Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B
The AirTAC Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B is a genuine double-acting profile-type cylinder with a Ø40mm bore, 250mm stroke and a built-in 4M210-08 5/2 solenoid valve — it switches itself from one coil signal, so no separate remote valve or extra plumbing is needed.
- BoreØ40 mm
- Stroke250 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilDC24V
- EntryTerminal
About the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B
The SAUF40X250S-08B is a double-acting profile cylinder with a built-in AirTAC 4M210-08 5/2 solenoid valve on the cap. One coil signal drives the actuator, eliminating remote plumbing and saving a manifold slot. The extruded aluminum barrel makes it shorter than an ISO 15552 cylinder of the same bore. The S suffix means a piston magnet is present for CMSG/DMSG/EMSG switches.
Operating within the 0.15-0.8 MPa valve window, this 40mm bore delivers 628N push and 528N pull at 0.5 MPa. The 1/4" valve port yields a 16mm2 flow (Cv 0.89) with a 5 cycle/s limit. The cylinder port is 1/4". For sizing, the safe working load is roughly 377N, and vertical lift is about 32kg with a 2:1 margin. The DC24V terminal coil offers IP65 protection.
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B Technical Specifications
| Model | Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B |
|---|---|
| Series | SAUF profile cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting, self-valved |
| Cylinder port | 1/4" |
| Rod thread | M12×1.25 |
| PU tube | Ø8 × Ø5 |
| Built-in valve | 4M210-08 (5/2) |
|---|---|
| Valve flow | 16.0 mm² (Cv 0.89) |
| Max frequency | 5 cycle/sec |
| Coil voltage | DC24V · DC 3.0 W |
| Electrical entry | Terminal · IP65 · B class |
| Response time | 0.05 s and below |
| Operating pressure | 0.15 – 0.8 MPa (valve limit) |
| Speed range | 30 – 800 mm/s |
The cylinder rates to 1.0 MPa but the built-in valve operates 0.15–0.8 MPa, so run the assembled SAUF at 0.15–0.8 MPa. Default: rod retracts when the coil is energised (reconfigurable to extend). Specs follow the official AirTAC SAUF datasheet. Port options: PT / G.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
Sized within the valve's 0.15–0.8 MPa range. Actual usable force is lower than theoretical due to friction and back-pressure.
Model Code: Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B
| SAUF | Profile cylinder with built-in 4M valve. |
|---|---|
| 40×250 | Bore × stroke in mm. |
| -08 | Valve port 1/4" → 4M210-08. |
| B | Coil voltage DC24V. |
| I / (blank) | Terminal electrical entry. |
SAUF does not hold its load without air — the valve routes air, it is not a lock. For a held load, add an external rod lock or a pilot-operated check valve.
Where the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B Is Used
Decentralized Clamping
Ideal for a multi-station machining line where each clamping point needs independent control without routing long tubing back to a central manifold.
Package Diverting
Perfect for a conveyor diverter arm requiring rapid action; the built-in 4M210 valve handles 5 cycles/s for high throughput.
Compact Assembly Station
Fits tight machine frames thanks to the extruded profile, providing one-signal part ejection without occupying valuable manifold space.
Is the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B the Right Choice?
When sizing, compare neighbours: bore 32 gives 402N push at 0.5 MPa, while bore 50 gives 982N. This 40mm bore yields 628N push and 528N pull at 0.5 MPa. Confirm the DC24V terminal coil and PT threads fit your control scheme. The default action retracts the rod when energised; reposition the valve to extend-when-energised. Size force within the 0.15-0.8 MPa valve range, not the 1.0 MPa cylinder body rating. The valve routes air and is not a lock—add an external rod lock or pilot-operated check valve to hold loads. For this 250mm stroke, guide the rod to manage side loads.
Quick checklist
- ✓ Force at 0.15–0.8 MPa
- ✓ Coil voltage matches panel
- ✓ Terminal vs grommet entry
- ✓ Retract- or extend-when-energised
- ✓ Load-holding → external rod lock
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08B FAQ
It delivers 628N push and 528N pull at 0.5 MPa. The built-in valve is a 4M210-08 (1/4" port, Cv 0.89, 5 cycle/s max) driven by a DC24V terminal coil. The cylinder body rates to 1.0 MPa, but you must size force within the assembled valve's 0.15-0.8 MPa operating window.
Yes. The default action retracts the rod when energised, but you can reconfigure it to extend-when-energised by repositioning the built-in valve. This self-switching design means one coil signal drives the cylinder directly at the actuator, saving a remote valve and manifold slot.
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