VR12 – Valve Refacing Machine with Centerless Grinding ...
Rottler''s Centerless Grinding System rotates the valve stem on it''s own centerline. Precision drive rollers rotate the valve stem and a pneumatic low friction steady rest support the valve stem similar to a precision balancing machine, resulting in extremely accurate valve stem to valve seat run out less than .0002″ (.005mm) TIR.