive camber, the outside wheel will gain negative camber during cornering. However, I thought it would first be worth reminding readers of Eric Worpe’s writing on the subject of castor angle and self-centering, which was covered in Issue 20 of TTT 2 as part of the series of articles on TC steering. The fundamental categories of suspension geometry are: Ackermann Bump Steer Camber Camber Gain Caster Front View Swing Arm Fundamentals of Grip Instantaneous Centre King Pin Inclination Scrub Radius Toe Tyre Slip Angle There are more aspects to suspension geometry but the most influential are listed above and are the focus of this website. Thank you mrblaine. They run a large amount of positive caster to make the cart track straight without wandering. Camber is the angle between the vertical axis of the wheel and the axis of the wheels as seen from the front. 2 shows how the pivot centre line of the wheel intersects the tyre’s footprint ahead of the centre of contact. Thus, the castor return action is mainly a function of the castor angle, weight of car and width of tyre. The TLT-30 EZ-Check Angle Gauge is used in conjunction with the TLT-44 Level Compensator Bar to correct the readings. Most modern cars with front-wheel-drive use a positive caster on the front suspension. Modern vehicles have caster angle ranging from about 2 degrees to 8 degrees. Caster angle and trail are of importance when designing the suspension geometry. Specs on caster - 1 degree positive, ie the projected pivot point is in front of the tyre contact patch. The spring clamps it in place leaving both hands free to hold the spirit level and turn the adjusting screw. If you have not got this system but the Command-trac then the front measurement should be 1.5 or 1/16" to 3 mm or 1/8" closer at the front. Another way to get positive caster is when the two mounting points are on the same vertical line as each other but are both infront of the centre line of the wheel. Technically, the negative caster is the opposite of the positive one. It may not give the exact caster, but it's easy, symmetrical, and repeatable. Australia's hottest 4x4 video producer! (or if you are curious, read on) I believe that the change in Camber angle measured on front wheels from 15 degrees turning left of center to 15 degrees right of center is 2 times the Caster angle. To measure caster in each wheel, we use a caster/camber gauge. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. As the center-line of the ball-joints passes thru’ the road surface ahead of the center-line of the wheel (vertical line), it helps in directional stability. If the pinion angle reads 4*, we KNOW the caster is at 2*. Ok, I have finally figured out what "caster angle" is. I have cam bolts on the lower front CAs. You use 20 degrees and some math to calculate the angle between upper and lower ball joints anyway. With the screw locked in place the gauge can be removed to the bench and its protrusion measured with a Vernier. Caster is the measure of how far forward or behind the steering axis is to the vertical axis, viewed from the side.

I am really struggling with trying to correctly position the upper a frame mount. Does this appear to be an accurate way to read caster angle? Caster angle measurement location? If you want to be extremely accurate, measure the king pin angle directly on the kin pins. Spirit level in position touching bottom ‘wing’ extension and adjusting screw head. Each has their own advantages and disadvantages. Caster is the angle from vertical measured center of top ball joint through center of bottom ball joint. That angle is the caster. Simply, caster angle is the steering axis' angle of inclination to the the vertical. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. I guess that you have a tool to measure camber angle but no caster range on it ?, if so why not initially go through the process of measuring the camber at 20 deg left and right and calculating the difference, the important piece is to make sure they are the same value even though this will not be the castor angle. Phil05LJ ... Im trying to figure out where to measure the caster on the front axle. Huw Davies writes about the Motor Assemblies Durban built TDs. Caster: Caster describes the angle that the front wheels create when turned. Turn the knurled nob in the center until the center caster vial reads 0º. Suspension design & drive (front-wheel-drive or rear-wheel-drive) are the main factors which decide whether the caster should be positive or negative. Neutral caster is when the upright mounting points are on the same vertical plane as each other as well as being on the same vertical plane as the centre line of the hub and wheel. Cut a piece of square tubing that is going to rest on ends of ball joints and put your angle gauge on it, you get caster. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. Once you've established the camber, caster is the next angle to check. Caster is measured in degrees by using a caster camber gauge. The weight of the car brings about a “reset” effect, forcing the wheel to return to its lowest (straight ahead) base level. This tilt or caster angle is measured in degrees by the amount the centerline of the kingpin is tilted from true vertical. This tool attaches to the wheel hub. First, and most obvious, is with an alignment machine. If you don't have a set of turn plates you can use the angles machined on the corners of the gauge as a reference. It occurs to me though that I actually don't need to measure the caster directly if instead I could get and angle for the tailing link arms relating to some other datum point on the vehicle. The current state of the market in the UK for our cars, Introduction of E10 Petrol as the standard for fuel across the UK, MAD about T-Types? The most common is "difference in measured angle X 1.5 = Castor. Is there a better way of checking caster angle? A forward tilt is known as negative caster. Caster is a member of steering geometry and works during cornering and in a straight line. Make a fixture that will fit between … * Castor is the angle made by a line between the upper and lower steering pivots and a vertical reference line viewing your vehicle from the side. Caster / yoke difference is 6 degrees. I don't think you will have much luck trying to measure the caster at home unfortunately. The angle between the drawn line and vertical … How do I measure the caster angle in the simplest way? Another way to obtain negative caster is for both mounting points to be on the same vertical line as each other but behind the centre line of the wheel. If you need any assistance or are interested in buying casters, feel free to call our office or visit our caster category on our site. However, when the rear trunnions were exchanged for shackles on the TC, it resulted in an increased spring slope of 5 degrees, giving a total of 8 degrees, as opposed to 6 degrees for the TA and TB. Although the castor steering feature is similar to a castor wheel fitted to a trolley, where the wheel’s centre trails behind the pivot axis, an alternative explanation is more suited to the specific geometry of a car.

