Min. internal grinding diameter: 1 mm. Max. internal grinding diameter: 20 mm. Grinding depth: 100 mm. Centre height: 60 mm. Distance between centres: 150 mm. number (steps): 3. from: 90000 t/min. up to: 120000 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. Automatic internal grinding support: AMI 25. Set of collets: W 12.