Product Description:
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.
Features
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.
| Parameters |
| Model |
MQ8260A×1600 |
MQ8260A×1800 |
MQ8260A×2000 |
| Max. work diameter × Max. length |
Φ600×1600 mm |
Φ600×1800 mm |
Φ600×2000 mm |
| Capacity |
Max. swing over table |
Φ600 m |
| Work diameter ground with steady rest |
Φ30×100 mm |
Φ50×120 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 |
Φ900x32xΦ305 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 |
Audited Supplier 
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