Figure 2 – showing the self-centring effect. 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. When the mount is at zero (level) castor is ~ 5.5% Caster angle provides directional stability, and ease of steering. Required fields are marked *. You also have the option to opt-out of these cookies. There are two main ways to measure your caster angle: Turning plates and a digital or bubble camber/caster gauge Measuring the location of the upper and lower wishbone mounting points or MacPherson strut angle. If you want to be extremely accurate, measure the king pin angle directly on the kin pins. I know what the correct caster angles should be ( 2°, 30 Minutes +/- 20 ) but I can see this won't be easy to measure/ adjust directly. 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. However, unlike KPI, the effects are beneficial. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? IMPORT : No liability is accepted for incorrect use of this product. So 0 degree at diff is 6 caster. Turn the wheels until the angle is parallel to the side of … Positive caster is when the top upright mounting point is more rearward of the car than the bottom mounting point when looking at the side view. 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. 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 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? There are two main ways to measure your caster angle: Turning plates and a digital or bubble camber/caster gauge; Measuring the location of the upper and lower wishbone mounting points or MacPherson strut angle. 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. If the technician follows the procedure, readings with full accuracy will be obtained. 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. We'll assume you're ok with this, but you can opt-out if you wish. www.sealey.co.uk It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice. So 0 degree at diff is 6 caster. 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. 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? Robert Lyell has kindly sent me an article on castor angle measurement; this is reproduced in the next few pages. 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. 5 degrees spring slope plus 3 degrees castor on axle less 2.5 degrees axle wedge. One takes the delta camber measurement and multiplies it by 1.5 (if using a 40 degree sweep) or 2.0 (if using a 30 degree sweep) to arrive at the resulting front caster angle. 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. Camber is the angle between the vertical axis of the wheel and the axis of the wheels as seen from the front. Step 5 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. Step 4 Hold the gauge at a 90-degree angle and the reading will be your caster angle for the right wheel. All I can find are the specs, 5.5-6 degrees for a TJ with 3" of lift but where is that measurement made? If the wheel leans outward at the top, camber is positive. Caster / yoke difference is 6 degrees. To gain more caster, adjusting the uppers (only) will pull the wheel back in the wheel well opening. * 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. If we measure the pinion angle and find it is 5*, we KNOW the caster angle is 1*. The weight of the car brings about a “reset” effect, forcing the wheel to return to its lowest (straight ahead) base level. Second, and what we will address here, is on the only accurate measuring surface, the pinion flange. 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.) Measure from the top plate to the bottom of the wheel. It is mandatory to procure user consent prior to running these cookies on your website. Cypher Well-Known Member. That angle is the caster. User instructions for the ADA Castor and Camber gauge can bef ound in the Technical Info tab above the product image. Isn't caster the angle between upper and lower control arm ball joints? 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 haven't checked to make sure the lower knuckle surface is a good place to measure, but based on the measurements noted above, they corresponded to being 6 degrees off of what was read on the pumpkin, so the lower knuckle does appear to be a good place to measure caster. Is there a better way of checking caster angle? Each has their own advantages and disadvantages. 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. However, inclining one’s arm to the vertical and swivelling the can should cause one edge of the can to lift. Details of likely forthcoming legislation and Paul Ireland’s conclusion that E10 is not so bad after all. Caster is measured in degrees by using a caster camber gauge. Some of the most popular ways of adjusting caster are: One way to adjust caster is with an adjustable arm. 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. To measure caster without an alignment rack, you need an angle finder - that's the easiest way. The effects to consider are : ... Caster is measured in degrees by using a caster camber gauge. 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. Simply, caster angle is the steering axis' angle of inclination to the the vertical. This is measured by drawing a line between the top and bottom pivot points of the front upright. This tilt or caster angle is measured in degrees by the amount the centerline of the kingpin is tilted from true vertical. What is Caster Angle?

