Min. internal grinding diameter: 1 mm. Max. internal grinding diameter: 30 mm. Grinding depth: 1 - 100 mm. Centre height: 185 mm. Distance between centres: 200 mm. number (steps): 3. from: 30000 t/min. up to: 5 m/min. Spindle hole: 20 mm. Taper in spindle:: 25 W. min.: 1 mm. max: 100 mm. Voltage 50 Hz 3x: 380 Volt. Machine's weight about: 610 kg. Length: 1450 mm. Width: 760 mm. Height: 1600 mm.