The VD4E/-30° can be used for refacing the external conical landing face on valve cages.
Max. refacing diameter 250mm
Angle of transverse feed -30°
Drive unit and gear head of the VD4E/-30° are identical with the drive unit and gear gear head of the VD4E Valve Seat Grinding Machine.
If a VD4E is already on hand, only the D4/-30° adapter head is required for for refacing the external conical landing face on valve cages.
The D4/-30° adapter head is bolted to the gear head in place of the seat refacing adapter head.
The pilot used for valve seat refacing can be also used for centering the VD4E/-30°.