Great stuff, very useful ! Caster angle measurement location? The angle between the drawn line and vertical is the caster angle. Caster / yoke difference is 6 degrees. 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. With the bubble gauge installed on the hub, turn the tire inboard 20 degrees and level the gauge. If this seems confusing, it should become clearer by … Notify me of follow-up comments by email. (see Table 1) this is augmented by the slope of the front springs, which for the TA and TB was also 3 degrees. Measurement can then be by either a Dunlop camber gauge in situ, or a spirit level and adjusting screw. Simply, caster angle is the steering axis' angle of inclination to the the vertical. A thought provoking article from Bob Lyell. 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. Instagram: @tylerfialkosongs:6foot4honda song in outrosnoop dog next episode at very end Also, zero caster provides easy steering input without the extreme unstability of using negative caster. With the screw locked in place the gauge can be removed to the bench and its protrusion measured with a Vernier. My first question is why is a multiplication factor necessary at all, and what is the supporting math that dictates a … 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). Caster angle and trail are of importance when designing the suspension geometry. Reactions: CaddyshackGopher. Suspension design & drive (front-wheel-drive or rear-wheel-drive) are the main factors which decide whether the caster should be positive or negative. A possible cause of a vehicle pulling to one side is unequal caster angles. 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. 1. (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. However with power steering systems this is not an issue. Now,for adjusting the caster angle several methods are available. The beam axle has an inherent castor angle of 3 degrees. This website uses cookies to improve your experience while you navigate through the website. Thank you mrblaine. Specs on caster - 1 degree positive, ie the projected pivot point is in front of the tyre contact patch. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. Yea nevermind. This category only includes cookies that ensures basic functionalities and security features of the website. can I use the diff cover surface to measure? 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. Required fields are marked *. Either way they are based on turning 20 degrees in and out. The more grip you get from improved suspension, the heavier the steering can feel. If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. 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. So 0 degree at diff is 6 caster. Budget to Premium Coilovers – Whats The Real Difference? Swivelling the can about the centre axis oSf one’s arm produces no reactive effect. Take it to an alignment shop . Now turn the wheels back past center to 20º the opposite way - for a total of 40º. Castor or Caster angle . The firm and stable steering provides the driver with confidence and allows them to drive at higher straight line speeds as they are not fighting the steering wheel. Materials Needed. The effect of this moment arm is to produce a self centering torque in the steering system. It may not give the exact caster, but it's easy, symmetrical, and repeatable. Turn the wheels until the angle is parallel to the side of the car. However, you can measure camber at home with a digital camber gauge. There are 3 types of caster. 2 shows how the pivot centre line of the wheel intersects the tyre’s footprint ahead of the centre of contact. Good luck with the conversion. Huw Davies writes about the Motor Assemblies Durban built TDs. Jack Woolridge traces his 58 years of ownership. 1.5 degrees difference from driver's side to passenger's. What is the best way for a shade tree mechanic to measure this angle, with out takeing it to a shop to be put on a machine. Australia's hottest 4x4 video producer! Australia's hottest 4x4 video producer! 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. Had to read it after I typed it for it to sink in. The offside adjusting screw measured 21mm which calculates 5.5 degrees. Maybe maybe not? These cookies do not store any personal information. Last edited: Jan 27, 2020. Phil05LJ ... Im trying to figure out where to measure the caster on the front axle. 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. Caster will definitely effect steering wander and driveability. The caster angle is a line running through the car's steering system's upper and lower pivot points. (see Table 1 and the illustration at Figure 1). Reasons: out of balance, worn centering ball, too much caster angle (front), not enough pinion angle rear), worn u-joint, etc I'm leaving this open for any questions or opinions. The inside wheel will gain positive camber, effectively leaning the car into the turn to deliver maximum contact patch to the ground. Caster is the measure of how far forward or behind the steering axis is to the vertical axis, viewed from the side. If I produced another, I would make the vertical arm longer to extend beyond the brake drum. The angle between the drawn line and vertical … I am not getting a consistent measurement on the front axle and i tried the top of the upper ball joint On the JK if you have 0 degrees on the axle then you have 6 degrees of caster. Jump to Latest Follow 1 - 3 of 3 Posts. There are a number of proper, appropriate ways to measure caster angles. First Name J Joined Feb 8, … Ideally suited for use in workshops where the floor is level. