Single Direction 51100 Thrust Ball Bearing

 Thrust bearings are designed for pure thrust loads, and can handle little or no radial load. The rolling element in a thrust bearing can be a ball, needle or roller.  Design units can be specified in English units of inches, metric units or both.Important dimensions to consider when searching for thrust bearings include the bore, the outside diameter and the overall width.  The bearing industry uses a standard number system for bearings with metric diameter bores.  For bore sizes 04 and up multiply by 5 to obtain the bore in millimeters. If the bore is a hex this refers to the dimension across the flats.  If the bore is tapered this refers to the smaller diameter.  The outside diameter of the bearing includes the housing if it is a housed unit, but exclude the flange if a flanged bearing.

Important operating specifications to consider when searching for thrust bearings include rated speed, static axial or thrust load, and dynamic axial or thrust load.  The rated speed for a bearing running with grease lubrication is lower than a bearing with oil lubrication.  The static axial or thrust load is the maximum axial load bearing can endure without excessive permanent deformation.  The dynamic axial or thrust load is the calculated constant axial load, which a group of identical bearings with stationary outer rings can theoretically endure for a rating life of 1 million revolutions of the inner ring.

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