Valve Grinding Machine

for valves with stem diameter
up to 32,5mm


   Valve stem diam.      6 - 32,5mm
   Max. valve head diam. 200mm
   Valve seat angle 19°- 47°
Grinding spindle:  
   Grinding wheel diam.   175mm
   Speed at 50Hz 2790rpm
Work spindle  
   Speed at 50Hz 50rpm
   Option 5-60rpm
Coolant system:  
   Coolant capacity 5 liters
Power requirement:  
   Supply voltage 400V±10%
   (3ph 50/60Hz)          or 230V±10%
   Power input 0,5kW
   Length 800mm
   Width 550mm
   Height 450mm
   Net weight 155kg


Machine Base:
Heavily ribbed cast iron structure with integrated slideway for wheelhead. The machine base houses an industrial type flood pump for delivering coolant to the grinding site and a baffled coolant tank which can be drawn out for ease of cleaning.  

Box type monobloc casting noted for excellent vibration dampening. Permanently sealed and lubricated grinding spindle.
The wheelhead houses also the the control panel for the motors.

Workhead and Steady Rest:
Monobloc work spindle housing with permanently sealed and lubricated work spindle bearings. Work spindle fitted with collet chuck for use of high precision collets.
Workhead located on an elongated swivel plate provided with a wide-spaced scale for angular adjustment.
An unique selfcentering steady rest fits on the swivel plate for additional support of long stem valves.
Both the workhead and the steady rest are adjustable along the swivel plate to clamp each valve on that part of the valve stem which normally travels in the valve guide.
The combination of collet chucking and the unique Hunger steadying provides double support of long valves to ensure the ultimate in valve refacing accuracy.

Automated Oscillation
An oscillating equipment for automated power traverse of valve face across the grinding wheel is available as an option to ensure efficient stock removal and superior finish. The stroke of oscillation is infinitely adjustable. As the workhead table is mounted on guide bars to reduce friction, smooth traversing of the valve face across the grinding wheel is assured.

Dressing Attachment:
The dressing attachment is permanently mounted on the worktable for rapid wheel dressing.

Electrical System:
Individual grinding spindle motor, work spindle motor and coolant pump motor all controlled by switsches grouped in front of the wheelhead for ease of operation.

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