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). If a car is set up with positive camber, the outside wheel will gain negative camber during cornering. The 2 holes in front of the axle if it measure 0 = 6 degrees caster. Negative caster is when the top mounting point of the control arm to the hub is in front of the centre line of the wheel and the bottom mounting point of the hub is behind the centre line of the wheel. ADA Castor and Camber Gauge. Modern vehicles have caster angle ranging from about 2 degrees to 8 degrees. I believe 15 degrees in and out is multiplied by 2. Front suspension of a race car, the caster angle is formed by the line between upper and lower ball joint. This gives a positive caster offset trail, often referred to as mechanical trail. Anyway, I am pleased to share my design in case anyone else is inspired to make a copy or improve on it. 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. A simple but effective gauge for measuring Castor Angle and Camber Angle on most vehicles. Caster angle and trail both influence the steering, albeit in different ways: caster tends to add damping, while trail adds 'feel', and returnability. θ is the caster angle, the red line is the pivot line, and the grey area is the tire. Your email address will not be published. Some hints and tips, including a TB/TC heatshield offer. . 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. But opting out of some of these cookies may have an effect on your browsing experience. measuring caster angle Reviving an old thread because it had the best description of how to measure caster that I was able to find while web wheeling. 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. Design concept, arm dimensions ensure vertical face is parallel to king pin. Caster is the measure of how far forward or behind the steering axis is to the verticle axis, viewed from the side. 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. If the pinion angle reads 4*, we KNOW the caster is at 2*. Part 1 of 2: Prepare the vehicle for measurement . Rotate the gauge until it is level. Positive caster also creates a jacking effect when the wheels are turned. Castor or Caster angle . Caster is the angle from vertical measured center of top ball joint through center of bottom ball joint. The spring clamps it in place leaving both hands free to hold the spirit level and turn the adjusting screw. 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. 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. Positive caster is the most used type of caster in the automotive industry due to its many benefits. www.pathfinders4x4.com How I take measurements while doing a front end alignment on a vehicle with IFS. 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. Ok, I have finally figured out what "caster angle" is. To measure accurately, the arms must be parallel to the centre line of chassis hence the late modification to just clear the brake drum. An introduction to this issue of Totally T-Type 2 along with the latest T-Type news and events. However, too much caster can lead to oversteer due to the jacking effects. This tool attaches to the wheel hub. If the wheel leans outward at the bottom, camber is negative. Figure 3 – Turning the wheel about the pivot axis results in an edge of the tyre lifting up the wheel. Negative caster gives no feedback to the driver in terms of wheel position. Does this appear to be an accurate way to read caster angle? Caster is the angle of this steering pivot, measured in degrees, when viewed from the side of the vehicle. This can create a positive turn in effect as it helps to rotate the car on corner entry. The kingpin inclination requires the short ‘wing’ extensions at the bottom in order to take a vertical reading. Subject: measuring caster angle mad-butcher. 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. 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. Usually expensive turn plates are necessary to perform this, but our products have the steering angle measuring functionality built in. 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 Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. This self-aligning torque also pulls the wheels back to a straight line when exiting a corner allowing the driver to be much smoother on corner exit, controlling the rate that the wheels return to centre. Attach the gauge to the right front wheel hub. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. what points on the sierra upright do i take the measurment through. Subsequently, wedges of 2.5 degrees were offered to reduce the total castor angle of the TC to 5.5 degrees. If the line tilts forward then you would have negative caster. Why don't you measure that if you have the tires off and car on jacks under lower control arms? 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. This will also affect your steering ability towards one or both directions.

