With CNC and MDI controlled options, Okamoto's lineup of internal diameter grinding machines are built for rigidity, power, and long-term precision. Okatmoto's internal grinders features I.D., O.D., straight, taper, face, and multi-step grinding capabiltiies. The lathe-like structure allows an I.D. ranging from 0.24" to 8", a 24" swing over table, and an 850 rpm workhead spindle.