Work feeder for roller end face working machine, roller end face working machine and rollers for roller bearing

A workpiece feeder for roller end face processing, comprising:

• a carrier ring having a plurality of recesses arranged in a radially-inner surface thereof at a predetermined pitch along a circumferential direction;
• a regulating wheel fitted into the carrier ring to form roller fitting cavities between a radially-outer surface of the regulating wheel and the plurality of recesses;
• a carrier support for supporting the carrier ring on a radially-outer side with respect to the plurality of recesses;
• and
• rotational force applying means for applying a rotational force to the carrier ring on the radially-outer side with respect to the plurality of recesses,
• wherein, into each of the roller fitting cavities, a roller is fitted so that end faces of the roller are exposed to an outside with an axial direction of the roller being in parallel to an axial direction of the carrier ring, and
• wherein the plurality of recesses each comprise an elastic member arranged therein, the elastic member being elastically brought into contact with a radially-outer surface of the roller to restrain a posture of the roller.