The end play is directly related to the radial play of the ball bearing. RADIAL PLAY is the maximum displacement that one bearing ring can be displaced relative to the other ring in a direction perpendicular to the axis of rotation of the bearing. One known arrangement for measuring mounted end play relies on magnets to hold the measuring assembly to a wheel end. Early Timken bearinged wheels used inner wheel bearing spacers of 3 different lengths to "adjust" wheel bearing endplay. All bearings will have an inner diameter (ID), an outside diameter (OD) and width (W).Bearings are sometimes referenced by these dimensions, in that order: ID x OD x W. Anyway, since I did the work, I thought I would at least post the diagnostic portion. Axial, or end play, is the maximum relative axial movement of the inner ring with respect to the outer ring. For equalizing bearings, the height must be checked using a flat plate, placed on the bearing shoes or placed babbitt face down on a People are recommending half a notch if one's dial indicator is measuring thousands. trailer axle wheel bearings to be between 500 and 1,000 lbf, and between 250 and 500 lbf for steer axle wheel bearings. The goal of this recommended procedure is to achieve a verifiable wheel bearing end play of 0.001 to 0.005 (.025 mm to .127 mm). I have replaced both front wheel bearings on both cars, no problems with .01-.02 mm play.
Radial play is the clearance measured perpendicular to the bearing axis or more specifically: average outer ring raceway diameter minus average inner ring raceway diameter SHARE POST #15. I don't think my dial indicator can measure down to that kind of accuracy. Stop oscillating the hub so that the dial indicator tip is in the same position as it was before oscillation began. Internal clearance or radial play is the amount of looseness between the balls and raceways of a bearing. This is due to elastic deformation. If there is any play, remove the hub cap and then release the parking brake. A short video showing how to measure wheel bearing end play. For the actual clearances used in the radial play groups, please see our RADIAL PLAY TABLES. Once an end play measurement is obtained, MSRP: Was: Now: $167.00. 7. Too much end play and the wheel will actually move laterally on the axle. 5DIAGNOSTIC: Wheel Bearing End Play Measure wheel bearing for excessive end play Use a dial indicator to verify acceptable endplay of 0.001"-0.005". That was "updated" to a shorter spacer and stepped washer and shim arrangement as Arnie describes. 5. Click to see full answer Also to know is, how do you measure wheel bearings? The three primary conditions of bearing setting are defined as: End-play. The spec is 0.001" to 0.005" A short video showing how to measure wheel bearing end play. Radial play = r. AXIAL PLAY, or end play, is the maximum relative displacement of the bearing rings, in a direction parallel to the axis of rotation. Re-torque the inner adjusting nut to 50 ft-lbs while rotating the wheel hub assembly. While rotating my tires, the front wheel bearings felt "loose" when I would check for play (grabbing tire, and vigorously shaking side to side on wheel----in relation to the axle). Axial, or end play, is the maximum relative axial movement of the inner ring with respect to the outer ring. The end play is directly related to the radial play of the ball bearing. In most part numbering systems axial play is not normally specified. Recheck bearing end play. Add If using a dial indicator to measure shaft movement, it should be located as close as possible to the bearing. Ideally, axial proximity probes should be used to measure the gap along with dial indicators to confirm the probes setup. Changes in end play can sometime occur. Compensation factors are used in these cases. There is often confusion with looseness and precision level.
The bearing end play is equal to the total indicator movement, which should be between .001 and .005 inches. Install and torque the outer jam nut as per chart below. Refer to ConMet Service Manual It's carrying a mild, pretty steady axial load, and a moderate, pretty steady radial load, at a moderate, steady speed.
There is a circular depression in the retainer that fits over the bearing/seal, and that's where the shims go, decreasing the end play. Pull on it hard enough to move it, if you can't, it's too tight. The goal of this recommended procedure is to achieve a verifiable wheel bearing end play of 0.001 to 0.005 (.025 mm to .127 mm). This method of using tapered roller bearings requires that a minimal amount of axial end play be provided at assembly. The Technology & Maintenance Council Recommended Practice 618B suggests .001 to .005 inches of end play, with a goal of trying to get as Axial play = a.
