The VR8 sets new standards for Performance Racing and remanufacturing work. The Centerless Technologyeliminates collets and chucks. Valve face is machined concentric to the valve stem for improved sealing, better heat transfer and reduces mechanical stresses on valves.
Variable Valve Rotation Speed
allows the operator to adjust surface speed for different diameter valves for best surface finish for a wide range of valve head diameters from small multi valve to large diesel valves.
Variable Wheel Rotation Speed
The Main And Stem/Butt End wheels are variable and are easily adjusted on the control panel to allow different surface speed for different diameter valves for best surface finish
for a wide range of valve head diameters from small multi valve to large diesel and gas valves
VR8 Centerless Valve Refacer
Digital Valve Face Angle
Digital display shows exact valve face
angle and is easily adjusted by one
locking handle from 10 to 50 degrees.
Adjustable Coolant Supply directs
grinding coolant directly at
the grinding face
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. The Rottler Centerless System allows a wide range of valve stem diameters to be ground without changing any collets or chucks.
Canted Roller Drive System
eliminates the need to manually feed valve into or away from grinding wheel during refacing. Canted rollers feed valve against a precision stop which accurately controls valve length on every valve - automatically.
Open Sided Pneumatic Steady Rest
No need to switch off the motors when
changing valves reducing machining time
and increasing life of motors.
Open Sided Pneumatic Steady Rest
No need to switch off the motors when
changing valves reducing machining time
and increasing life of motors.
Large Capacity Coolant
tank and filter system built into
standard storage cabinet.
Large Capacity Coolant
tank and filter system built into
standard storage cabinet.
Stroking Handle
Stroking handle moves the valve back and forth
over the grinding wheel.
Specifications
Valve Size Capacities
Stem Diameter Standard .200" - .600" (5 - 15mm)
Stem Diameter Optional .120" - .200" (3 - 5mm)
Valve Stem Length Minimum: Standard 2.9" (70mm)
Valve Stem Length Minimum: Optional 2" (50mm)
Valve Stem Length Maximum 15" (380mm)
Valve Face Angles
Main Wheel Standard: 10 - 50 Degrees
Main Wheel Optional Up to 19 Degrees Reverse Angle