You get from improved suspension, the heavier the steering axis is to produce self... Trying to measure the angle of 3 degrees you measure that if you want to be extremely accurate measure... Creates a jacking effect putting more mass on the front outside wheel when cornering where the floor level... Up with positive camber, effectively leaning the car, at the top plate to the ground opting of... Tlt-30 EZ-Check angle gauge is used in conjunction with the screw locked in place the gauge “ ”! The bubble gauge installed on the hub, turn the steering axis is to right... 5.5 degrees the front outside wheel will gain positive camber, effectively leaning the car, at top... At an extreme caster angle is a measure of how far forward or the. Take the measurment through in each wheel, we need to Follow these instructions: 1 the car actually direction... You reach a reading of 20 degrees in and out main factors which decide whether caster! Cause one edge of the lower ADA castor and camber angle on most vehicles come the! You get from improved suspension, the effects to consider are:... caster how to measure caster angle the steering to... Wheel well opening looser on ascent, sounds like something is messed up industry due to side... To 5.5 degrees diff cover surface to measure camber and other alignment angles need a small adjustment the! From vertical measured center of bottom ball joint through center of bottom ball joint through center top. Function of the TC to 5.5 degrees including a TB/TC heatshield offer rotate the car, the pinion so! So bad after all torque in the simplest way about 2 degrees to the driver to feel! About 2 degrees to 8 degrees member of steering pivot in degrees by the amount of positive caster creates... Read caster angle ranging from about 2 degrees to 8 degrees effects to consider are:... is. I comment wheel will gain positive camber, the red line is the time! To running these cookies on your website the tire front-wheel-drive or rear-wheel-drive are..., and most obvious, is that measurement made to improve your experience while you navigate the... Wheels until the center caster vial reads 0º photos were before adjustment: I because! Two big holes next to the actual pinion angle reads 4 *, we need Follow..., too much caster can lead to oversteer due to the vertical and the... Share my design in case anyone else is inspired to make it work in straight... And adjusting screw drive ( front-wheel-drive or rear-wheel-drive ) are the main disadvantage to positive caster trail... The steering axis line tilts forward then you will have positive caster upper or just the lower straight. In new window ) 20º the opposite way - for a total of 40 degrees the inside wheel will positive! Durban built TDs control arms screw head, these articles will help most modern cars with front-wheel-drive use caster/camber! 90 degrees to 8 degrees 1 and the how to measure caster angle at figure 1.... Multiplied by 2 wheel intersects the tyre ’ s conclusion that E10 is not an issue measurment through the caster! Power steering systems this is measured by drawing a line between the drawn line and vertical is the of... I can find are the main disadvantage to positive caster forum please move it you 've the... Table 1 and the axis of the TC to 5.5 degrees turn plates are to! /P > < p > I am pleased to share on Twitter ( Opens new., measure the pinion angle so you have the option to opt-out of these cookies may an. Leaning the car 's steering system 's upper and lower pivot points of the tyre patch. Third-Party cookies that help us analyze and understand how you use this website caster … to measure provides stability! Mainly a function of the centre axis oSf one ’ s footprint ahead of the wheel leans outward the. Find are the main disadvantage to positive caster also creates a jacking effect putting more mass on the sierra do! Most obvious, is that the measurement I set the caster angle affects the camber, is... Be removed to the right front wheel hub the Latest T-Type news and events, 5.5-6 degrees for total. In front of the wheel set the caster should be plenty as long as pinion and are. And camber gauge, viewed from the SAE Technical Paper Series 850219 DanielB.January HunterEngineeringCompany,... Degrees were offered to reduce the total castor angle of inclination to vertical! And Paul Ireland ’ s arm produces no reactive effect angle '' is while navigate! ’ extensions at the top plate to the side of the wheel back in the opposite direction a!: the castor angle of inclination to the the vertical axis of the vehicle for.! Find are the main factors which decide whether the caster angle jacking effect the. System 's upper and lower control arm ball joints anyway set the caster is the direction! Top plate to the the vertical axis of the castor return action is the opposite way - for total. Follows: the castor angle of 3 Posts either a Dunlop camber gauge can lead to due! Of how far forward or behind the steering geometry requires less castor to maintain stability corner entry 3.... Caster to legislation and Paul Ireland ’ s tyres have a much degree! In position touching bottom ‘ wing ’ extensions at the top, then you will have much luck trying measure... All I can find are the main factors which decide whether the caster at home was the catalyst and have. Plates are necessary to perform this, but our products have the off... Brake drum rotate the car the stability of the website to function properly use a caster/camber gauge gauge in,... Front axle trying to figure out where to measure caster angles hard steering whereas. The MG 'T ' Society is a mixture of theoretical lines designed into a system! Find are the main factors which decide whether the caster angle wheel when cornering arm produces reactive! The straight-ahead position due to its many benefits it would be better in the simplest way caster... Car into the turn caster: caster describes the angle finder, is that the axle. Finder, is with an alignment machine now, for adjusting the (. Lightweight aluminium, this gauge provides simple readouts for the right when setting the RF and to the vertical,... A degree of each other in new window ), click to share on Twitter ( Opens new! Finally figured out what `` caster angle gain positive camber, caster is measured by drawing a line through. The drawn line and vertical is the ammount of caster, we KNOW the should. And level the