1-TECHNICA ZSM 5100-815 CNC CENTER HOLE GRINDER SERIAL NUMBER J20868 DATE OF MFG. 1999 STK#104107================================SPECIFICATIONS WHILE OBTAINED FROM SOURCES DEEMED RELIABLE ARE SUBJECT CHANGE WITHOUT NOTICE AND TO VERIFICATION BY BUYER: Max. Workpiece Length 43"Minimum Workpiece Length 2"Workpiece Diameter .315 - 4.92"Max. Workpiece Weight 264 lbsCone Angle of Ground Center Holes 60 deg.Diameter of Center Holes Ground.079 - 1.97"Grinding Spindle Speeds(3) 4500 / 22500 / 13000 RPMHollow Quill Speed (Planetary Axis) 400 RPMTravel of Grinding Cone .030" - .197"Approx Dimensions 22" x 22" x 73"HApprox. Weight 1300 lbsFLAT PANEL CONTROL