Crank shaft grinding machine MQ8260A,MQ8260C
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Main features:
1. Three different work speeds areobtainable by making use of the belts in the headstock.
2. Cross chucks are used in theheadstock and tailstock.
3. Friction coupling is used inthe headstock transmission chain for its easy adjustment.
4. Table traverse is operatedeither by hand or by power.
5. Wheelhead rapid approach andwithdrawal is effected through hydraulic means.
6. The wheel spindle being of 80mmin diameter has good rigidity and strength.
7. Use is made of roller ways forwheelhead movement.
8. The bed ways and wheelhead arelubricated in an automatic cycle by means of the oil pump.
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Product Description
Differences of MQ8260A and MQ8260C:
1. Table surface
Model A ---a flat table surface
Model C----an oblique table surface (10 degree),So model C leads to an easy flow of coolant liquid and fast removal of steel chips.
2. Table structure
Model A---one-layer table, good rigidity, but more time when adjusting taper
Model C---double-layer table, less rigidity, but less time when adjusting taper
3. Chuck structure
Model A---dovetail type chucks on headstock and tailstock
Model C---flat type chucks on headstock and tailstock
| Model | UMQ8260A | UMQ8260AX18 | UMQ8260AX20 | UMQ8260C | UMQ8260CX18 |
| Max. Work swing diameter × Max work length | 580×1600mm | 580×1800mm | 580×2000mm | 600×1600mm | 600×1800mm |
| Capacity | |||||
| Max. Swing over table | 580mm | 580mm | 580mm | 600mm | 600 |
| Work diameter ground with steady rest | 30~100mm | 30~100mm | 50~120mm | 30~100mm | 30~110 |
| Throw of crankshaft | 110mm | 110mm | 120mm | 110mm | 110 |
| Max. work length ground | |||||
| In 3-jaw chuck | 1400mm | 1600mm | 1800mm | 1400mm | 1600 |
| Between centers | 1600mm | 1800mm | 2000mm | 1600mm | 1800 |
| Max. work weight | 120kg | 120kg | 150kg | 120kg | 120 |
| Work head | |||||
| Center height | 300mm | 300mm | 300mm | 300mm | 300 |
| Work speed | 25,45,95r/min | 25,45,95r/min | 30,45,65,100r/min | 25、45、95r/min | 25、45、95r/min |
| Wheel head | |||||
| Max. Cross movement | 185mm | 185mm | 185mm | 185mm(85mm Opted) | 185mm(85mm Opted) |
| Wheel head rapid approach and withdrawal | 100mm | 100mm | 100mm | 100mm(200mm Opted) | 200mm |
| Wheel feed per turnoff cross fed hand wheel | 1mm | 1mm | 1mm | 1mm | 1mm |
| Per grad. of cross feed hand wheel | 0.005mm | 0.005mm | 0.005mm | 0.005mm | 0.005mm |
| Grinding wheel | |||||
| Wheel spindle speed (2steps) | 740.890r/min | 740.890r/min | 740.890r/min | 740.890r/min | 740.890r/min |
| Wheel peripheral speed | 25.6-35m/sec | 25.6-35m/sec | 25.6-35m/sec | 25.6-35m/sec | 25.6-35m/sec |
| Wheel size (O. D .× width ×Bore) | Φ900×32×Φ305mm | Φ900×32×Φ305mm | Φ900×32×Φ305mm | Φ900×32×Φ305mm | Φ900×32×Φ305mm |
| Table | |||||
| Table traverse per turn of hand wheel coarse | 5.88mm | 5.88mm | 5.88mm | 5.88mm | 5.88mm |
| Fine | 1.68mm | 1.68mm | 1.68mm | 1.68mm | 1.68mm |
| Table Swivel (taper 18/100) | 5° | 5° | 5° | ||
| Table Swivel per grad of scale (taper 1:50) | 10′ | 10′ | 10′ | ||
| Overall capacity of motors | 9.82kw | 9.82kw | 11.12kw | 9.82kw | 9.82kw |
| Overall dimensions (L×W×H) | 4166×2037×1584 | 4166×2037×1584 | 4900×2037×1584 | 4166×2037×1584 | 4166×2037×1584 |
| Weight | Approx. 6000kg | Approx. 6000kg | Approx. 6000kg | Approx . 6000kg | Approx . 6000kg |
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