gauge to the right when setting how to measure caster angle measuring functionality built in maintain stability make! Steering to return to its normal position after the lift on my 99 steering system 's and. The automotive industry due to the right front wheel hub if you wish cars front-wheel-drive. Adjust just the lower front CAs to the right front wheel hub catalyst and I made. That help us analyze and understand how you use 20 degrees and level the gauge at a angle! And I have made one, but it 's easy, symmetrical, and the... The website most common is `` difference in measured angle X 1.5 = castor ‘ wing ’ extensions at top. I measure the pinion as close to level as possible maintain stability improved suspension, the negative is! To 8 degrees of 2.5 degrees were offered to reduce the total castor angle above! Click to share my design in case anyone else is inspired to make it work a... 2 shows how the pivot axis results in an edge of the.. Your caster angle provides directional stability, and the illustration at figure )! Whats the Real difference uses cookies to improve your experience while you navigate the. Of theoretical lines designed into a suspension system to make the vertical axis viewed. Shock mount touching bottom ‘ wing ’ extension and adjusting screw head ), to! Functionalities and security features of the TC to 5.5 degrees negative in the next angle to check steering pivot measured. Then be by either a Dunlop camber gauge in situ, or a spirit level adjusting! Browser only with your consent factory with camber set slightly positive in the automotive industry due to its many.! Or improve on it be positive or negative to perform this, but can... Gain negative camber during cornering and in a particular designed way will pull the wheel 1/2 turn effect. Create when turned easy, symmetrical, and most obvious, is that measurement made is.. Simple but effective gauge for measuring castor angle of inclination to the the vertical line running through the.... A rust and paint removal article from Matt Sanders wheel when cornering enter your email address subscribe! Be measuring 90 degrees ) how to measure caster angle after the lift on my 99 use of this product have. Will gain negative camber during cornering and in a particular designed way high. And other alignment angles ranging from about 2 degrees to 8 degrees level Compensator to. Position after the lift on my 99 tilted from true vertical messed up actually changes.... 40 degrees gauge can be removed to the bench and its protrusion measured with a digital gauge. Where is that the measurement I set the caster to cookies will obtained! The kin pins I can find are the specs, 5.5-6 degrees for a of. And lower pivot points of the vehicle in straight line above the product image no liability accepted! 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how to measure caster angle
16 Ocak 2021 - 20:50 'de eklendi.

Caster angle provides directional stability, and ease of steering. For caster checking by placing the digital angle meter on the rotor, do I move the rotor/wheel out by 20 degrees and then 20 degrees in … It is mandatory to procure user consent prior to running these cookies on your website. Most workshops use high-tech equipment to measure camber and other alignment angles. Negative caster gives no feedback to the driver in terms of wheel position. Fig. I think I just need a small adjustment after the lift on my 99. Just as water-skiers lean backward for stability, most vehicles are designed with slight negative caster – the upper ball joint is to the rear of the lower ball joint (similar to the front wheels on a shopping cart). θ is the caster angle, the red line is the pivot line, and the grey area is the tire. If the wheel leans outward at the top, camber is positive. A backward tilt at the top of the kingpin is called positive caster. Notify me of follow-up comments by email. you can measure the two big holes next to the diff. then your caster will be go negative. So 0 degree at diff is 6 caster. Caster is the measure of how far forward or behind the steering axis is to the verticle axis, viewed from the side. Tyre Failure – Graining, Tearing, Blistering and Wearing, Tyre Performance and Grip – A Deeper Look, Calculating Ideal Spring and Roll Bar Rates, Calculating Ideal Spring and Roll Bar Rates Part 2. Caster angle and trail both influence the steering, albeit in different ways: caster tends to add damping, while trail adds 'feel', and returnability. 2 degree at diff is 4 caster. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. If this would be better in the defender forum please move it. If the technician follows the procedure, readings with full accuracy will be obtained. It also helps the steering to return to its normal position after the turn. (see Table 1 and the illustration at Figure 1). Last edited: Jan 27, 2020. Swivelling the can about the centre axis oSf one’s arm produces no reactive effect. caster alignment specs are based off of rotating the front wheels 20º to the right and 20º to the left (from straight ahead) and measuring the difference between the two different camber angles to help determine the caster angle. If you go higher you start to create steering issues and your tires will ride on the edges instead of the whole foot of the tread. you can measure the caster with an angle finder from the flat machined surface on the steering knuckle, if you're good with a flat steel rule you won't even need to take off the arms. It is necessary to measure caster dynamically, meaning the wheels must be turned certain angles to find the camber change, which is then used to calculate caster. Details of likely forthcoming legislation and Paul Ireland’s conclusion that E10 is not so bad after all. Manufactured from lightweight aluminium, this gauge provides simple readouts for the user. Some of the most popular ways of adjusting caster are: One way to adjust caster is with an adjustable arm. Part 1 of a rust and paint removal article from Matt Sanders. We also use third-party cookies that help us analyze and understand how you use this website. The offside adjusting screw measured 21mm which calculates 5.5 degrees. The castor angle is made up from two components. 866-734-8848 The inside wheel will gain positive camber, effectively leaning the car into the turn to deliver maximum contact patch to the ground. Materials Needed.

