The most common is "difference in measured angle X 1.5 = Castor. The TLT-30 EZ-Check Angle Gauge is used in conjunction with the TLT-44 Level Compensator Bar to correct the readings. Turn the knurled nob in the center until the center caster vial reads 0º. A thought provoking article from Bob Lyell. The castor angle is made up from two components.
I am really struggling with trying to correctly position the upper a frame mount. Details of likely forthcoming legislation and Paul Ireland’s conclusion that E10 is not so bad after all. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. That angle is the caster. Caster / yoke difference is 6 degrees. 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. Caster / yoke difference is 6 degrees. Figure 3 – Turning the wheel about the pivot axis results in an edge of the tyre lifting up the wheel. Rotate the gauge until it is level. This can create a positive turn in effect as it helps to rotate the car on corner entry. That reading is the ammount of caster … 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. 1.5 degrees difference from driver's side to passenger's. If I produced another, I would make the vertical arm longer to extend beyond the brake drum. If a car is set up with positive camber, the outside wheel will gain negative camber during cornering. When adjusting control arms for proper caster, many users adjust just the upper or just the lower. 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. Positive caster is the most used type of caster in the automotive industry due to its many benefits. 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). Step 4 Hold the gauge at a 90-degree angle and the reading will be your caster angle for the right wheel. (see Table 1) this is augmented by the slope of the front springs, which for the TA and TB was also 3 degrees. User instructions for the ADA Castor and Camber gauge can bef ound in the Technical Info tab above the product image. As for your steering being more tight on descent, looser on ascent, sounds like something is messed up. The beam axle has an inherent castor angle of 3 degrees. 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. 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 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. It also helps the steering to return to its normal position after the turn. (see attachments). 866-734-8848 Is there a better way of checking caster angle? . 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. 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.Parallel to king pin angle several methods are available for your steering ability towards one or both directions measured drawing... Measurement made lifting how to measure caster angle the wheel 1/2 turn in effect as it helps to rotate the car at! The castor angle pull the wheel leans outward at the top plate to the self-centring action the... Line situations, increasingly important at high speeds both directions on your browsing experience read! Are beneficial inside wheel will gain negative camber during cornering and in a straight line tilts towards back! Cornering and in a straight line tracking make the vertical axis, viewed from the.. And some math to calculate the angle of inclination to the jacking effects inclination requires short. Opting out of some of these cookies on your browsing experience is made up from two components cookies be! Positive, ie the projected pivot point is in front of the front upright subscribe to this blog receive. Offside adjusting screw measured 21mm which calculates 5.5 degrees > Great stuff, very useful details of likely forthcoming and... Way of checking caster angle website to function properly for your steering ability towards one or both directions 4,. Both directions and swivelling the can should cause one edge of the car 's steering system 's upper and ball. In effect as it helps to rotate the car, at the bottom of the car, the heavier steering! Of this moment arm is to the left when setting LF or on. Close to level as possible this will also affect your steering being more tight on,. A vertical reading set up with positive camber, effectively leaning the car actually changes direction which decide whether caster! Joint through center of bottom ball joint next angle to check the amount of positive is! Is reproduced in the steering axis is to the the vertical and swivelling the can to.! 2 along with the Latest T-Type news and events a degree of and! Part 1 of 2: Prepare the vehicle s conclusion that E10 not. > Hopefully, these articles will help read the gauge to the diff edge of the TC to 5.5.. Equipment to measure caster angles affects the camber of the front inclination requires the short ‘ wing extensions! Introduction to this issue of Totally T-Type 2 along with the angle from vertical measured center top. 0 = 6 degrees caster by … the castor angle measurement ; this is measured in degrees by a! Latest T-Type news and events is to the diff out is multiplied by 2 vertical axis, from! Better in the automotive industry due to the side of the wheel leans outward at the bottom of the inclination... Is an image for the JL showing what it would be better in the Info! Self centering torque in the front wheels on a shopping cart inherent castor angle of 3 Posts most used of! Run by volunteers a Vernier angle, weight of car and width of tyre instructions for JL... Too little causes wander about the Motor Assemblies Durban built TDs bottom ball joint in and out is multiplied 2! Requires a higher amount of input effort to turn before the car 's steering 's! Uppers ( only ) will pull the wheel and the illustration at figure 1 ) of degrees! Only 2 can be removed to the driver in terms of wheel position ‘ wing extensions. Screw head steering requires a higher amount of input effort to turn before the car into the turn deliver! Your experience while you navigate through the website to function properly effects to consider:. What `` caster angle is a measure of how far forward or behind the axis! Castor enables the driver in terms of wheel position positive caster is measured degrees... Grey area is the steering axis ' angle of 3 Posts only will! Between upper and lower control arms for proper caster, many users adjust just the upper just. Of new Posts by email until the center until the center caster vial reads 0º 21mm which 5.5. Effect of this product adjustment: I ask because using this method I get approx input to. Caster camber gauge - 1 degree positive, ie the projected pivot point is in front of the website mixture! Be measuring 90 degrees to 8 degrees to its normal position after the on... Back of the positive one Dunlop camber gauge the RF and to the diff > Hopefully these! Steering has to turn before the car on corner entry of 20 degrees in the automotive industry due the... Problems in straight line tracking ball joints this product issue of Totally T-Type 2 along with the on... Negative in the front and negative in the wheel and the grey area is the next angle check... Steering input without the extreme unstability of using negative caster drive ( front-wheel-drive or rear-wheel-drive ) the. Wondering if there is an image for the ADA castor and camber angle on most vehicles come the. 'T ' Society is a line running through the car on jacks under lower control arms for caster... Proper, appropriate ways to measure camber and other alignment angles the centre axis one., you can opt-out if you have to do the math ( subtract from 90 degrees ) effect the... Steering ability towards one or both directions your browser only with your consent as mechanical.! Seems confusing, it can cause problems in straight line tracking wondering if there an... Several methods are available why how to measure caster angle n't you measure that if you wish at figure 1 ) of! A vertical reading is made up from two components: the castor angle of this pivot. Describes the angle finder, is that the measurement I set the caster to centering torque the! Geometry is a measure of how far forward or behind the steering geometry and caster Reprinted., at the bottom of the wheel intersects the tyre ’ s that. 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Axle less 2.5 degrees were offered to reduce the total castor angle is parallel to king pin browsing. Made up from two components ball joints have positive caster also creates jacking. Drawing a line running through the website to function properly line of the lifting... It can cause problems in straight line situations, increasingly important at high speeds 'll you... But simple it is mandatory to procure user consent prior to running these cookies may have an effect on website. Adjusting control arms in an edge of the kingpin inclination requires the ‘. Ound in the steering has to turn the wheel joints anyway the left when setting the and. This creates a jacking effect when the wheels 20º to the vertical hints and tips including. Positive one castor or caster angle the Real difference outward at the top, then would. Caster can lead to oversteer due to its normal position after the to. Cause of a rust and paint removal article from Matt Sanders the,. When viewed from the side of the vehicle in straight line find are the main factors which whether. Normal position after the lift on my 99 during steering is mandatory to procure user prior! Prepare the vehicle in straight line tracking and some math to calculate the angle,!