Wheel Bearings

Bearing uses Pivots Wheels Rotating shafts Oscillating shafts Sliding shafts

BEARING LOAD RADIAL LOAD - When bearing load is applied in a vertical direction. THRUST LOAD - When bearing load is applied in a horizontal direction ANGULAR LOAD - When bearing load is applied in between vertical and horizontal

Radial Load Axial or thrust load Angular Load

Radial load

Angular load

BEARING TERMINOLOGY INNER RACE SEPARATOR OR CAGE ROLLING ELEMENTS BALLS ROLLERS OUTER RACE OR CUP

BEARING TYPES CYLINDRICAL BALL BEARING CYLINDRICAL ROLLER BEARING TAPERED ROLLER BEARING NEEDLE ROLLER BEARING

Cylindrical Ball bearings Radial loads only.. Can be double rows of ball bearings.. Installing bearing.. Press the outer race in a housing.. Press the inner race on a shaft..

HEAVY LOAD

Can be double rows of ball bearings For heavy thrust loads Can with stand thrust loads Can handle some axial loads

Some FWD use a double tapered bearing. Designed to handle radial and thrust loads. Usually not serviceable

FRONT WHEEL DRIVE

Cylindrical Roller Bearings Designed for Radial load Can withstand some thrust load

Tapered roller bearings Excellent capability to handle : Radial Loads Thrust Loads Angular Loads

NEEDLE ROLLER BEARING Is very compact Small steel rollers Thin outer race Used in steering gears and alternators Rollers push against each other For Radial Loads

TYPICAL DISC BRAKE BEARING ASSEMBLY

Bearing Diagnosis Normal bearing life Bearing failure

BEARING FAILURES BENT CAGE ETCHING BRINELLING ABRASIVE ROLLER WATER GALLING MUST REPLACE RACE AND BEARING AS A SET!!! SERVICE AND SYSTEMS LAB MANUAL PAGE 284, FIG 9-54

BEARING SERVICE Should use brass drift punch (286L) Should use bearing driver whenever possible (286C & 291L) Clean bearing and race Pack new grease in bearing (289C) Use high temp grease on disc brake equipped car. (265L)

Adjustment PAGE 291L

Springless seal

Double lip seal

Spring loaded Seal

Seal Replacement Different brands look different What is important is: Match the OD Match the ID Some brands have a steel lip and some do not. (Caution) The steel housing is very thin on some

Remember Not only does the seal need to look good now............ It need to be good enough for the next several thousand miles. Buying new seals are a cheap insurance