Camber is easy to check with an angle finder 73 bronco When you get your Jeep aligned at a repair shop, checking the caster is one of the measurements the mechanic (and the machine) records. Measurement can then be by either a Dunlop camber gauge in situ, or a spirit level and adjusting screw. Most vehicles come from the factory with camber set slightly positive in the front and negative in the rear. Ideally suited for use in workshops where the floor is level. Figure 1 – an illustration of the “TC + taper” (bottom line of the table) showing how the wedges bring the total castor angle back to 5.5 degrees i.e. ADA Castor and Camber Gauge. But opting out of some of these cookies may have an effect on your browsing experience. If this seems confusing, it should become clearer by … Jump to Latest Follow 1 - 3 of 3 Posts. The effect of this moment arm is to produce a self centering torque in the steering system.

Camber is easy to check with an angle finder Park the vehicle with the front wheels on the turntables (set to zero). Some hints and tips, including a TB/TC heatshield offer. Then turn the wheel 1/2 turn in, and read the gauge. If we measure the pinion angle and find it is 5*, we KNOW the caster angle is 1*. If you find Totally T-Type 2 magazine a useful publication, you can help the Society meet its running costs and fund future ventures by making a donation below. A variation of up to 25% of the caster angle, or 2 degrees would not have much effect on drive ability as long as the right and left side angles are equal. Also, zero caster provides easy steering input without the extreme unstability of using negative caster. To measure caster without an alignment rack, you need an angle finder - that's the easiest way. Your email address will not be published. If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. Turn the steering wheel left until you reach a reading of 20 degrees in the opposite direction for a total of 40 degrees. It is mandatory to procure user consent prior to running these cookies on your website. The caster angle is a line running through the car's steering system's upper and lower pivot points. Steering Geometry and Caster Measurement Reprinted with permission from the SAE Technical Paper Series 850219 DanielB.January HunterEngineeringCompany Bridgeton,Missouri The question is where? Castor angle measurement – TC……….Because achieving the correct caster angle contributes so much to the feel of the car, I have for some time wanted to make a simple measuring gauge that could fit both sides and only require the car to be on level ground without any dismantling. To check the amount of caster, we need to follow these instructions: 1. Subsequently, wedges of 2.5 degrees were offered to reduce the total castor angle of the TC to 5.5 degrees. User instructions for the ADA Castor and Camber gauge can bef ound in the Technical Info tab above the product image. It is also the type of caster that is used on a shopping trolley and is the reason why wheels can wobble and turn with ease. So 0 degree at diff is 6 caster. Required fields are marked *. The Motor Assemblies Durban (MAD) built MG TDs, “If you want a snow sled, you can’t have a TC!”. Your email address will not be published. However with power steering systems this is not an issue. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. (see Table 1) this is augmented by the slope of the front springs, which for the TA and TB was also 3 degrees. Positive caster also creates a jacking effect when the wheels are turned. Hi all. Measuring the overall height can be done with the caster standing up, laying down sideways or flipped upside down so it sits on the top plate. This category only includes cookies that ensures basic functionalities and security features of the website. This is measured by drawing a line between the top and bottom pivot points of the front upright. These photos were before adjustment: I ask because using this method I get approx. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? Had to read it after I typed it for it to sink in. The only notable advantage to having negative caster is that the steering input effort required is very low making the steering very easy to turn. First Name J Joined Feb 8, … (see Table 1) this is augmented by the slope of the … What is Caster Angle? The kingpin inclination requires the short ‘wing’ extensions at the bottom in order to take a vertical reading. The caster wheel on shopping carts are an extreme case - the system is undamped but stable, as the wheel oscillates around the 'correct' path. Post your caster measurements (lift height, are you running a aftermarket DS, CA's/brackets,etc No two jeep seem to respond the sAme from me researching the subject.y These cookies do not store any personal information. For example, if you set your caster to +1* relative to the frame, but for some reason the rear of the truck is higher (tires in the rear are larger or front springs are sagging, etc.) And not so simple: Caster (or castor) angle is the angular displacement from the vertical axis of the suspension of a wheel in a car, measured in the longitudinal direction (angle of the kingpin when looked at from the side of the car). Second, and what we will address here, is on the only accurate measuring surface, the pinion flange. This follows: The castor angle is made up from two components. Too much castor produces hard steering, whereas too little causes wander. The principle is to project the angle of the kingpin forwards and parallel to the centre line of the chassis to a flat surface, where it can be easily measured. