CNC External Grinding Machines Machining a variety of external faces of bearing inner rings and other components Grindable Work O.D. [Φmm] (*Option) Model TOG-15S CNC External Grinding Machine for small and medium diameter parts. (O.D. 10-160 on dia.) Learn more T-236CNC CNC External Grinding Machine for medium and large diameter parts. (O.D. 50-160 on dia.) Learn more T-237CNC CNC External Grinding Machine for large diameter parts. (O.D. 80-240 on dia.) Learn more