Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125-08A
The AirTAC Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125-08A 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 SAUF40X125-08A
The SAUF40X125-08A 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 a standard ISO 15552 unit of the same bore. This model has a 125 mm stroke, a 1/4" cylinder port, and a 1/4" valve port.
Operating within the 0.15-0.8 MPa valve window, it delivers 628 N push force at 0.5 MPa. The AC220V terminal-entry coil offers IP65 protection and a response under 0.05 s. The valve flows 16 mm2 (Cv 0.89) at up to 5 cycles per second. For sizing, the safe working load is roughly 377 N, and it can vertically lift about 32 kg with a 2:1 margin. This SKU lacks a magnet and cannot accept a sensor.
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125-08A Technical Specifications
| Model | Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125-08A |
|---|---|
| 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 SAUF40X125-08A
| 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 SAUF40X125-08A Is Used
Decentralized Clamping
Ideal for a multi-station machining line where each clamp needs its own direct AC220V signal without running tubing back to a central manifold.
Independent Diverters
Perfect for conveyor sorting gates that switch independently at up to 5 cycles per second, saving manifold slots and simplifying layout.
Compact Ejectors
Fits into tight packaging machine cells, using the short profile barrel and integrated 4M210-08 valve to eject parts locally.
Is the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X125-08A the Right Choice?
When sizing, compare neighbouring bores: the 32 mm bore pushes 402 N, while the 50 mm bore pushes 982 N at 0.5 MPa. This 40 mm bore provides 628 N push and 528 N pull at 0.5 MPa. Always size force within the 0.15-0.8 MPa valve range, not the 1.0 MPa cylinder body rating. Confirm the AC220V terminal entry suits your supply. By default the rod retracts when energised; reposition the valve to switch to extend-when-energised. The built-in valve routes air and is not a load lock—add an external rod lock or pilot-operated check valve to hold loads. For this 125 mm stroke side-load is minimal, but for strokes over 300 mm add a guide. Without a -S suffix, this unit cannot take a magnetic switch.
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 SAUF40X125-08A FAQ
It pushes 628 N and pulls 528 N at 0.5 MPa. The built-in valve is a 4M210-08 (1/4" port, Cv 0.89, 5 cycles/s max) driven by an AC220V terminal-entry coil. Although the cylinder body rates to 1.0 MPa, the assembled unit must operate within the 0.15-0.8 MPa valve window.
Yes. The default action retracts the rod when energised, but you can reposition the valve on the cap to make it extend-when-energised. Because the valve only routes air, it is not a load lock; use an external rod lock or pilot-operated check valve if you need to hold a load.
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