Valve Seat Refacing Machine

for seat diameter 60 - 230mm 


   Valve seat diam. range 60 - 230mm
   Valve seat angle range 19,5° - 45°
Feed rates:  
   Rotary speed range 100 - 250 rpm
   Transverse feed 0,05mm/rev.
Power requirement:  
   Universal Input voltage range 100 - 300VAC
   1ph 50/60Hz
   Power input 0,5 kW
   Operating Voltage of Drive Unit max. 50 VDC
   Length 485mm
   Width 175mm
   Height 210mm
   Net weight approx. 18kg
  Alterations subject to change without prior notice



  • No abrasive dust. A fast clean cut.
  • Very short refacing time and fast set-up time.
  • Compact and handy design.
  • Modular add-on components provide a flexible
    solution for multiple projects.
  • No noise!
  • Powered by SELV (Safety Extra Low Voltage)
    to avoid risk of electrical shock.


The machine is fitted with two motors providing a smooth cutting action. The operating voltage supplied to the motors by a compact power supply unit is of the low voltage type to eliminate electric hazards.
The exchangeable adapter head with the built-in slideway for cutting tool travel ensures a precise seat angle eliminating faulty setting operations.
The speed of the motors is infinitely variable so that the cutting speed can be adapted to the diameter and material to be refaced.
The universal power supply unit is wired for connection to AC line voltages within a broad range of from 100 V to 300 V.
Roundness, concentricity and surface finish of the refaced valve seat are within manufacturers specifications or even better.
Facing adapter heads are available to convert the VD4E to a VD4HD-RC Refacing machine for refacing flat landing surfaces.
A cone refacing adapter head is available to convert the VD4E to a VD4HD/-30° Refacing machine for refacing the conical landing surface on valve seat cages.
A counterboring gear head is available to convert the VD4E to a VD4HD-ADM Counterboring machine for machine the valve seat ring bores for oversize seat ring installation.

The VD4 seat refacing gear unit, the seat refacing heads, pilots and supporting spiders supplied with our previous model VD4E valve refacing machine can be also used for the VD4HD.


First, lock the pilot with mounted centering spider in the valve guide.
Then, lower the VD4HD over the pilot and, using rapid traverse lever, position the cutting edge of the cutting tool in front of the inner edge of the valve seat.
Turn micrometer downfeed to set the desired depth of cut and then select the cutting speed.
Refacing is automatic.
Pressing one button is enough to start the refacing pass.

Scroll to Top