1. BEARINGS Suported by

2. Introduction Different types of bearing are used extensively throughout our machines to join stationary part to a moving part. Suported by

3. Bearing Functions  Decrease heat, friction and wear  Support static weight  Support radial and thrust loads  Allow tighter fit tolerances  Easier replacement Suported by

4. Types of Bearings 1.Plain bearings:  Shaft runs directly on the bearing 2.Anti-friction bearings:  Balls or rollers as part of the bearing Suported by

5. Sleeve Bearings/Bushings Sleeve bearings are plain bearings, in the form of a sleeve, which are pressed into holes bored in castings or other parts. Some sleeve bearings consist of a steel tubular backing with an antifriction metal lining. Suported by

6. Split-half Bearings Two (2) split-half bearings make one complete bearing. Most splithalf bearings that are used in engines have an oil hole and/or groove in the top half of the bearing. Suported by

7. Ball Bearings The primary purpose of ball bearings is to support a load and to keep friction, heat, and wear to a minimum during the rotation of different parts at high speeds. Outer Race Balls Cage Inner Race Balls Types of ball bearings Suported by

8. Roller Bearings Three basic types:  Straight roller bearings  Needle roller bearings  Tapered roller bearings Suported by

9. Straight Roller Bearings The basic difference between a straight roller bearing and a ball bearing is that instead of a round steel ball, the straight roller bearing has a cylinder shape solid steel roller. The primary purpose of straight roller bearings is to help the reduction of friction, heat, and wear during the rotation of different parts at high speeds. Suported by

10. Needle Thrust Bearings A needle thrust bearing has its needles mounted radially in a washer-type retainer. It is, in fact, used as a thrust washer. It can be installed on a shaft between two hardened surfaces to take the thrust load between parts,or used in a hardened steel washer on each side. Suported by

11. Tapered Roller Bearings Tapered roller bearings can be separated into two parts; the inner race, complete with rollers and retainer, is known as the cone, and the outer race is call the cup Suported by

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