Wheel-dia 4.0 in., dp 2.0 in.Speed 4500 rpm; tool head travel 4.0 in. Max collet cap. 0.688 in. Max; 25.0 in. Lg by 22.5 in. Wd by 12.75 in. Ht o/a; motor-220/380/440 v, 3 phase or 110/220 v, single phase, 0.250 hp; 12 indexing positions w/360 degree rotation; collet for .25 in. Shank dia