Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125S-08A
The AirTAC Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125S-08A is a genuine double-acting profile-type cylinder with a Ø40mm bore, 125mm 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
- Stroke125 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilAC220V
- EntryTerminal
About the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125S-08A
The SAUF40X125S-08A 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 valve's 0.15-0.8 MPa window, this 40mm bore delivers 628N push and 528N pull at 0.5 MPa. The 1/4" valve port flows 16 mm2 (Cv 0.89) at up to 5 cycles/sec. The cylinder body rates to 1.0 MPa but the assembled unit is capped by the valve. Computed buyer insight: safe working load is about 377N (60% of the 0.5MPa push), and vertical lift is roughly 32kg with a 2:1 margin.
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125S-08A Technical Specifications
| Model | Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125S-08A |
|---|---|
| Series | SAUF profile cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 125 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 | AC220V · AC 3.5 VA |
| 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 SAUF40X125S-08A
| SAUF | Profile cylinder with built-in 4M valve. |
|---|---|
| 40×125 | Bore × stroke in mm. |
| -08 | Valve port 1/4" → 4M210-08. |
| A | Coil voltage AC220V. |
| 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 SAUF40X125S-08A Is Used
Decentralized Clamping
Ideal for a machining cell where each clamping station uses one coil signal to actuate independently, saving manifold space and routing complex tubing back to a central panel.
Inline Diverting
Perfect for a conveyor diverter gate that requires a self-contained actuator; the integrated 4M210 valve handles the 5 cycles/sec demand right at the point of operation.
Package Pushing
Excellent for a decentralized packaging push-off that lifts up to 32kg vertically, using the built-in magnet for position confirmation without a remote valve bank.
Is the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125S-08A the Right Choice?
Size against the 50mm bore (982N push @0.5MPa) or the 32mm bore (402N push @0.5MPa) depending on your force needs. This 40mm bore has a 1/4" cylinder port, a 16mm rod, and an M12x1.25 rod thread. Confirm the AC220V terminal entry suits your control system. Default action retracts the rod when energised, but you can reposition the valve to extend on signal. Always size force within the 0.15-0.8 MPa valve range, never the 1.0 MPa cylinder body rating. The built-in valve routes air and is not a lock; add an external rod lock or pilot-operated check valve to hold a load. For this 125mm stroke, side-load is minimal, but ensure adequate guiding for longer strokes.
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 SAUF40X125S-08A FAQ
It pushes 628N and pulls 528N at 0.5MPa. The built-in valve is a 4M210-08 (1/4" port, Cv 0.89, 5 cycles/sec) driven by an AC220V terminal coil. Although the cylinder body rates to 1.0MPa, the assembled unit must operate within the valve's 0.15-0.8MPa window.
The default action retracts the rod when energised. You can reconfigure it to extend on signal by repositioning the built-in valve. This self-switching design means no remote valve is needed, and the valve only routes air—it will not hold the load without air pressure.
Related AirTAC Cylinders & Valves
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