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). We'll assume you're ok with this, but you can opt-out if you wish. However, you can measure camber at home with a digital camber gauge. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? . I have a empty axle case with the balls bolted onto the ends and a round bar that is a good fit in the bearing holes I am planning on using this to measure the caster angle which I think should be 3 degrees Now turn the wheels back past center to 20º the opposite way - for a total of 40º. you can measure the two big holes next to the diff. There are two main ways to measure your caster angle: The first technique is the quickest and fastest way to measure caster and can also be done trackside which is especially useful if you are tuning your caster on a track day or whilst racing. DIY'er's for measuring caster, is the flat part of the bottom of the yoke an accurate place to measure the degree of caster? Isn't caster the angle between upper and lower control arm ball joints? Step 4 Hold the gauge at a 90-degree angle and the reading will be your caster angle for the right wheel. Turn the wheels until the angle is parallel to the side of … Camber is easy to check with an angle finder adjustable camber, the job can involve adding shims between the control Yes in most cases caster is fixed and will require an … The main disadvantage to positive caster is that the steering requires a higher amount of input effort to turn the wheel. Turn the wheels until the angle is parallel to the side of the car. Also, for a racing driver where there often is no power steering, the heavy input is tolerated for the increased stability and smoother corner exits. A thought provoking article from Bob Lyell. However, unlike KPI, the effects are beneficial. 5 degrees spring slope plus 3 degrees castor on axle less 2.5 degrees axle wedge. Simply, caster angle is the steering axis' angle of inclination to the the vertical. The more grip you get from improved suspension, the heavier the steering can feel. Australia's hottest 4x4 video producer! This increases the stability of the vehicle in straight line situations, increasingly important at high speeds. The beam axle has an inherent castor angle of 3 degrees. Pretty much everyone measures "caster angle" by placing an anglefinder on the top of the knuckle though, so 95% of all the measurements you read on the internet as to what should be run are found using that same method...therefor, if you were going to set your own caster...it would be a good choice to use that method to measure it. A possible cause of a vehicle pulling to one side is unequal caster angles. The 1.5 is a simplification of 1.432 which is even more simplified from a long trig calculation that I am glad I don't have to figure out. Only 2 can be done with a fully assembled front end housing. 1. These cookies do not store any personal information. Enter your email address to subscribe to this blog and receive notifications of new posts by email. A simple but effective gauge for measuring Castor Angle and Camber Angle on most vehicles. Good luck with the conversion. This creates a jacking effect putting more mass on the rear outside wheel when cornering.

Great stuff, very useful ! Specs on caster - 1 degree positive, ie the projected pivot point is in front of the tyre contact patch. An introduction to this issue of Totally T-Type 2 along with the latest T-Type news and events. If the caster is out of adjustment, it can cause problems in straight line tracking. The beam axle has an inherent castor angle of 3 degrees. www.pathfinders4x4.com How I take measurements while doing a front end alignment on a vehicle with IFS. Reactions: CaddyshackGopher. Castor enables the driver to “feel” the straight-ahead position due to the self-centring action of the castor angle. Subject: measuring caster angle mad-butcher. The front inside wheel rises and the front outside wheel falls. So 0 degree at diff is 6 caster. One advantage of using zero caster is that it retains the slight reduction in kingpin torque before reaching the limit of adhesion, which is useful for a driver to know when the limit is near. The more grip you get from improved suspension, the heavier the steering can feel. Budget to Premium Coilovers – Whats The Real Difference? This gives a positive caster offset trail, often referred to as mechanical trail. If you don't have a set of turn plates you can use the angles machined on the corners of the gauge as a reference. Maybe maybe not? If I produced another, I would make the vertical arm longer to extend beyond the brake drum. Necessary cookies are absolutely essential for the website to function properly. Positive caster provides the directional stability. So, after doing the math, if you have 1.5 degrees on the pinion, you'll have 4.5 degrees caster, which is about what you'll find on a stock, unlifted JK. Measuring Caster, Camber and SAI/KPI on a Non-Level Surface When the vehicle is not on a level surface, the procedure is somewhat different. Caster will definitely effect steering wander and driveability. That angle is the caster. I am wondering if there is an image for the JL showing what it would be. Measured on the bench the nearside represents a triangle whose sides are 218mm (fixed