All Bidirectional thrust angular contact ball bearing (TAC series) Inner diameter 140-400 mm Rolling ball screw support bearing machine tool (open type) Inner diameter 15-60 mm Rolling ball screw support bearings for machine tools (contact seal type) Inner diameter 25-45 mm The inner diameter of the bearing used for ball screw support is 15-120 mm High speed thrust angle contact ball bearing (ROBUST series) inner diameter 50-200 mm