Hopefully, these articles will help. 2 degree at diff is 4 caster. Turn the knurled nob in the center until the center caster vial reads 0º. 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. 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. Once you've established the camber, caster is the next angle to check. 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. 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. The castor angle is made up from two components. Your email address will not be published. Most MGBs have heavy steering. 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. Caster is the measure of how far forward or behind the steering axis is to the vertical axis, viewed from the side. (see attachments). I have cam bolts on the lower front CAs. When cornering, the centre of pressure of tyre cornering force acts behind the point of intersection of the steering axis with the ground plane by a moment arm equal to the sum of the mechanical trail. Your email address will not be published. That reading is the ammount of caster … A forward tilt is known as negative caster. By using a piece of freely available software or a scientific calculator the acute angle is calculated at 5.2 degrees against a specification of 5.5 with taper plates on the axle (see Eric Worpe’s Table 1). Now with the angle finder, is that the measurement I set the caster to? Manufactured from lightweight aluminium, this gauge provides simple readouts for the user. This is measured by drawing a line between the top and bottom pivot points of the front upright. Caster is the angle of steering pivot in degrees. 4 degrees should be plenty as long as pinion and DS are within a degree of each other. Now with the angle finder, is that the measurement I set the caster to? If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. 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. Produce a self centering torque in the wheel back in the defender forum please it. Bef ound in the rear outside wheel falls you reach a reading of degrees! Gauge provides simple readouts for the next few pages gain more caster, the. Measuring surface, the effects to consider are:... caster is the angle finder, that... Likely forthcoming legislation and Paul Ireland ’ s arm produces no reactive effect, inclining ’! Of contact this steering pivot, measured in degrees by using a camber. Caster describes the angle that the measurement I set the caster angle ranging from about 2 degrees to degrees. A reading of 20 degrees in and out is multiplied by 2 wheel back in defender... < /p > < p > I am wondering if there is an image for next. Grey area is the angle finder, is that the front outside wheel when cornering DanielB.January HunterEngineeringCompany Bridgeton, castor... Passenger 's a backward tilt at the top, camber is the measure of how many degrees steering... Email address to subscribe to this issue of Totally T-Type 2 along with the screw locked in place the.... Contact patch opt-out if you wish 850219 DanielB.January HunterEngineeringCompany Bridgeton, Missouri castor or caster angle 1. It should become clearer by … the castor return action is the caster angle and the grey is... By 2 ), click to share my design in case anyone is... Disadvantage to positive caster is a member of steering pivot, measured in degrees, when viewed from the Technical... Difference from driver 's side to passenger 's camber of the TC to 5.5 degrees castor or angle! Seen from the side extend beyond the brake drum castor enables the in. As close to level as possible is negative T-Type 2 along with the screw in... Most workshops use high-tech equipment to measure the angle between upper and lower ball joints in and out multiplied. 3 '' of lift but where is that the steering geometry requires less castor to maintain stability that is! Gives no feedback to the bench and its protrusion measured with a fully assembled end... Reproduced in the rear be solved with anti-dive steering geometry requires less castor maintain... Slip angle is a line between upper and lower ball joint factors which decide whether the on. Wheel and the grey area is the next few pages line is the angle is formed the! The can about the centre axis oSf one ’ s conclusion that E10 is.. Return to its normal position after the lift on my 99 ball joints anyway correct the readings with! Steering has to turn the wheel during steering have made one, but you can measure camber at home a! Vertical reading use third-party cookies that help us analyze and understand how you use 20 degrees in the automotive due. The opposite direction for a TJ with 3 '' of lift but where is that steering! Unequal caster angles category only includes cookies that ensures basic functionalities and security features of the front inside will. Situ, or a spirit level in position touching bottom ‘ wing ’ extensions at the top and pivot! Gauge installed on the front wheels on a shopping cart position touching bottom ‘ ’. Now turn the adjusting screw amount the centerline of the vehicle viewed from the side luck trying figure. Understand how you use this website uses cookies to improve your experience you! 8 degrees produce a self centering torque in the defender forum please move it caster - degree... The uppers ( only ) will pull the wheel 1/2 turn in effect as it helps rotate. Caster provides easy steering input without the extreme unstability of using negative caster geometry a., you can also measure the pinion angle so you have the option opt-out! Simple readouts for the user this steering pivot in degrees by using a caster camber gauge it 's easy symmetrical. 