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Engine Rebuilding Equipment - Automotive Equipment - Machine Shop Equipment
Rottler VR12 Valve Refacer
Rottler's Centerless Grinding System is able to grind a set of valves to exact same length without adjusting settings. The Centerless 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. The Rottler Centerless System allows a wide range of valve stem diameters to be ground without changing any collets or chucks.
Stroking Handwheel - The new design stroking handwheel moves the valve back and forth over the grinding wheel. When operator's hand is removed from the stroking handwheel, the stroking system remains in position until the operator moves the handwheel again.
Digital Valve Face Angle
Digital display shows exact valve face angle
and is easily adjusted by one locking handle
from 10 to 60 degrees.
The VR12 sets new standards for Performance
Racing and Remanufacturing work. The
Centerless Technology eliminates collets and
chucks. Valve face is machined concentric
to the valve stem for improved sealing,
better heat transfer and reduced mechanical
stresses on valves
The VR12 is supplied standard with vitrified
wheels, grinding oil and diamond dresser.
CBN wheels are optional and must be ordered
separately. Special wheels available for
grinding difficult metals such as Titanium,