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The grinder is designed for external diameter, external conical surface, internal bore and endface of the medium-small workpiece. 1.The worktable, workhead and wheelhead are all able to be swiveled for adequate angle. 2.The workhead adopt mechanical step speed-adjustment (six step) 3.The worktable and wheelhead can be operated hydraulically and manually.Model M 1420A Grinding diameters 8~200mm Grinding bore 13~80mm Max. grinding length 500/ 750mm Max. grinding depth 125mm Max. grinding depth 600/ 800mm Hydraulic traverse speeds 0.1~4m /min Swivel range of the table -5 °~ +9 ° / -3 °~ +9 ° Max. peripheral speed of grinding wheel 35m /s Ma.x grinding wheel diameter 300mm Speeds of headstock spindle 60, 85, 230, 120, 170, 460 r/min Coolant pump drive motor ( 500mm / 750mm ) 4.24kw Overall dimensions ( 500mm / 750mm ) (mm) 2700x1420x1600 / 2000x1420x1600 Weight of machine ( 500mm / 750mm ) 2100/2600kgs Working accuracy Circularity of external diameter 0.0015mm Circularity of internal diameter 0.0025mm Cylindricity of external diameter 0.005mm Surface roughness of external diameter Ra 0.32 μ m Surface roughness of internal diameter Ra 0.63 μ m
