These letters usually designate a ball-bearing supported crankshaft This makes the engine run smoother and last longer
Used when high shaft load (radial or axial thrust load) capacity is required Ball bearings are usually used in industrial and agricultural motors Occasionally, roller bearings may be used on larger horsepower motors for maximum radial load capacity
bearings are grease lubricated Most are sealed and do not need any lubrication service Some, however, come with grease cups and can be lubricated with a grease gun Motors that use ball bearings when new are supplied with enough grease in the bearings to lubricate them for a number of months A small amount of grease should be added every tow-three months Use a high grade grease on fully enclosed motors Too much grease may cause the bearings to overheat
A ball bearing is a type of bearing in which the turning part is connected to the non-turning part only by balls that roll between the two parts Ball bearings are used in bicycle bottom brackets, freewheels, headsets, and hubs They are also occasionally used in derailer pulleys and brake calipers
Ball bearings are small metal balls placed between the moving parts of a machine to make the parts move smoothly. One of the two types of rolling, or antifriction, bearings (the other is the roller bearing). Its function is to connect two machine members that move relative to one another so that the frictional resistance to motion is minimal. In many applications, one of the members is a rotating shaft and the other a fixed housing. Each ball bearing has three main parts: two grooved, ringlike races and a number of balls. The balls fill the space between the two races and roll with negligible friction in the grooves. The balls may be loosely restrained and separated by means of a retainer or cage