Valve Refacing Machine

Pneumatic Operated Quick Action 2 X 3 Ball Precision Chuck System
Hardened Steel Precision Linear Roller Bearings for Grinding Wheel Slideways
Variable Valve Rotation Speed up to 250RPM
End Stop System to grind valves in a set to equal length from butt end to seat face
Butt Grinding and Chamfering Device including micrometer and adjustable V Nest
Main Wheel and Stem End/Butt Wheel Dressing Devices mounted on the machine
Shaft Type Rocker Arm Grinding Attachment
Main Grinding Wheel 7.0" (180mm) Diameter, General Purpose (VTRW-8)
Butt Grinding Wheel 3.0" (75mm) Diameter, General Purpose (VTRW-9)
Diamond dresser for dressing main and butt grinding wheel (VTRW-4)
Grinding Oil Pump and Grinding Oil [7609A 1 Gallon (5 Liters) supplied when base cabinet not ordered]
Adjustable Work light
Tools and Wrenches including chuck assembly tool
Operation and Spare Parts Manual

New 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.
Linear Roller Bearing Slideway - Hardened steel precision ground linear roller bearing slideways allow easy stroking of the wheel slide reducing operator fatigue and improving surface finish on the valve seat face for improved sealing and cooling. No friction and wear associated with dovetail slideways. Featherlite stroking with linear slideways requires only one finger to move the wheel back and forth over the valve.
Grinding Wheels - The 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.
Solid Cast Iron Construction - Dampens harmonics, eliminates chatter, and maintains accuracy for a long service life.
Large Capacity Coolant - Tank 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.
Stem/Butt End Chamfering - Special 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.
Stem/Butt End Grinding - Grind 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.
Rocker Arm Attachment - Allows refacing of most shaft type rocker arms.
Diamond Wheel Dressers - Main 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
Stroking Handle - Stroking handle moves the valve back and forth over the grinding wheel
Base Cabinet - Optional 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.

Precision Chuck System Pneumatic 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.

Linear Roller Bearing Slideway
Hardened steel precision ground linear roller bearing slideways allow easy stroking of the wheel slide reducing operator fatigue and improving surface finish on the valve seat face for improved sealing and cooling. No friction and wear associated with dovetail slideways. Featherlite stroking with linear slideways requires only one finger to move the wheel back and forth over the valve.

For more information: See the VR7 Brochure or give us a call at +1 (253) 872-7050

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 Panel features Variable Chuck Speed and Selector for Grinding or Wheel Dressing.

For more information: See the VR9 Brochure or give us a call at +1 (253) 872-7050

Photos may show optional equipmenent.

VR7 Machine Specifications	American	Metric
Control	Manual
Machine Weight	670lbs	305kg
Base Cabinet	Optional
Valve Stem Diameter Range (with Standard Chuck)	0.157"-0.551"	4mm-14mm
Valve Stem Length Range (with Standard Chuck)	2.125"-10.250"	54mm-260mm
Valve Head Diameter Range	0.781"-4.000"	20mm-102mm
Valve Total Length Range	3.500"-12.500"	89mm-317mm
Valve Face Angle Range	15°-50°
Valve Grinding Wheel Diameter	7.000"	178mm
Butt Grinding Wheel Diameter	3.000"	76mm
Valve & Butt Grinding Wheel Speed	3450 RPM at 60Hz & 2850 at 50Hz
Valve Rotation Speed	20250
Coolant Capacity (with Cabinet)	5 Gallon	20 Liter
Valve Grinding Motor Power	0.5 HP, AC	0.375 Kw, AC
Grinding Oil Pump Power Flow	0.025HP - 300GPH	0.02KW - 20LPM
Valve Rotation Motor Power	0.083 HP, DC	0.062 Kw, DC
Valve Stem Diameter Range (with Optional Small Chucks - VR7 Only	0.138"-.750"	3.5mm-19mm
Valve Stem Length Range (with Optional Large Chucks - VR7 Only)	1.220"-10.250"	31mm-260mm
Coolant Capacity (without Cabinet - VR7 Only)	1 Gallon	5 Liter
Dimensions - Machine (without base cabinet - VR7 Only)	36D x 27W x 25" H	902D x 686W x 622mm H
Dimensions - Shipping (without base cabinet - VR7 Only)	27D x 34W x 25" H	686D x 864W x 635mm H
Machine Weight (without base cabinet - VR7 Only)	420 lbs	191 Kgs
Dimensions - Machine	36D x 27W x 58" H	902D x 686W x 1461mm H
Dimensions - Shipping	37D x 37W x 58" H	640D x 940W x 1473mm H
Electrical Requirements	115 or 230V, 20 or 10A, 50/60Hz, 1Ph
Air Requirements	cfm @ 90 psi	l/min @ 6 bar
Paint Color Code	RAL9002 (Grey White)

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