China Crankshaft Grinding Machine

MQ8260A crankshaft grinding machine is intended for use in automobile, tractor and diesel engine repairing shops to regrind the crankpins and journals of crandshafts. Wheelhead rapid approach and withdrawal is hydraulically effected, the worktable is operated approached either by hand or by power. Power table traverse, either left or right, is momentily actuated by depressing and releasing the electric push button in connection with the desired direction. This arrangement facilitates table spacing for the grinding of the next journal or crankpin.
1. Four different work speeds are obtainable by making use of a double - speed motor and the belts in workhead.
2. Union chucks are used in the headstock and tailstock for adjusting eccentricity up to 120 mm.
3. Friction coupling is used in the headstock transmission chain for its easy adjustment.
4. Table longitudinal traverse is operated either by hand or by power.
5. Wheelhead rapid approach and withdrawal is effected by hydraulic means.
6. Rolling guideways are used on wheelhead and made by high quality material. The wheel spindle being of 80 mm in
7. Diameter has good rigidity and strength.
8. Plastic coated bed ways with less friction.
9. The bed ways and wheelhead ways are lubricated in automatic cycle by means of oil pump.
10. The digital display device can be optional.
Model
MQ 8260A x 1600
MQ 8260A x 1800
MQ 8260A x 2000
Max. work diameter x Max. length
Φ600x 1600 mm
Φ600x 1800 mm
Φ600x 2000 mm
Capacity
Max. swing over table
Φ 600 m
Work diameter ground with steady rest
Φ30x 100 mm
Φ50x 120 mm
Throw of crankshaft
110 mm
120 mm
Max. work length ground in 3 jaw chuck
1400 mm
1600 mm
1800 mm
Max. work length ground between centers
1600 mm
1800 mm
2000 mm
Max. work weight
120 kg
150 kg
Headstock
Center height
300 mm
Work speed (rpm)
25,45,95
30,45,65,100
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
11.2 kw
Overall dimensions (LxWxH) (mm)
4166x2037x1584
4900x2037x1584
Packing dimensions (LxWxH) (mm)
4300x2200x2000
5300x2200x2000
Weight
6000 kg
6200 kg
7000 kg
Working
accuracy
Ovality new standard
0.005
Cylindricity
0.01
0.01
0.01
Roughness
Ra 0.32
Ra 0.32
Ra 0.32