Item Description
 

Crankshaft Grinder Model MQ8260C is modified on the basis of the Model MQ8260A and intended for use in the automobiles tractors diesel engine works and their repair ships to grind the journals and crankpins of crankshafts.

Features:
 

1.Three different work speeds are obtainable by the use of the belts in the work head.The cover of headstock can be opened so that the belts can be changed conveniently.

2.Cross swallow-tailed chucks are used in the headstock and tailstock.

3.Friction coupling is used in the headstock transmission chain for its easy adjustment.

4.Singlelayer table,with an oblique angle of 10 degree,longitudinal traverse can be operated either by hand or by power.

5.Wheel head rapid approach and withdrawal effected by hydraulic means can be digitally be digitally displayed at a resolution of 0.005mm.

6.The wheel spindle of 80mm in diameter has good rigidity and strength.

7.The roller ways are for wheelhead movement.

8.The bed ways and wheelhead ways are lubricated in an automatic cycle by means of the oil pump.Plastic coat is adhered to the bed way. 

9.Air cushion can be used on the tail stock providing easy adjustment ,crosswise movement.       

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