Main Application and Features
Model MQ8260B crankshaft is simple in construction, easy in operation and wide in application; suitable for grinding the crankshaft pins and journals. It can also be used as cylindrical grinder.
Left and right chucks are crisscross and adjustable.
Workpiece is held by centers or by chucks, driven by workhead motor, and fed by hand for grinding.
The machine is controlled by mechanical, electric and hydraulic means; operated mainly by hand.
Longitudinal worktable travel is realized by manual-drive or motor-drive, with the motor-drive for jump displacement or adjustment.
Max. adjustable amount of left and right chucks is 110mm in vertical direction.
Workpiece, wheel, worktable, coolant pump and oil pump are driven by their individual motors.
Worktable and wheelhead have the hydraulic and electric interlocking mechanism, ensuring the safety even if misoperation whether in adjustment or in the process of grinding.
Main Specifications and Main Technical Parameters
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Max. swing dia. over table
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580 mm
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Max. crankpin throw
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110 mm
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Grinding diameter supported by steady-rest
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30~100 mm
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Grinding cylindrical diameter
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30~200 mm
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Max. grinding length (clamped by 3-jaw chuck)
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1300 mm
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Max. grinding length (clamped by centers)
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1600 mm
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Max. workpiece weight
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120 kg
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Center height
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30 mm
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Workhead spindle speed (three steps)
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25,50,100 r/min
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Wheelhead spindle speed
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760 r/min
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Max. wheelhead travel along leadscrew
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200 mm
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Wheelhead displacement per rev. of feed handwheel
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1 mm
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Wheelhead displacement per div. of feed handwheel
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0.005 mm
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Rapid wheelhead advance/withdrawal
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100 mm
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Max. longitudinal worktable travel
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1600 mm
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Oil-pump flow-rate
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11 ml/r
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Oil-pump pressure
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6.3 map
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Coolant pump flow-rate
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50 l/min
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Total motor power
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9.45 kw
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Machine weight
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6700 kg
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Overall dimensions (L×W×H)
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4000×2100×6130 mm
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Working accuracy
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Roundness
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5μm
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Surface roughness
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Ra0.32μm
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