Check the bearing end play. Install the locking washer. Spec- 0.001" to 0.005" ^That's the one I have. A system for use in measuring an end play of a wheel hub assembly includes a follower configured to extend through an opening in a cover connected to a wheel hub. You can measure the dimensions of a bearing by using a vernier caliper like the one below or measuring accurately with a ruler. Industry guidelines recommend acceptable end play settings between 0.001 and 0.005 (0.0254 and 0.127 mm) clearance. This procedure applies to steer, drive and trailer axle assemblies using conventional double nut or single nut systems on Class 6, 7 and 8 trucks. The circular shims are between the bearing retainer and the bearing/seal. Hub End Play Gauge for Wide Five & 2" 5x5 Hubs Our hub end play gauges are the quickest way to accurately set-up bearing pre-load spacers. Wheel Bearings The most accurate bearing end play measurement is obtained with the brake drum and tires removed. If there is excessive play moving the ABS Electronic Controller; ABS Modulator Valve; ABS Wheel Speed Sensor; (Per Unit of Measure) 1: Applications / Fitments: APPLICATION BY AXLE: Type of Product: simple: Width: 3.25 in. With these settings, bearings, seals and other wheel-end components provide maximum performance. If end play measures greater than 0.005 (0.127 mm), tighten the Temper-Loc nut and re-measure. Axle Wheel Bearing Installation Specifications NOTE: For disc brake wheel ends, back off the brake caliper until the rotor is clear from the pad linings about 1/16-inch (1.588 mm) gap or more. Call it 2/3 of an increment on a .001 indicator and be happy. 6. Air Brakes. The goal of this recommended procedure is to achieve a verifiable wheel bearing end play of 0.001 to 0.005 (.025 mm to .127 mm). Also if your wheel feels like it has drag now the end play is most likely to tight. Use a dial indicator to measure end play. Advertisement. Initially setting end play requires measuring the available space between the bearing housing and the thrust collar and the bearing's overall height. Place a dial gauge against the hub surface, then move the hub in the axial direction and check whether or not there is end play. I know the recommended procedure people are following for setting front wheel bearing is to use a dial indicator and, with the base on the rotor measure the end play of the spindle. The outside bearing should be removed and inspected, if possible, based on the hub design, Hogg said. SKF- Chapter 5- Reinstallation. The ball bearings used for front wheel bearing applications are an angular type. Attachments 1.JPG This refers only to torque specifications and bearing adjustment. Contact; Measuring Wheel Bearing Play. The bearing is a twin taper roller bearing with a split inner race. *Acceptable end-play is .001"-.005". Definition of Axial Play in a Ball Bearing. Excessive play in the wheel indicates loose components, whether a wheel bearing or tie rod or ball joint. 8. Texas57ALLIANCE MEMBERfrom Amarillo, Tx1952-59 Ford Social Group. If you back it off one-fourth of a turn, it will move away from the bearing about 0.020 inch - or about four times RP 618's maximum recommended end play of 0.005 inch. Wheel bearings can be of either ball or tapered roller type. To eliminate the guesswork, the TMC RP618 was designed for heavy duty wheel bearing adjustment and allows for a slight amount of end-play. November 19, 2012. Then the adjustment nut is loosened 1/6 to 1/4 a turn and locked in place with a new cotter pin. As a rule, end play should be about 0.001 to 0.005. There should be no play on most FWD cars, but up to 0.010 of play in the front bearings may be acceptable on RWD vehicles. In the late 1970s, the hub bearing began to appear on FWD vehicles. Use a dial indicator to verify acceptable endplay of .001 - .005 (NOTE: If end play is not within Inspect the play of the bearing while the vehicle is jacked up and resting on floor jack. Axial clearance between rollers and races producing a measurable axial shaft movement when a small axial force is applied first in one direction and then in the other while oscillating or rotating the shaft (the reference bearing load zone less than 180). If the end play is insufficient, the wheel bearings will experience excessive axial compression force which results in the generation of excessive frictional heat within the bearings. apparatus for measuring axial play in a wheel bearing that rotatably supports a wheel hub on an axle, the axle having an end reference surface and the wheel hub having threaded fastener elements that extend parallel to the longitudinal axis of the axle, said apparatus comprising: a single fixed support rod attached to one of said threaded For optimal bearing life, you want to have an ideal bearing end-play setting between 0.001 inches and 0.005 inches in heavy-duty wheel-end applications. When it came to an actual measurement, though, it was spot on. If the brake drum and tires are installed and the bearing end play is greater than 0.003-inch (0.0762 mm): Remove the brake drum and the tire-wheel assembly. On taper bearing wheels end play is the measurement of axle play after torquing to spec.. Harleys are usually set to .003-.004". Dexters standard wheel bearing configuration consists of opposed tapered roller bearing cones and cups, fitted inside of a precision machined cast hub.
Sep 15, 2010. This tool screws onto your spindle and reads hub end play to .0005." Texas57, Dec 21, 2015. Ball or Roller Bearings. Yes: Please proceed to step 6. End Play Settings Must Always Be Measured To Verify Adjustment Setting On Every Wheel End. With regard to miniature and thin section bearings under such a load, the measured value is larger than the stated value for radial play. positions. Too little end play and your bearings are squished into the races causing premature failure or sometimes a wheel that won't even move. WARNING Park the vehicle on a level surface. How to Measure wheel bearing play. There might be some UTube vids of the procedure to show ya how it's done. No: Replace or adjust the wheel bearings as needed and reevaluate for steering wobble. Bearing Adjustment Dial Gage for Measuring End Play Bearing Adjustment Dial Gage for Measuring End Play Wheel Bearings; Undercarriage. Read the bearing end-play as the total indicator movement. Back off the inner adjustment nuts as per chart below. In most part numbering systems axial play is not normally specified. The overwhelming benefit of an annual inspection is to readjust the end play or to simply re-torque the retaining nut. It can be difficult to tell when a wheel bearing is out of adjustment without measuring wheel end play, Purvis added. Mount the indicators base as close to the center of the hub rotor as possible. An angular-type ball bearing will accept greater thrust loads than a Conrad-type bearing, which will accept a 100% load in the radial or thrust position and any combination of a 100% load.
Push and pull the wheel-end assembly in and out while oscillating the wheel approximately 45 degrees. Think of end play as the relationship of the bearings to the races when tightened down to factory specifications.