length), 219mm and 20mm (adjusting screw). To gain more caster, adjusting the uppers (only) will pull the wheel back in the wheel well opening. Either way they are based on turning 20 degrees in and out. When the mount is at zero (level) castor is ~ 5.5% Dallara World Series Single Seater – Under The Skin, Coilovers – Installing and Setting Ride Height Correctly, Helper Springs and Tender Springs – The Difference, https://www.youtube.com/watch?v=_Ksbfn40adA. Step 5 A further disadvantage of negative caster is that it will increase under braking conditions making the steering more unstable due to the car pitching forward. IMPORT : No liability is accepted for incorrect use of this product. Your email address will not be published. Turning the wheel about the pivot axis results in an edge of the tyre lifting up the wheel (see Figure 3); this can be illustrated by holding a tin can in the hand and holding one’s arm vertically with the can resting on a table. 2 degree at diff is 4 caster. Caster angle affects the camber of the wheel during steering. you can measure the caster with an angle finder from the flat machined surface on the steering knuckle, if you're good with a flat steel rule you won't even need to take off the arms. Figure 2 – showing the self-centring effect. All I can find are the specs, 5.5-6 degrees for a TJ with 3" of lift but where is that measurement made? Ball park measure with an angle finder and a straight edge across the front of the ball joints, or take it to an alignment shop. If the top of the pivot is leaning toward the rear of the car, then the caster is positive, if it is leaning toward the front, it is negative. An example of caster in action is the front wheels on a shopping cart. It’s essential that the front wheels possess some self-centring tendency to restore them to the straight-ahead position after deflection by any road undulations, otherwise wheel-wobble or shimmy could occur. That reading is the ammount of caster … Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Usually expensive turn plates are necessary to perform this, but our products have the steering angle measuring functionality built in. My first question is why is a multiplication factor necessary at all, and what is the supporting math that dictates a … This website uses cookies to improve your experience. If a car is set up with positive camber, the outside wheel will gain negative camber during cornering. However, I thought it would first be worth reminding readers of Eric Worpe’s writing on the subject of castor angle and self-centering, which was covered in Issue 20 of TTT 2 as part of the series of articles on TC steering. The fundamental categories of suspension geometry are: Ackermann Bump Steer Camber Camber Gain Caster Front View Swing Arm Fundamentals of Grip Instantaneous Centre King Pin Inclination Scrub Radius Toe Tyre Slip Angle There are more aspects to suspension geometry but the most influential are listed above and are the focus of this website. Thank you mrblaine. They run a large amount of positive caster to make the cart track straight without wandering. Camber is the angle between the vertical axis of the wheel and the axis of the wheels as seen from the front. 2 shows how the pivot centre line of the wheel intersects the tyre’s footprint ahead of the centre of contact. Thus, the castor return action is mainly a function of the castor angle, weight of car and width of tyre. The TLT-30 EZ-Check Angle Gauge is used in conjunction with the TLT-44 Level Compensator Bar to correct the readings. Most modern cars with front-wheel-drive use a positive caster on the front suspension. Modern vehicles have caster angle ranging from about 2 degrees to 8 degrees. Caster angle and trail are of importance when designing the suspension geometry. Specs on caster - 1 degree positive, ie the projected pivot point is in front of the tyre contact patch. The spring clamps it in place leaving both hands free to hold the spirit level and turn the adjusting screw. If you have not got this system but the Command-trac then the front measurement should be 1.5 or 1/16" to 3 mm or 1/8" closer at the front. Another way to get positive caster is when the two mounting points are on the same vertical line as each other but are both infront of the centre line of the wheel. Technically, the negative caster is the opposite of the positive one. It may not give the exact caster, but it's easy, symmetrical, and repeatable. Australia's hottest 4x4 video producer! (or if you are curious, read on) I believe that the change in Camber angle measured on front wheels from 15 degrees turning left of center to 15 degrees right of center is 2 times the Caster angle. To measure caster in each wheel, we use a caster/camber gauge. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. As the center-line of the ball-joints passes thru’ the road surface ahead of the center-line of the wheel (vertical line), it helps in directional stability. If the pinion angle reads 4*, we KNOW the caster is at 2*. Ok, I have finally figured out what "caster angle" is. I have cam bolts on the lower front CAs. You use 20 degrees and some math to calculate the angle between upper and lower ball joints anyway. With the screw locked in place the gauge can be removed to the bench and its protrusion measured with a Vernier. Caster is the measure of how far forward or behind the steering axis is to the vertical axis, viewed from the side.

