SG Series: valve seats and guides
The SG Series machines cylinder head valve seats and guides with one simple idea: the seat must be concentric to the guide. A UNIPILOT carbide pilot centers in the guide, the air-float spherical-alignment spindle follows the true axis of the guide, and the seat is cut around it.
From the precision manual model to the programmable guide-to-guide center, the method stays the same: only the level of automation and the size of head accepted change, from automotive and racing heads to large diesels.
Rottler · Valve seat and guide machinesSG SeriesUNIPILOT centering
Solid carbide pilots centered directly in the guide: maximum rigidity, seat concentric to the guide, whatever the head.
Spherical-alignment spindle
Automatic pneumatic alignment: the spindle compensates for guide misalignment. The work table floats on an air cushion for positioning.
Multi-angle cutting
Multi-angle carbide inserts: the seat angles are cut in a single operation, with an on-board insert sharpener on the automatic versions.
From manual to automatic
Touch-screen control across the range. The SG10XY and SG100XY run on their own, guide to guide, with servo motors and a variable-speed spindle.
The SG Series models.
The precision manual model, in MANUALMATIC mode (automatic functions) or manual. Ø 80 mm spindle, air-float table, ±15° tilt, built-in vacuum leak tester, optional 360° head roll-over.
The programmable automatic guide-to-guide center: servo-driven positioning from one guide to the next, X-axis fast alignment system, electronic level and angle sensor.
Large capacity for heavy-duty engine heads, from small to very large. R40 taper spindle, carbide pilots, conversational touch-screen control, 360° roll-over as standard, plunge cutting of large seats.
Automatic large capacity: programmable guide-to-guide, SSV spindle speed variation, Windows touch-screen control. Fixtures for four single-cylinder heads or for large 24-valve castings.
Specifications.
| SG9MTS | SG10XY | |
|---|---|---|
| Control | MANUALMATIC touch screen | CNC touch screen, automatic |
| Seat diameters | 14 – 80 mm | 14 – 80 mm |
| Spindle | Ø 80 mm, pneumatic spherical alignment | Ø 80 mm, pneumatic spherical alignment |
| Spindle vertical travel | 200 mm | 180 mm |
| Spindle speed | 40 – 870 rpm | 50 – 1000 rpm |
| Spindle taper | R30, quick change | — |
| Station horizontal travel | 1105 mm | 1105 mm |
| Tilt | ± 15° | ± 15° |
| Machine weight | ≈ 1304 kg | ≈ 1630 kg |
| Power supply | 208-240 V, 15 A, single phase | 208-240 V, 30 A, single phase |
| Compressed air | 100 l/min at 6 bar | 100 l/min at 6 bar |
Applications.
- Automotive and racing engine heads
- Diesel engine heads (SG100A, SG100XY)
- Rebuilding: seats and guides in the same range
- Large heads and 24-valve castings (SG100XY)
- Plunge cutting of large seats (SG100A)
Before you choose.
Why must the seat be concentric to the guide?
Because the sealing and the service life of the head depend on it. The UNIPILOT carbide pilot centers in the guide and the spherical-alignment spindle follows the true axis of the guide: the seat is cut around it.
SG9MTS or SG10XY?
SG9MTS: the precision manual model, with MANUALMATIC automatic functions. SG10XY: the programmable guide-to-guide center, with servo-driven positioning. For large diesel heads: SG100A and SG100XY.
Are the seat angles cut in one pass?
Yes, with multi-angle carbide inserts, and an on-board insert sharpener on the automatic versions.
The detailed brochure.
Specifications, tooling, fixtures and options of the SG Series. Leave your details below and you will receive the documentation.

SG Series: valve seats and guides
The SG Series machines cylinder head valve seats and guides with one simple idea: the seat must be concentric to the guide. A UNIPILOT carbide pilot centers in the guide, the air-float spherical-alignment spindle follows the true axis of the guide, and the seat is cut around it.
