Max. internal grinding diameter: 20 mm. Centre height: 60 mm. Distance between centres: 150 mm. number (steps): 3. from: 6000 t/min. up to: 9000 t/min. Spindle hole: 12 mm. Taper in spindle:: 12 W. Rotatable grinding spindle head (b-axis): +45 / -45 °. Voltage 50 Hz 3x: 380 Volt. Machine's weight about: 250 kg. Length: 900 mm. Width: 750 mm. Height: 1300 mm. 3-jaw chuck diameter: mm. Set of collets: W 12.