Ball bearings come with many specifications to explain their ideal function.
Ball bearings are rounded pieces of metal used for a vast amount of industrial applications. Essentially, their function is to provide smooth, low-friction movement to rotary-style parts; that is, parts that spin. Among the applications for ball bearings are auto-engine parts, electric motors that run home appliances, power tools, machine tools, conveyors, escalators, fans and pumps. Ball bearings actually come in a wide variety, but the industry does have some standard specifications you can use to tell them apart. Does this Spark an idea?
Radial Ball Bearings
Radial ball bearings are also called deep-groove ball bearings and are designed to take loads coming in the radial direction. They consist of an inner ring, an outer ring and balls in between the rings. Sometimes, they also have a cage that contains and separates the balls.
Angular Contact Ball Bearings
Angular contact ball bearings, as their name suggests, are designed to create an angle between the races and the balls while the bearing is in use. This angle is accomplished by having a thrust-load exert itself on the bearing while it is being assembled. The angle will vary from bearing to bearing.
Mast Guide Ball Bearings
Mast guide ball bearings are heavy ball bearings intended to be used with forklifts.
Thrust Ball Bearings
Thrust ball bearings are designed to carry weight being exerted down onto them, or "thrusted" onto them. They cannot handle very much radial load.
Slewing Ring Ball Bearings
Slewing ring ball bearings, also called turntables ball bearings, can handle radial, axial or moment loads. They are designed to mount directly onto a seating surface. These may also be called tabletop bearings.
Bore Size
Bore size is a standard specification for ball bearings that have bores with diameters that can be measured metrically. For hexagonal bores, measure across the flats to get the bore size. In the event the bore is tapered, measure the smaller diameter to get the bore size.
ABEC Rating
The Annular Bearing Engineers' Committee, or ABEC, rating of a ball bearing measures the accuracy and tolerance level for the bearing.
Dynamic Loads
The dynamic load of a bearing comes in two subtypes, the dynamic axial load and the dynamic radial load. This rating tells you how much constant load a bearing will be able to tolerate for 1,000,000 revolutions of the inner ring.
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