From the precision manual model to the programmable guide-to-guide center, the method stays the same: only the level of automation and the size of head accepted change, from automotive and racing heads to large diesels.
Rottler · Valve seat and guide machinesSG SeriesUNIPILOT centering
Solid carbide pilots centered directly in the guide: maximum rigidity, seat concentric to the guide, whatever the head.
Spherical-alignment spindle
Automatic pneumatic alignment: the spindle compensates for guide misalignment. The work table floats on an air cushion for positioning.
Multi-angle cutting
Multi-angle carbide inserts: the seat angles are cut in a single operation, with an on-board insert sharpener on the automatic versions.
From manual to automatic
Touch-screen control across the range. The SG10XY and SG100XY run on their own, guide to guide, with servo motors and a variable-speed spindle.
The SG Series models.
The precision manual model, in MANUALMATIC mode (automatic functions) or manual. Ø 80 mm spindle, air-float table, ±15° tilt, built-in vacuum leak tester, optional 360° head roll-over.
The programmable automatic guide-to-guide center: servo-driven positioning from one guide to the next, X-axis fast alignment system, electronic level and angle sensor.
Large capacity for heavy-duty engine heads, from small to very large. R40 taper spindle, carbide pilots, conversational touch-screen control, 360° roll-over as standard, plunge cutting of large seats.
Automatic large capacity: programmable guide-to-guide, SSV spindle speed variation, Windows touch-screen control. Fixtures for four single-cylinder heads or for large 24-valve castings.
Specifications.
| SG9MTS | SG10XY | |
|---|---|---|
| Control | MANUALMATIC touch screen | CNC touch screen, automatic |
| Seat diameters | 14 – 80 mm | 14 – 80 mm |
| Spindle | Ø 80 mm, pneumatic spherical alignment | Ø 80 mm, pneumatic spherical alignment |
| Spindle vertical travel | 200 mm | 180 mm |
| Spindle speed | 40 – 870 rpm | 50 – 1000 rpm |
| Spindle taper | R30, quick change | — |
| Station horizontal travel | 1105 mm | 1105 mm |
| Tilt | ± 15° | ± 15° |
| Machine weight | ≈ 1304 kg | ≈ 1630 kg |
| Power supply | 208-240 V, 15 A, single phase | 208-240 V, 30 A, single phase |
| Compressed air | 100 l/min at 6 bar | 100 l/min at 6 bar |
Applications.
- Automotive and racing engine heads
- Diesel engine heads (SG100A, SG100XY)
- Rebuilding: seats and guides in the same range
- Large heads and 24-valve castings (SG100XY)
- Plunge cutting of large seats (SG100A)
Before you choose.
Why must the seat be concentric to the guide?
Because the sealing and the service life of the head depend on it. The UNIPILOT carbide pilot centers in the guide and the spherical-alignment spindle follows the true axis of the guide: the seat is cut around it.
SG9MTS or SG10XY?
SG9MTS: the precision manual model, with MANUALMATIC automatic functions. SG10XY: the programmable guide-to-guide center, with servo-driven positioning. For large diesel heads: SG100A and SG100XY.
Are the seat angles cut in one pass?
Yes, with multi-angle carbide inserts, and an on-board insert sharpener on the automatic versions.
The detailed brochure.
Specifications, tooling, fixtures and options of the SG Series. Leave your details below and you will receive the documentation.

Your need doesn't fit the page? Describe it.
Your engines, your operations, your volume: the RECTIPERF assistant points you to the right Rottler series, using the content of this site.
+33 (0)4 58 10 59 66
Price request, series documentation, training, after-sales service: Jonathan answers you. Or write to j.philips@rectiperf.com.
Your need doesn't fit the page? Describe it.
Your engines, your operations, your volume: the RECTIPERF assistant points you to the right Rottler series, using the content of this site.
+33 (0)4 58 10 59 66
Price request, series documentation, training, after-sales service: Jonathan answers you. Or write to j.philips@rectiperf.com.