Bearings

Bearings While all bearings are intended to reduce friction they are generally categorized as either: Anti-Friction Rolling Element Bearings Friction Plain Bearings

Bearings The primary purpose of a Bearing is to carry a load in either one of two directions:

Bearings Some Bearings are subjected to a combination of the two directions:

Bearings Plain Bearings Types Bushes Headed Bushes

Bearings Plain Bearings Types Sleeve Low Friction Lining attached to a steel, cast iron or bronze back or shell Split Sleeve, Precision Insert or Slipper

Bearings Plain Thrust Bearings Step or Pivot Collar Thrust Tilting Pad

Bearings Advantages of Plain Bearings For Dynamic Applications: The housings for plain bearings can be of smaller diameter Any possible centrifugal problems connected with ball and rollers can be eliminated

Bearings Advantages of Plain Bearings If assembly is difficult: Plain bearings may be designed in two (2) halves and bolted together, to permit insertion of the shaft

Bearings Advantages of Plain Bearings To Withstand Shock Loads: Plain bearings have a resilient oil film so that they are not sensitive to wide clearances Plain bearings are not prone to “bump” Plain bearings are silent in operation

Bearings Advantages of Plain Bearings For Heavy Duty Loads: Plain bearings have a high thermal conductivity Plain bearings permit controlled distribution of oil under pressure for lubrication and cooling

Bearings Advantages of Plain Bearings Long Life Free From Breakdown : Plain bearings are not sensitive to Corrosion by damp Fatigue Breakage of balls and rollers by high local pressures due to entry of grit

Each is named for the type of rolling element it employs. Bearings There are five basic types of anti-friction bearings: Tapered Needle Ball Spherical Cylindrical Each is named for the type of rolling element it employs.

Tapered Rollers

Needle Rollers

Ball

Spherical Roller

Cylindrical Roller