Airtac SAUD Double Rod Cylinder SAUD40X400S
The AirTAC Airtac SAUD Double Rod Cylinder SAUD40X400S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 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 SAUD40X400S
The AirTAC SAUD40X400S is a double-acting, double-rod profile cylinder. A 16 mm rod exits both ends of the hard-anodized aluminum extruded barrel, meaning push and pull forces are identical at 528 N each way at 0.5 MPa. This compact profile body is notably shorter than an ISO 15552 unit of the same 40 mm bore. The 1/4" port and M12x1.25 rod thread are fixed by the bore.
Because the piston carries a magnet, this -S SKU supports CMSG, DMSG, and EMSG switches for position sensing. The twin rods prevent twist and allow driving two tools at once. For sizing, a safe working load is roughly 317 N, and it can vertically lift about 27 kg with a 2:1 margin. A Viton H seal option raises the operating ceiling to 150 C.
Airtac SAUD Double Rod Cylinder SAUD40X400S Technical Specifications
| Model | Airtac SAUD Double Rod Cylinder SAUD40X400S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAUD40X400S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SAUD40X400S Is Used
Twin-Tool Synchronization
Drives two opposing grippers or forming tools simultaneously from one piston, ensuring perfectly matched timing without external linkages.
Anti-Rotation Forming
The dual rods provide inherent resistance to mechanical twist during pressing or stamping tasks, keeping the workpiece aligned without external guides.
Back-Rod Switch Cam
Uses the protruding rear rod to trip a CMSG or DMSG reed switch, freeing the front end entirely for unobstructed tool engagement.
Is the Airtac SAUD Double Rod Cylinder SAUD40X400S the Right Cylinder?
Choose this 40 mm bore when you need 528 N of equal force in both directions. If you need less power, step down to the 32 mm bore (345 N); if your application requires more, step up to the 50 mm bore (825 N). The double-rod layout is ideal for anti-rotation tasks, mounting a sensor cam on the back rod, or synchronizing twin tooling. Mounting is limited to Basic, FA flange, and LB foot styles, matching the AirTAC SC series. Because the 400 mm stroke is long, add external guide rails to prevent rod bending under side loads.
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 SAUD40X400S FAQ
The force is equal in both directions because it is a double-rod cylinder. It outputs 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. The 1/4" port feeds both chambers equally.
No, a plain double-rod cylinder drifts without live air; the adjustable 21 mm cushions only decelerate the piston near the end caps. For secure load holding, install an external rod lock or a pilot-operated check valve.
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