VR Series: centerless valve refacing machines
On the VR12, the valve is not clamped in a collet or a chuck: it is guided by the stem, between rollers, and ground without a center. Stem runout stays below 0.005 mm, whatever the valve: the face is concentric to the stem, for maximum sealing and performance.
From the small multi-valve engine valve to the large diesel or gas valve, the machine adapts by adjustment: valve rotation, wheel speed, feed. Grinding of the face, but also of the stem and stem tip, with chamfering.
Rottler · Valve refacing machinesVR SeriesCenterless grinding
No more collets or chucks to change: the valve is guided by the stem and rotates between rollers. Stem runout below 0.005 mm.
Settings for every valve
Valve rotation from 0 to 230 rpm, adjustable wheel speed, face angle from 10° to 60°: one machine for every valve size.
Automatic feed
Angled roller system that controls the valve length precisely, for identical valves across a whole set.
Stem and stem tip
Ø 225 mm main wheel and Ø 100 mm tip wheel: face, stem, stem tip and chamfer on the same machine.
The VR Series models.
The centerless grinding model, for racing as well as rebuilding. Stems from 3.5 to 16 mm, valve length up to 400 mm.
The TURCITE slideway version, for shorter valves: stems from 4 to 14 mm, overall length up to 318 mm.
Specifications.
| VR10 | VR12 | |
|---|---|---|
| Stem diameter | 4.0 – 14.3 mm | 3.5 – 16 mm |
| Stem length | 54 – 260 mm | 50 – 260 mm |
| Overall valve length | 89 – 318 mm | 70 – 400 mm |
| Face angle | — | 10° – 60° |
| Main wheel | — | Ø 225 mm |
| Tip wheel | — | Ø 100 mm |
| Maximum wheel speed | — | 2500 rpm |
| Motor | — | 0.56 kW |
| Coolant | — | 20 L |
| Machine weight | — | ≈ 329 kg |
| Power supply | — | 208-240 V, 10 A, single phase |
Applications.
- Racing: valves with a perfectly concentric face
- Rebuilding of automotive and industrial engines
- Valves of small multi-valve engines
- Valves of large diesel and gas engines
- Stem and stem tip rework
Before you choose.
What does centerless grinding bring?
The valve is guided by the stem, between rollers, with no collet or chuck: stem runout stays below 0.005 mm and the face is concentric to the stem.
Which valve sizes?
VR12: stems from 3.5 to 16 mm, length up to 400 mm, face angle from 10° to 60°. VR10: stems from 4 to 14 mm, length up to 318 mm.
Can the stem and stem tip be reworked?
Yes: Ø 225 mm main wheel and Ø 100 mm tip wheel for the face, the stem, the stem tip and the chamfer, on the same machine.
The detailed brochure.
Specifications, tooling, fixtures and options of the VR Series. Leave your details below and you will receive the documentation.
VR Series: centerless valve refacing machines
On the VR12, the valve is not clamped in a collet or a chuck: it is guided by the stem, between rollers, and ground without a center. Stem runout stays below 0.005 mm, whatever the valve: the face is concentric to the stem, for maximum sealing and performance.
From the small multi-valve engine valve to the large diesel or gas valve, the machine adapts by adjustment: valve rotation, wheel speed, feed. Grinding of the face, but also of the stem and stem tip, with chamfering.
Rottler · Valve refacing machinesVR SeriesCenterless grinding
No more collets or chucks to change: the valve is guided by the stem and rotates between rollers. Stem runout below 0.005 mm.
Settings for every valve
Valve rotation from 0 to 230 rpm, adjustable wheel speed, face angle from 10° to 60°: one machine for every valve size.
Automatic feed
Angled roller system that controls the valve length precisely, for identical valves across a whole set.
Stem and stem tip
Ø 225 mm main wheel and Ø 100 mm tip wheel: face, stem, stem tip and chamfer on the same machine.
The VR Series models.
The centerless grinding model, for racing as well as rebuilding. Stems from 3.5 to 16 mm, valve length up to 400 mm.
The TURCITE slideway version, for shorter valves: stems from 4 to 14 mm, overall length up to 318 mm.
Specifications.
| VR10 | VR12 | |
|---|---|---|
| Stem diameter | 4.0 – 14.3 mm | 3.5 – 16 mm |
| Stem length | 54 – 260 mm | 50 – 260 mm |
| Overall valve length | 89 – 318 mm | 70 – 400 mm |
| Face angle | — | 10° – 60° |
| Main wheel | — | Ø 225 mm |
| Tip wheel | — | Ø 100 mm |
| Maximum wheel speed | — | 2500 rpm |
| Motor | — | 0.56 kW |
| Coolant | — | 20 L |
| Machine weight | — | ≈ 329 kg |
| Power supply | — | 208-240 V, 10 A, single phase |
Applications.
- Racing: valves with a perfectly concentric face
- Rebuilding of automotive and industrial engines
- Valves of small multi-valve engines
- Valves of large diesel and gas engines
- Stem and stem tip rework
Before you choose.
What does centerless grinding bring?
The valve is guided by the stem, between rollers, with no collet or chuck: stem runout stays below 0.005 mm and the face is concentric to the stem.
Which valve sizes?
VR12: stems from 3.5 to 16 mm, length up to 400 mm, face angle from 10° to 60°. VR10: stems from 4 to 14 mm, length up to 318 mm.
Can the stem and stem tip be reworked?
Yes: Ø 225 mm main wheel and Ø 100 mm tip wheel for the face, the stem, the stem tip and the chamfer, on the same machine.
The detailed brochure.
Specifications, tooling, fixtures and options of the VR Series. Leave your details below and you will receive the documentation.