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VR7 Valve Refacing MachineNew Standards The VR7 sets new standards in speed and accuracy for Performance Racing and Remanufacturing cylinder head work. The air operated 2 x 3 Ball Precision Chuck System eliminates collets. Valve face is machined concentric to the valve stem for improved sealing, better heat transfer and reduces mechanical stresses on valves.

Grinding WheelsThe VR7 is supplied standard with vitrified wheels, grinding oil and two diamond dressers. Special wheels available for grinding difficult metals such as Titanium, Inconell, etc.

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.

Control PanelVariable Chuck Speed and Selector for Grinding or Wheel Dressing

Solid Cast Iron Construction Dampens harmonics, eliminates chatter, and maintains accuracy for a long service life.

Large Capacity CoolantTank and filter system built into optional storage cabinet.

Fine Feed Handle and Depth Stop Allows valves to be ground to the exact same length – a requirement for today’s computer controlled engines.

Diamond Wheel DressersMain and Butt Wheel Diamond Dressers are mounted on the machine ready for quick dressing with minimum material removal. Just swing the dresser into place and the point of the diamond is exactly where it was set for the last dressing

Base CabinetOptional Base Storage Cabinet includes a large 5 gal (20 liter) removable coolant tank with replaceable paper filter system. Coolant tank has drain plug and is easily removed for quick cleaning. This large capacity filtered coolant system allows machine use for months and months with no cleaning or maintenance required saving time and money.

Stroking HandleStroking handle moves the valve back and forth over the grinding wheel

Stem/Butt End ChamferingSpecial stop arm allows the valve to be pressed against the stop while rotating resulting in equal chamfer on valve end. Stop arm pivots out of the way when not in use.

Rocker Arm AttachmentAllows refacing of most shaft type rocker arms.

Stem/Butt End GrindingGrind Valve Stem End square to the valve centerline. The V rest allows all valves in a set to be ground to the same distance from valve seat to stem end - essential for overhead camshaft type cylinder heads. Exact amount of material removed from the stem end can be measured with the micrometer adjustment system.

Valve Size CapacitiesStem Diameter Standard . 150” - .560” (4mm – 14mm)Valve Stem Length Minimum 2.875” ( 73mm)Valve Stem Length Maximum 12” ( 305mm)

Valve Head Diameter .750” – 4” (19mm – 100mm)

Valve Face Angle 15-55 Degrees

Grinding WheelsMain Valve Seat Wheel 7” (180mm)Stem/Butt End Wheel 3” (76mm)

Valve Rotation Speed Variable up to 300rpm

Coolant CapacityStandard (without cabinet) 1 Gal / 4 LitresOptional (with cabinet) 5 Gal / 20 Litres

ElectricalRequirementStandard 230VAC, 50Hz, 1Ph, 10AOptional 115VAC, 60Hz, 1Ph, 20A

Motor Power RatingMain & Butt Wheel Motor .5 HP / .37kWChuck Drive Motor HP .083 /.062 kW

Air Requirement 100psi / 6 Bar

Floor Space Requirement 42.5” x 26” x 22” (without cabinet) (1080mm x 660mm x 560mm)

Floor Space Requirement 42.5” x 26” x 52”H (with cabinet) (1080mm x 660mm x 1320mmH)

Shipping Dimensions 35.5” x 27”” x 24.5”H(without cabinet) (902mm x 686mm x 625mmH)

Shipping Dimensions 35.5” x 27” x 57.5”H(with cabinet) (902mm x 686mm x 1460mmH)

Shipping Weight 660lbs (300kg)

Specifications and design subject to change without notice.

Specifications

VR7 ValveRefacing Machine

August 2010

Precision Chuck SystemPneumatic Operated Quick Action 2 X 3 Ball Precision Chuck driven by large, heavy duty variable speed gear motor. The 2 X 3 ball chuck allows a wide range of valve stem diameters to be ground without changing any parts – no collets or wrenches! The 2 X 3 ball chuck gives extremely accurate run-out for improved sealing, better heat transfer and reduces mechanical stresses on valves.

8029 South 200th StreetKent, Washington 98032 USA

+1 253 872 7050

1-800-452-0534

Represented by:www.rottlermfg.comwww.youtube.com/rottlermfgwww.facebook.com/rottlermfg