IR 17X21X16 Inner ring

The standard inner ring of an SKF needle bearing is slightly beveled on the outside on both sides (IR). IR inner rings are also available with a readymade lubrication hole (IS1). LR inner rings have a chamfer on both sides of the inside. Inner rings are installed on axles with needle roller cages, cylindrical roller rings, and open and closed end drawn cup needle roller bearings. Wide inner rings are suitable as sliding surfaces for abrasive seals and for bearings with large axial displacements.