Crankshaft grinding machine MQ8260A/C

crankshaft grinding machine, crankshaft grinder MQ8260A/C

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.

·Four different work speeds are obtainable by making use of a double – speed motor and the belts in workhead.
·Union chucks are used in the headstock and tailstock for adjusting eccentricity up to 120 mm.
·Friction coupling is used in the headstock transmission chain for its easy adjustment.
·Table longitudinal traverse is operated either by hand or by power.
·Wheelhead rapid approach and withdrawal is effected by hydraulic means .
·Rolling guideways are used on wheelhead and made by high quality material . The wheel spindle being of 80 mm in diameter has good rigidity and strength.
·Plastic coated bed ways with less friction.
·The bed ways and wheelhead ways are lubricated in automatic cycle by means of oil pump.
·The digital display device can be optional.

• Main specifications

  Specifications			Model	MQ8260A		MQ8260A×20	MQ8260C		MQ8260C
  			Type	Φ580×1600	Φ580×1800	Φ580×2000	Φ600×1600		Φ600×1800
  Max.work swing diameter			mm	Φ580	Φ580	Φ580	Φ600		Φ600
  Max.work length			mm	1600	1800	2000	1600		1800
  Capacity	1.Max.swing over table		mm	Φ580	Φ580	Φ580	Φ600		Φ600
  	Work diameter ground with steady rest		mm	Φ30-Φ100	Φ30-Φ100	Φ50-Φ120	Φ30-Φ100		Φ30-Φ100
  	Throw of crankshart		mm	110	110	120	110		110
  	2.Max.work length ground:in 3 jaw chuck		mm	1400	1600	1800	1400		1800
  	Between centers		mm	1600	1800	2000	1600		1800
  	3.Max.work weight		kg	120	120	150	120		120
  Headstock	Center height		mm	300	300	300	300		300
  	Work speed		r/min	25,45,95	25,45,95	30,45,65,100	25,45,85		25,45,95
  Wheel head	1.Max.cross movement		mm	185	185	185	185		185
  	2.Wheel head rapid approach & withdrawal		mm	100	100	100	100		100
  	3.Wheel feed per turn of cross feed handwheel		mm	1	1	1	1		1
  	Per grad of cross feed handwheel		mm	0.005	0.005	0.005	0.005		0.005
  Grinding wheel	1.Wheel spindle speed		r/min	740,890	740,890	740,890	740,890		740,890
  	2.Wheel peripheral speed		m/sec	25.6-35	25.6-35	25.6-35	25.6-35		25.6-35
  	3.Wheel size(O.Dxwidthxbore)		mm	Φ900×32(20)×Φ305	Φ900×32(20)×Φ305	Φ900×32(20)×Φ305	Φ900×32(20)×Φ305		Φ900×32(20)×Φ305
  Table	1.Table traverse per turn of handwheel	Coarse	mm	5.88	5.88	5.88	5.88		5.88
  		Fine	mm	1.68	1.68	1.68	1.68		1.68
  	2.Table swivel(taper 18/100)			5′	5′	5′
  	3.Table swivelper grad of scale(taper 1:50)			10′	10′	10′
  Overall capacity of motors			kw	9.82	9.82	11.12	9.82		9.82
  Overall dimensions(L×W×H)			mm	4166×2037×1584	4166×2037×1584	4900×2037×1584	4166×2037×1584		4166×2037×1584
  Weight			kg	6000	6200	7000	6000		6500
  working accuracy	Ovality(new standard)		mm	0.005	0.005	0.005	0.005		0.005
  	Cylindricity		mm	0.01	0.01	0.01	0.01		0.01
  	Roughness Ra		um	Ra0.32	Ra0.32	Ra0.32	Ra0.32		Ra0.32

• Accessories
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