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II. ENGINE REBUILDING MACHINES  
Crankshaft grinding machine-MQ8260C

This crankshaft grinding machine is intended for using in automobiles, tractors,

diesel engines and their repair shops to grind journals and crankpins of crankshafts.

Features:
1) Four different work speeds are obtainable by making use of a double-speed
motor and the belts in the work head
2) Union chucks are used in the headstock and tailstock for an adjustable
eccentricity up to 120mm
3) Friction coupling is used in the headstock transmission chain for its easy
adjustment
4) Table traverse is operated either by hand or by power.
5) Rolling guide ways are used on wheel head, and made by high quality
material, the wheel spindle being of 80mm in diameter has good rigidity and
strength
6) The wheel spindle with 80mm diameter has good rigidity and strength
7) Plastic coated bed ways with less friction
8) The bed ways and wheel head ways are lubricated in automatic cycle by
means of oil pump
9) Additional synchronizer for headstock and tailstock: the gears of headstock
drive the tailstock to run in synchronism through the connecting spindle, thus
four different speeds are obtainable
10) The length of works is ranged from 800mm to 2,000mm
11) The digital display device can be optional

Specifications:

Model
MQ8260C
Max. work diameter × Max. length
Φ600×1600 mm
Capacity 
Max. swing over table
 Φ600
Work diameter ground
 Φ30 – Φ100 mm 
Throw of crankshaft
110mm
Max. work length ground 
In 3-jaw chuck
1400 mm
Between centres
1600 mm
Max. word weight
120Kg
Workhead
Centre height
300mm
Work speed (2 step)
25,45,85 r/min
Wheelhead 
Max. cross movement
185mm
Wheelhead rapid approach and with drawal
100 mm
Wheel feed per turn of cross feed handwheel
1 mm
Per grad. Of cross feed hand wheel
0.005 mm
Grinding wheel
Wheel spindle speed
740,890r/min
Wheel peripheral
25.6 – 35 m/sec
Wheel size (O.D. × Bore)
Φ900 × 232×Φ305
Table
Table travers per turn of handwheel
Coarse
5.88mm
 
Fine
1.68 mm
Overall capacity of motors
9.82 kw
Overall dimensions (L×W×H)
4166× 2037 × 1584mm
Weight
6000 kg

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