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Specifications: OD grinding length: 1,000 mm ID grinding length: 125 mm OD grinding diameter: 8 - 320 mm ID grinding diameter: 30 - 100 mm Center Height: 180 mm Workpiece weight: 150 kg Worktable speed: 0.1 - 4 m/min Wheel peripheral velocity: 38 m/s Max. travel of table: 1,100 mm Swivel range of worktable: -3°~+7°/-3°~+6°/-2°~+5°/-2°~+3° External wheel size diameter: 400 x 50 x 203 mm Spindle speed of headstock: 25 - 220 rpm ( Stepless ) Workhead center: MT4 Tailstock center: MT4 Wheel displacement per div. of handwheel: 0.01 mm ( rough ) /2.5 µm( fine ) Motor power: 9 KW Roundness: 2.5 µm OD /2.5 µm ID Surface Roughness: ra 0.32 µm OD/ 0.63 µm ID