Thrust bearings are used at the same time as four-row cylindrical roller bearings to bear axial loads, and in order to avoid radial loads on such bearings, a large gap is usually left between the outer diameter of the bearing and the housing bore. In order to avoid the damage of the roll surface caused by the relative movement of the inner ring and the roller neck of loose fit, the end face of the inner ring of the bearing is processed with a stop keyway, and in order to avoid the relative motion of the outer ring and the bearing seat, the end face or outer diameter of the outer ring of the bearing is also processed with a stop groove.
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