CrankShaft Grinding machine
The crankshaft grinder Model MQ8260A is modified on the base of the Model Model Mq8260 and intended for use in the automobile. Tractor, diesel engine works and their repair shops to grind the journals and crankpins of crankshafts
Three different work speeds are obtainable by making use of the belts in the workhead.
Cross chucks are used in the headstock and tailstock.
Friction coupling is used in the headstock transmission chain for its easy adjustment.
Table traverse is operated either by hand or by power.
Wheelhead rapid approach and withdrawal is effected through hydraulic means.
The wheel spindle being of 80mm in diameter has good rigidity and strength.
Use is made of roller ways for wheelhead movement.
The bed ways and wheelhead are lubricated in an automatic cycle by means of the oil pump.
| Model | MQ8260Ax16 | MQ8260Ax 18 | MQ8260Ax20 |
|---|---|---|---|
| Max. work diameter × Max. length | Φ580×1600 mm | Φ580×1800 mm | Φ580×2000 mm |
| Max. swing over table | 580 mm | 580 mm | 580 mm |
| Work diameter ground | Φ30×100 mm | Φ30×100 mm | Φ50×120 mm |
| Throw of crankshaft | 110mm | 110mm | 120mm |
| Max. work length ground in 3 jaw chuck | 1400mm | 1600mm | 1800mm |
| Max. work length ground between centres | 1600mm | 1800mm | 2000mm |
| Max. work weight | 120kg | 120kg | 150kg |
| Centre height | 300mm | 300mm | 300mm |
| Work speed (rpm) | 254595 | 254595 | 254595100 |
| Max. cross movement | 185mm | 185mm | 185mm |
| Wheelhead rapid approach & withdrawal | 100mm | 100mm | 100mm |
| Wheelhead feed per turn of cross feed handwheel | 1mm | 1mm | 1mm |
| Wheel feed per grad of cross feed handwheel | 0.005 mm | 0.005 mm | 0.005 mm |
| Wheel spindle speed | 740, 890 rpm | 740, 890 rpm | 740, 890 rpm |
| Wheel peripheral speed | 25.6 – 35 m/sec | 25.6 – 35 m/sec | 25.6 – 35 m/sec |
| Wheel size | Φ900x32xΦ305 mm | Φ900x32xΦ305 mm | Φ900x32xΦ305 mm |
| Table traverse per turn of handwheel coarst | 5.88mm | 5.88mm | 5.88mm |
| Table traverse per turn of handwheel fine | 1.68mm | 1.68mm | 1.68mm |
| Table swivel (taper18/100) | 5° | 5° | 5° |
| Table swivel per grad of scale (taper 1:50) | 10’ | 10’ | 10’ |
