The VR 5 bench-type valve grinding machine is designed for precise valve face and stem-end grinding in performance engine shops and cylinder-head rebuilding facilities. The machine uses a variable-speed drive and an air-operated, six-ball high-precision chuck that eliminates collets. This chuck system centers the valve stem accurately and maintains true concentricity between the valve face and stem, ensuring proper sealing and reducing heat transfer issues.
The VR 5’s rigid structure and high-speed grinding capability provide stable, repeatable results across a wide range of valve sizes. Its design supports the accuracy and surface finish requirements demanded by modern racing and high-output engine applications.
| Valve Stem Diameter Range (Standard Chuck) | 4 - 14 mm |
| Valve Stem Length Range (Standard Chuck) | 62 - 260 mm |
| Valve Stem Diameter Range (Mini Chuck) | 3.5 - 7.1 mm |
| Valve Stem Length Range (Mini Chuck) | 31 - 200 mm |
| Valve Total Length Range | 90 - 315 mm |
| Valve Face Angle Range | 15° - 60° |
| Valve Grinding Wheel Diameter | ± 10 Degrees |
| Butt Grinding Wheel Diameter | 7" |
| Valve & Butt Grinding Wheel Speed | 3" |
| Valve Rotation Speed | Variable speed 0 min - 300 max |
| Coolant Capacity (with Cabinet) | 4 ltr. |
| Valve Grinding Motor Power | 90 watt, 220v 3 phase 50/60Hz |
| Grinding Oil Pump Power / Flow | 12 LPM |
| Electrical Supply | 115/230v 1 phase 50/60 Hz |
| Net Weight (Approx.) | 150 kg |
| Shipping Weight (Approx.) | 191 kg |
Air-operated quick-action chuck using a six-ball precision centering system
Vacuum-hardened tool-steel chuck for high concentricity and wear resistance
Hardened dovetail slideways for stable and accurate movement
Motor controller converts single-phase input power to three-phase for the main grinding motor
Variable valve rotation speed, adjustable up to 250 rpm
Butt grinding and chamfering unit with micrometer adjustment and adjustable V-nest
Integrated dressing devices for both the main grinding wheel and the butt wheel
Main grinding wheel: 7″ (180 mm) diameter, general-purpose specification
Optional grinding wheels available for stainless steel and titanium (sold separately)
Diamond dresser supplied for the main grinding wheel
Butt grinding wheel: 3″ (75 mm) diameter
Diamond dresser supplied for the butt wheel
Tools and wrenches included, along with specialized chuck-service tools
Quick-change chuck design for fast transitions between chuck sizes
| Compare Model Specs |
Current Model
|
Comparison Model
|
|---|---|---|
| FEATURES |
VR 5
|
|
| Valve Stem Diameter Range (Standard Chuck) | 4 - 14 mm | 4 - 14 mm |
| Valve Stem Length Range (Standard Chuck) | 62 - 260 mm | 62 - 260 mm |
| Valve Stem Diameter Range (Mini Chuck) | 3.5 - 7.1 mm | 3.5 - 7.1 mm |
| Valve Stem Length Range (Mini Chuck) | 31 - 200 mm | 31 - 200 mm |
| Valve Total Length Range | 90 - 315 mm | 90 - 315 mm |
| Valve Face Angle Range | 15° - 60° | 15° - 60° |
| Valve Grinding Wheel Diameter | ± 10 Degrees | 7" |
| Butt Grinding Wheel Diameter | 7" | 3" |
| Valve & Butt Grinding Wheel Speed | 3" | 4200 |
| Valve Rotation Speed | Variable speed 0 min - 300 max | Variable speed 0 min - 300 max |
| Coolant Capacity (with Cabinet) | 4 ltr. | 20 ltr. |
| Valve Grinding Motor Power | 90 watt, 220v 3 phase 50/60Hz | 90 watt, 220v 3 phase 50/60Hz |
| Grinding Oil Pump Power / Flow | 12 LPM | 12 LPM |
| Electrical Supply | 115/230v 1 phase 50/60 Hz | 115/230v 1 phase 50/60 Hz |
| Net Weight (Approx.) | 150 kg | 265 kg |
| Shipping Weight (Approx.) | 191 kg | 300 kg |
| discover |
