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The crankshaft grinder model MQ8260C is modified on the basis of the Model MQ8260A and intended for use in the automobiles, tractors diesel engine works and their repaire shops to grind the journals and crankpins of crankshaft. 1.Three different work speeds are obtainable by making use of the belts in the work head. The cover can be opened so that the belts can be changed conveniently. 2.Cross swallow-tailed chucks are selectively used in the headstock and tailstock. 3.Friction coupling is used in the headstock transmission chain for its easy adjustment. 4.Single layer table, with an oblique angle of 10 degree, longitudinal traverse can be operated either by hand or by power. 5.Wheel head rapid approach and withdrawal effeced by hydraulic means can be digitally displayed at a resolution of 0.005mm. 6.The wheel spindle being of 80mm in diameter has good rigidity and strength 7.The roller ways are for wheel head movement 8.The bed ways and wheel head ways are lubricated in an automatic cycle by means of the oil pump. 9.Plastic coat is adhered to the bed way. 10.Air cushion can be used on the tailstock providing easy adjustment. Crosswise movement of tailstock is effected.Model MQ 8260C × 1600 MQ 8260C × 1800 Max. work diameter × Max. length Φ600× 1600 mm Φ600× 1800 mm Capacity Max. swing over table Φ 600 m Work diameter ground with steady rest Φ30× 100 mm Throw of crankshaft 110 mm Max. work length ground in 3 jaw chuck 1400 mm 1600 mm Max. work length ground between centers 1600 mm 1800 mm Max. work weight 120 kg Headstock Center height 300 mm Work speed (rpm) 25,45,95 wheelhead Max. cross movement 185 mm Wheelhead rapid approach & withdrawal 100 mm Wheelhead feed per turn of cross feed handwheel 1 mm Wheel feed per grad of cross feed handwheel 0.005 mm Grinding wheel Wheel spindle speed 740, 890 rpm Wheel peripheral speed 25.6~ 35 m /sec Wheel size Φ900x32xΦ 305 mm Table Table traverse per turn of handwheel coarst 5.88 mm Table traverse per turn of handwheel fine 1.68 mm Table swivel (taper 18/100) 5° Table swivel per grad of scale (taper 1:50 ) 10’ Overall capacity of motor 9.82 kw Overall dimension (LxWxH) (mm) 4166x2037x1584 Packing dimension (LxWxH) (mm) 4300x2200x2000 Weight 6000 kg 6200 kg Working accuracy Ovality new standard 0.005 Cylindricity 0.01 Roughness Ra 0.32 Ra 0.32
