Airtac SAUD Double Rod Cylinder SAUD40X250S
The AirTAC Airtac SAUD Double Rod Cylinder SAUD40X250S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 250mm stroke, 1/4" air ports and adjustable end cushioning. Its hard-anodized aluminum-profile barrel is shorter than an ISO 15552 cylinder of the same bore, and it shares SC-series mounting accessories.
- BoreØ40 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAUD Double Rod Cylinder SAUD40X250S
The AirTAC SAUD40X250S is a double-acting, double-rod profile cylinder. A 16 mm rod exits both ends of the hard-anodized aluminum extruded barrel, meaning both faces use the rod-side area. This yields equal output force in both directions, delivering 528 N each way at 0.5 MPa. The body is notably shorter than an ISO 15552 cylinder of the same bore.
This unit includes a built-in piston magnet (-S) for CMSG, DMSG, or EMSG switches. The second protruding rod can drive twin tooling or carry a sensor cam. For sizing, a safe working load is roughly 317 N (about 60% of the 528 N figure), translating to a vertical lift capacity of about 27 kg with a 2:1 safety margin. It operates at 30-800 mm/s, uses a 1/4" port, and a Viton H seal can raise the temperature limit to 150 C.
Airtac SAUD Double Rod Cylinder SAUD40X250S Technical Specifications
| Model | Airtac SAUD Double Rod Cylinder SAUD40X250S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAU series datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G (BSPP). A high-temperature seal (0-150 °C) is available.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAUD Double Rod Cylinder SAUD40X250S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAU-family variants: SAUD (double rod), SAUJ (adjustable stroke), SAUF (with built-in solenoid valve), and SAU-S with built-in magnet. Seals: TPU (blank) / Viton H / NBR N. Sensor switches: CMSG / DMSG / EMSG.
Where the Airtac SAUD Double Rod Cylinder SAUD40X250S Is Used
Twin Spindle Pick & Place
Drives two synchronized grippers simultaneously from one piston, ensuring perfectly parallel part transfer without torsional twist.
Anti-Rotation Edge Guide
Uses the dual rods to resist rotational deflection during web guiding, maintaining precise alignment without external linear bearings.
Cam-Actuated Sequencing
Mounts a switch cam on the rear rod to trip external limit sensors, providing confirmation of the return stroke in tight spaces.
Is the Airtac SAUD Double Rod Cylinder SAUD40X250S the Right Cylinder?
Select this 40 mm bore if you need 528 N of equal bidirectional force at 0.5 MPa. Stepping up to the 50 mm bore gives 825 N both ways, while dropping to the 32 mm bore provides 345 N. A double rod is the right call when your mechanism requires anti-rotation guidance, synchronized twin tooling, or back-end switch actuation. Mounting is limited to Basic, FA flange, and LB foot styles, matching the AirTAC SC series. At 250 mm stroke, external load guides are recommended to prevent side-load binding. The -S magnet enables position sensing.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB — same as SC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAUD Double Rod Cylinder SAUD40X250S FAQ
Because the 16 mm rod exits both ends, the force is equal in both directions: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. It uses a 1/4" port.
No, the adjustable 21 mm air cushions only decelerate the piston near the end caps. To prevent drift on air loss, install an external rod lock or pilot-operated check valve.
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