Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X50S-08B
The AirTAC Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X50S-08B is a genuine double-acting profile-type cylinder with a Ø40mm bore, 50mm 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
- Stroke50 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilDC24V
- EntryTerminal
About the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X50S-08B
The SAUF40X50S-08B is a double-acting profile cylinder with a built-in AirTAC 4M210 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 is shorter than an ISO 15552 cylinder of the same bore. The bore dictates a 1/4" cylinder port with an M12x1.25 rod thread.
This 40mm bore unit pushes 628N and pulls 528N at 0.5MPa. The integrated valve operates strictly within a 0.15-0.8MPa window, even though the cylinder body rates to 1.0MPa. The DC24V terminal entry coil offers IP65 protection. The 4M210-08 valve flows 16mm2 (Cv 0.89) at up to 5 cycles/sec. Based on the 0.5MPa push force, the safe working load is roughly 377N, and it can vertically lift about 32kg with a 2:1 margin. The S suffix means a piston magnet is present for CMSG/DMSG/EMSG switches.
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X50S-08B Technical Specifications
| Model | Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X50S-08B |
|---|---|
| Series | SAUF profile cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 50 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 SAUF40X50S-08B
| SAUF | Profile cylinder with built-in 4M valve. |
|---|---|
| 40×50 | 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 SAUF40X50S-08B Is Used
Decentralized Clamping
Ideal for a machining cell where each clamping station uses one coil signal to actuate independently, avoiding a central manifold.
Inline Diverting
Mounts directly on a conveyor diverter arm. The built-in valve minimizes tubing across the moving frame.
Compact Part Ejection
Fits within tight machine cells for ejecting parts, using the integrated valve to save space and simplify wiring.
Is the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X50S-08B the Right Choice?
Size by comparing neighboring bores: a 32mm bore pushes 402N while a 50mm bore pushes 982N at 0.5MPa. This 40mm model delivers a 628N push, making the safe working load approximately 377N. Confirm the DC24V terminal entry coil matches your supply. The default action retracts the rod when energized, but you can reconfigure it to extend by repositioning the valve. Always size force within the 0.15-0.8MPa valve range. The valve only routes air; it is not a lock, so add an external rod lock or pilot-operated check valve to hold a load. For this 50mm stroke, side-load guides are less critical but still recommended for rigid mounting.
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 SAUF40X50S-08B FAQ
It delivers 628N push and 528N pull at 0.5MPa. The built-in valve is a 4M210-08 (1/4" port, Cv 0.89) running on DC24V. The cylinder body rates to 1.0MPa, but you must size force within the valve's 0.15-0.8MPa operating window.
Yes, the default action retracts the rod when energized, but you can reposition the valve to make it extend instead. The valve only routes air; it is not a load lock. For load holding on air loss, install an external rod lock or pilot-operated check valve.
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