1-(used) Mattison Model 22-42 Rotary Surface Grinder, New 1978. SPECIFICATIONS: Diameter machine will grind to the center of.................. 42" Max. work height.............................................. 24" Magnetic chuck diameter....................................... 42" Chuck speeds........................................... 0 – 28 rpm Wheel diameter................................................ 22" Wheel down feeds (continuous)................... 0.005 – 0.165 ipm Feed wheel graduations.................................... 0.0001" Spindle motor................................... 75Hp/3/60/230/460 Weight (approx.)....................................... 21,500 lb. EQUIPPED WITH: 42" Magnetic chuck with 5/8" thickness Magna-Flux chuck control 22" Segmented wheel chuck Power wheel-head elevation Power wheel-head tilt Hydraulic chuck feed External coolant tank & pump Wheel dresser Rebuilt gear box and hydraulic pump http://www.agreenco.com/Mattison2242-2160.html