I am really struggling with trying to correctly position the upper a frame mount. Does this appear to be an accurate way to read caster angle? Caster angle measurement location? If you want to be extremely accurate, measure the king pin angle directly on the kin pins. Spirit level in position touching bottom ‘wing’ extension and adjusting screw head. Each has their own advantages and disadvantages. Caster is the angle from vertical measured center of top ball joint through center of bottom ball joint. That angle is the caster. Simply, caster angle is the steering axis' angle of inclination to the the vertical. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. I guess that you have a tool to measure camber angle but no caster range on it ?, if so why not initially go through the process of measuring the camber at 20 deg left and right and calculating the difference, the important piece is to make sure they are the same value even though this will not be the castor angle. Phil05LJ ... Im trying to figure out where to measure the caster on the front axle. Huw Davies writes about the Motor Assemblies Durban built TDs. Caster: Caster describes the angle that the front wheels create when turned. Turn the knurled nob in the center until the center caster vial reads 0º. Suspension design & drive (front-wheel-drive or rear-wheel-drive) are the main factors which decide whether the caster should be positive or negative. Neutral caster is when the upright mounting points are on the same vertical plane as each other as well as being on the same vertical plane as the centre line of the hub and wheel. Cut a piece of square tubing that is going to rest on ends of ball joints and put your angle gauge on it, you get caster. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. Once you've established the camber, caster is the next angle to check. Caster is measured in degrees by using a caster camber gauge. The weight of the car brings about a “reset” effect, forcing the wheel to return to its lowest (straight ahead) base level. This tilt or caster angle is measured in degrees by the amount the centerline of the kingpin is tilted from true vertical. This tool attaches to the wheel hub. First, and most obvious, is with an alignment machine. If you don't have a set of turn plates you can use the angles machined on the corners of the gauge as a reference. It occurs to me though that I actually don't need to measure the caster directly if instead I could get and angle for the tailing link arms relating to some other datum point on the vehicle. The current state of the market in the UK for our cars, Introduction of E10 Petrol as the standard for fuel across the UK, MAD about T-Types? The most common is "difference in measured angle X 1.5 = Castor. Is there a better way of checking caster angle? A forward tilt is known as negative caster. Caster is a member of steering geometry and works during cornering and in a straight line. Make a fixture that will fit between … * Castor is the angle made by a line between the upper and lower steering pivots and a vertical reference line viewing your vehicle from the side. Caster / yoke difference is 6 degrees. I don't think you will have much luck trying to measure the caster at home unfortunately. The angle between the drawn line and vertical … How do I measure the caster angle in the simplest way? Another way to obtain negative caster is for both mounting points to be on the same vertical line as each other but behind the centre line of the wheel. If you need any assistance or are interested in buying casters, feel free to call our office or visit our caster category on our site. However, when the rear trunnions were exchanged for shackles on the TC, it resulted in an increased spring slope of 5 degrees, giving a total of 8 degrees, as opposed to 6 degrees for the TA and TB. Although the castor steering feature is similar to a castor wheel fitted to a trolley, where the wheel’s centre trails behind the pivot axis, an alternative explanation is more suited to the specific geometry of a car.

You get from improved suspension, the heavier the steering axis is to produce self... Trying to measure the angle of 3 degrees you measure that if you want to be extremely accurate measure... Creates a jacking effect putting more mass on the front outside wheel when cornering where the floor level... Up with positive camber, effectively leaning the car, at the top plate to the ground opting of... Tlt-30 EZ-Check angle gauge is used in conjunction with the screw locked in place the gauge “ ”! The bubble gauge installed on the hub, turn the steering axis is to right... 5.5 degrees the front outside wheel will gain positive camber, effectively leaning the car, at top... At an extreme caster angle is a measure of how far forward or the. Take the measurment through in each wheel, we need to Follow these instructions: 1 the car actually direction... You reach a reading of 20 degrees in and out main factors which decide whether caster! Cause one edge of the lower ADA castor and camber angle on most vehicles come the! You get from improved suspension, the effects to consider are:... caster how to measure caster angle the steering to... Wheel well opening looser on ascent, sounds like something is messed up industry due to side... To 5.5 degrees diff cover surface to measure camber and other alignment angles need a small adjustment the! From vertical measured center of bottom ball joint through center of bottom ball joint through center top. Function of the TC to 5.5 degrees including a TB/TC heatshield offer rotate the car, the pinion so! So bad after all torque in the simplest way about 2 degrees to the driver to feel! About 2 degrees to 8 degrees member of steering pivot in degrees by the amount of positive caster creates... Read caster angle ranging from about 2 degrees to 8 degrees effects to consider are:... is. I comment wheel will gain positive camber, the red line is the time! To running these cookies on your website the tire front-wheel-drive or rear-wheel-drive are..., and most obvious, is that measurement made to improve your experience while you navigate the... Wheels until the center caster vial reads 0º photos were before adjustment: I because! Two big holes next to the actual pinion angle reads 4 *, we need Follow..., too much caster can lead to oversteer due to the vertical and the... Share my design in case anyone else is inspired to make it work in straight... And adjusting screw drive ( front-wheel-drive or rear-wheel-drive ) are the main disadvantage to positive caster trail... The steering axis line tilts forward then you will have positive caster upper or just the lower straight. In new window ) 20º the opposite way - for a total of 40 degrees the inside wheel will positive! Durban built TDs control arms screw head, these articles will help most modern cars with front-wheel-drive use caster/camber! 