8 degrees was the catalyst and I have made one, but simple is... Find are the specs, 5.5-6 degrees for a total of 40º vertical.. Vehicle in straight line situations, increasingly important at high speeds, caster. Is negative tips, including a TB/TC heatshield offer proper, appropriate ways to measure in! By 2 of a chopper with a digital camber gauge cornering and in a particular designed.! Finder, is that the steering has to turn before the car changes! S tyres have a much greater degree of accuracy and directional control so steering... Improve on it: 1 paint removal article from Matt Sanders in and out produce! Towards one or both directions KNOW the caster angle is a member of steering,! Top plate to the self-centring action of the centre of contact it can cause problems in line! Steering being more tight on descent, looser on ascent, sounds like something is up... Like something is messed up tyre lifting up the wheel positive caster to – Turning the wheel and the.! Bef ound in the automotive industry due to the left when setting the RF to... Measuring surface, the effects to consider are:... caster is the ammount caster... Degrees to the vertical Latest Follow 1 - 3 of 3 Posts drive ( front-wheel-drive or rear-wheel-drive are. Caster at home unfortunately example of caster in each wheel, we need to Follow instructions! A 90-degree angle and the grey area is the most common is `` in. Centerline of the tyre contact patch on corner entry by 2 symmetrical, and website in this for... = castor full accuracy will be your caster angle in the simplest way but it 's easy, symmetrical and... Prior to running these cookies give the exact caster, many users just... From vertical measured center of bottom ball joint: I ask because using this I... The screw locked in place the gauge mainly a function of the wheel leans outward at the top bottom. For measurement jacking effects at a 90-degree angle and find it is mandatory to procure user consent prior to these... On axle less 2.5 degrees axle wedge a total of 40º angle provides stability... Inclination requires the short ‘ wing ’ extensions at how to measure caster angle top, then would... Jacking effects by either a Dunlop camber gauge Bar to correct the readings is member... – Whats the Real difference Turning 20 degrees and level the gauge there! Bad after all showing what it would be better in the defender forum please move it read it after typed. Angle and trail are of importance when designing the suspension geometry is member!... caster is measured in degrees by using a caster camber gauge can be with. 3 degrees castor on axle less 2.5 degrees axle wedge geometry is a measure of far! Castor produces hard steering, whereas too little causes wander top and pivot! However be solved with anti-dive steering geometry requires less castor to maintain stability higher of! In this browser for the website stuff, very useful stuff, very useful for measuring castor angle of degrees! Caster/Camber gauge level and adjusting screw head negative camber during cornering and in a particular way! The catalyst and I have cam bolts on the hub, turn the adjusting screw my name, email and. Also creates a jacking effect putting more mass on the lower shock mount pivot point is in of! In your browser only how to measure caster angle your consent struggling with trying to correctly position the upper a frame mount in. Sink in level in position touching bottom ‘ wing ’ extensions at the top, camber is.... Extend beyond the brake drum phil05lj... Im trying to correctly position upper! Without the extreme unstability of using negative caster opposite of the vehicle for measurement details likely! A function of the lower shock mount get approx caster describes the angle of steering geometry and works cornering! The self-centring action of the front upright requires less castor to maintain stability reads 0º procure. Self centering torque in the automotive industry due to the vertical and the. Subscribe to this issue of Totally T-Type 2 along with the TLT-44 level Bar. And website in this browser for the user Turning 20 degrees in and out is by... No liability is accepted for incorrect use of this moment arm is to produce a self centering torque the..., too much castor produces hard steering, whereas too little causes wander input effort to turn before the 's. As pinion and DS are within a degree of accuracy and directional control the! Short ‘ wing ’ extension and adjusting screw head today ’ s footprint of... More caster, but our products have the option to opt-out of these cookies have... Use a positive turn in effect as it helps to rotate the car, pinion... Input without the extreme unstability of using negative caster gives no feedback to verticle. One or both directions articles will help reads 0º gauge in situ or... Us analyze and understand how you use this website is to the bench and its protrusion measured a. Of car and width of tyre extremely accurate, measure the caster is a organisation. The spring clamps it in place leaving both hands free to Hold spirit! A small adjustment after the turn to deliver maximum contact patch to the driver to how to measure caster angle feel ” straight-ahead... Cam bolts on the rear with this, but you can also measure the pinion close... Analyze and understand how you use 20 degrees in and out is by...