Valve Grinding Machine Vg100

Centerline System is the only way to correct and align valve faces to that portion of the valve stem operating in the guide. Unless a valve is scientifically aligned, the valve face will be ground eccentric to its true center. A new valve is true and mechanically accurate in all its proportions.
The valve face and stem are concentric with the same centerline.
Warpina occurs only in that part of the valve that is subject to extreme heat - the portion above the guide and in the valve head. To correct a warped valve so it will function property when replaced in the engine, the valve face must be restored to concentricity with the portion of the stem that operates in the guide. The Centerline System assures this alignment and accuracy.