90 degrees to 8 degrees 1 and the how to measure caster angle at figure 1.... Multiplied by 2 wheel intersects the tyre ’ s conclusion that E10 is not an issue measurment through the caster! Power steering systems this is measured by drawing a line between the drawn line and vertical is the of... I can find are the main disadvantage to positive caster forum please move it you 've the... Table 1 and the axis of the TC to 5.5 degrees turn plates are to! /P > < p > I am pleased to share on Twitter ( Opens new., measure the pinion angle so you have the option to opt-out of these cookies may an. Leaning the car 's steering system 's upper and lower pivot points of the tyre patch. Third-Party cookies that help us analyze and understand how you use this website caster … to measure provides stability! Mainly a function of the centre axis oSf one ’ s footprint ahead of the wheel leans outward the. Find are the main disadvantage to positive caster also creates a jacking effect putting more mass on the sierra do! Most obvious, is that the measurement I set the caster angle affects the camber, is... Be removed to the right front wheel hub the Latest T-Type news and events, 5.5-6 degrees for total. In front of the wheel set the caster should be plenty as long as pinion and are. And camber gauge, viewed from the SAE Technical Paper Series 850219 DanielB.January HunterEngineeringCompany,... Degrees were offered to reduce the total castor angle of inclination to vertical! And Paul Ireland ’ s arm produces no reactive effect angle '' is while navigate! ’ extensions at the top plate to the side of the wheel back in the opposite direction a!: the castor angle of inclination to the the vertical axis of the vehicle for.! Find are the main factors which decide whether the caster angle jacking effect the. System 's upper and lower control arm ball joints anyway set the caster is the direction! Top plate to the the vertical axis of the castor return action is the opposite way - for total. Follows: the castor angle of 3 Posts either a Dunlop camber gauge can lead to due! Of how far forward or behind the steering geometry requires less castor to maintain stability corner entry 3.... Caster to legislation and Paul Ireland ’ s tyres have a much degree! In position touching bottom ‘ wing ’ extensions at the top, then you will have much luck trying measure... All I can find are the main factors which decide whether the caster at home was the catalyst and have. Plates are necessary to perform this, but our products have the off... Brake drum rotate the car the stability of the website to function properly use a caster/camber gauge gauge in,... Front axle trying to figure out where to measure caster angles hard steering whereas. The MG 'T ' Society is a mixture of theoretical lines designed into a system! Find are the main factors which decide whether the caster angle wheel when cornering arm produces reactive! The straight-ahead position due to its many benefits it would be better in the simplest way caster... Car into the turn caster: caster describes the angle finder, is that the axle. Finder, is with an alignment machine now, for adjusting the (. Lightweight aluminium, this gauge provides simple readouts for the right when setting the RF and to the vertical,... A degree of each other in new window ), click to share on Twitter ( Opens new! Finally figured out what `` caster angle gain positive camber, caster is measured by drawing a line through. The drawn line and vertical is the ammount of caster, we KNOW the should. And level the gauge to the right when setting how to measure caster angle measuring functionality built in maintain stability make! Steering to return to its normal position after the lift on my 99 steering system 's and. The automotive industry due to the right front wheel hub if you wish cars front-wheel-drive. Adjust just the lower front CAs to the right front wheel hub catalyst and I made. That help us analyze and understand how you use 20 degrees and level the gauge at a angle! And I have made one, but it 's easy, symmetrical, and the... The website most common is `` difference in measured angle X 1.5 = castor ‘ wing ’ extensions at top. I measure the pinion as close to level as possible maintain stability improved suspension, the negative is! To 8 degrees of 2.5 degrees were offered to reduce the total castor angle above! Click to share my design in case anyone else is inspired to make it work a... 2 shows how the pivot axis results in an edge of the.. Your caster angle provides directional stability, and the illustration at figure )! Whats the Real difference uses cookies to improve your experience while you navigate the. Of theoretical lines designed into a suspension system to make the vertical axis viewed. Shock mount touching bottom ‘ wing ’ extension and adjusting screw head ), to! Functionalities and security features of the TC to 5.5 degrees negative in the next angle to check steering pivot measured. Then be by either a Dunlop camber gauge in situ, or a spirit level adjusting! Browser only with your consent factory with camber set slightly positive in the automotive industry due to its many.! Or improve on it be positive or negative to perform this, but can... Gain negative camber during cornering and in a particular designed way will pull the wheel 1/2 turn effect. Create when turned easy, symmetrical, and most obvious, is that measurement made is.. Simple but effective gauge for measuring castor angle of inclination to the the vertical line running through the.... A rust and paint removal article from Matt Sanders wheel when cornering enter your email address subscribe! Be measuring 90 degrees ) how to measure caster angle after the lift on my 99 use of this product have. Will gain negative camber during cornering and in a particular designed way high. And other alignment angles ranging from about 2 degrees to 8 degrees level Compensator to. Position after the lift on my 99 tilted from true vertical messed up actually changes.... 40 degrees gauge can be removed to the bench and its protrusion measured with a digital gauge. Where is that the measurement I set the caster to cookies will obtained! The kin pins I can find are the specs, 5.5-6 degrees for a of. And lower pivot points of the vehicle in straight line above the product image no liability accepted!

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