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Crankshaft Grinder M8260x3000

Dimension and weight

Net weight:  14000kg

Overall dimension of the machine: 9650x2400x1950mm (LxWxH)

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The machine is controlled mainly by hand, partly by electric (headstock and tailstock in synchronization by servo motors) hydraulic control(wheel head) 
Specialized chucks are offered for clamping of work piece, which can be removed and replaced with centers according to different length. The longitudinal traverse of work table can be controlled either by hand or by automatic, and the cross traverse of wheel head can be controlled either by hand or by hydraulic.   With hydraulic system and electric linkage structure adopted on the wheel head, safety can be guaranteed when operate miss occurs during the grinding or adjusting process. A protective shield is equipped above the wheel head and a rapid driving-and-reversing mechanism is used on the wheel head, too.  
The headstock and tailstock is in synchronization by employing FAGOR CNC control system by Spain and YASKAWA servo motor by Japan, under which the work piece revolves. Timing belt pulley and anti-backlash gear guarantee an accurate transmission ratio. A separated electric cabinet is adopted.
The wheel spindle, framed in telescopic construction, is driven by motor rested on wheel head through belt pulleys and triangular belt. Hydrostatic bearings by domestic makers are adopted on the wheel spindle. Separated oil system and accommodation oil tank as well as air-cooled device are employed on this machine. 
 
A set rule for work table is optical grating scale with 3000mm in length. 
 
Model M8260x3000 
Main specifications maximum swing over bed  Ф600mm
maximum length of workpiece  3000mm
centre height    320mm
diameter able to grind with steady rest  170mm (maximum) 50mm (minimum) 
centre distance     3000mm
chuck distance     2800mm
throw of pin       120mm
maximum weight of workpiece  600kg
speed of work spindle    25-90r/min (stepless)
taper of center for headstock    metric tape 80
 taper of center for tailstock     metric tape 80 
Work table table traverse per hand wheel revolution 5.88 (coarse)1.68 (fine) 
maximum amount of longitudinal movement 3000mm (manual operation)           3000mm (engine driven)
Grinding carriage wheel size 900x65x305mm (maximum) 650x65x305mm (minimum) 
speed of wheel spindle  890r/min (maximum), 740r/min (minimum)
maximum traverse of grinding carriage     185mm
rapid advance-and-retreat of grinding carriage  260mm
adjustment range between grinding carriage and bench hook 80mm (forward)    100mm (backward)
cross feed per hand wheel revolution  1mm
cross feed per hand wheel division     0.005mm
wheel peripheral speed              35m/s 
Hydraulic system pressure range for mail oil way  0.9-1.1Mpa
Pressure range for lubrication circuit  0.2-0.3 Mpa
rate of flow of pump  15L/min
pressure of oil pump  2.5Mpa
coolant system rate of flow of cooling pump     100L/min 
Motor powers of the machine motor power of grinding wheel    15KW
motor power of headstock and tailstock  2x7.5KW (SGMGH, Japan)
motor power of oil pump    0.55KW
motor power of cooling pump  3KW
motor power of work table    3KW 
overall dimension of the machine 9650x2400x1950mm (LxWxH)
net weight  14000kg
 Working accuracy roundness      0.09mm (0.018mm in diameter)
(in longitudinal section) conformity error between crank arm journals  0.012mm
surface roughness     0.32μm
surface waviness      1.6μm

Main Accessories

1. Jaw chucks       2sets
2. Wheel dresser   1set
3. Steady rest       1set
4. Wheel balancing arbor(Φ80)    1set
5. Leveling wedge 11set
6. Driving dog       1set
7. Vertical aligning stand      1set
8. Horizontal aligning stand 1set
 
1. Wheel Balancing stand HJX-85-04 1set
2. Hanging measuring device      1set
3. End dresser      1set
4. Centering device       1set
5. Digital display scale 1set
6. Digital display devices     1set

 

 

Main Accessories

1. Jaw chucks       2sets
2. Wheel dresser   1set
3. Steady rest       1set
4. Wheel balancing arbor(Φ80)    1set
5. Leveling wedge 11set
6. Driving dog       1set
7. Vertical aligning stand      1set
8. Horizontal aligning stand 1set
 
1. Wheel Balancing stand HJX-85-04 1set
2. Hanging measuring device      1set
3. End dresser      1set
4. Centering device       1set
5. Digital display scale 1set
6. Digital display devices     1set

 

 

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