Thread Grinding machine REISHAUER NRK Diameter of threads 3- 200 mm Center distance 700 mm Threading length 450 mm Thread pitch 0,3 - 80 mm Helix angle 25 Grinding wheel diam. min/max. 350-275 mm Wheel width 3,5 - 40 mm Speed range of workpiece, 18 steps 1 - 48 rpm Grinding wheel speed 1550-1900 rpm 380V / 50 Hz , 5.5 (7.5) kW gross weight ...