Airtac SAU Standard Air Cylinder SAU40X900S
The AirTAC Airtac SAU Standard Air Cylinder SAU40X900S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 900mm 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
- Stroke900 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 SAU Standard Air Cylinder SAU40X900S
The AirTAC SAU40X900S is a double-acting profile-type cylinder featuring a 40mm bore and a 900mm stroke. Its extruded aluminum barrel makes it shorter and more compact than an ISO 15552 cylinder of the same bore, providing a space-saving footprint for tight machinery. It delivers a push force of 628 N and a pull force of 528 N at 0.5 MPa. The 1/4" port and M12x1.25 rod thread are standard for this bore size.
For practical sizing, plan for a safe working load of about 377 N at 0.5 MPa, accounting for seal friction and smooth travel. This equates to lifting roughly 32 kg vertically with a 2:1 safety margin. The -S suffix indicates an integrated piston magnet, allowing you to mount CMSG, DMSG, or EMSG sensors directly into the barrel groove for position detection. You can also select TPU, NBR, or Viton H seals, with the Viton H option extending operating temperatures up to 150 C.
Airtac SAU Standard Air Cylinder SAU40X900S Technical Specifications
| Model | Airtac SAU Standard Air Cylinder SAU40X900S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 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 SAU Standard Air Cylinder SAU40X900S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×900 | 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 SAU Standard Air Cylinder SAU40X900S Is Used
Pallet Diversion
Routes packages on a 900mm transfer line using the 628 N push force to deflect cardboard cartons at high speed.
Vertical Tray Lifting
Raises lightweight storage trays weighing up to 32 kg in automated retrieval systems, relying on the magnet for position feedback.
Film Roll Feeding
Unwinds packaging material over a long 900mm stroke, utilizing the adjustable end cushions to prevent harsh impacts at high travel speeds.
Is the Airtac SAU Standard Air Cylinder SAU40X900S the Right Cylinder?
When sizing this actuator, compare it against adjacent bores to match your load. The next size down, a 32mm bore, provides 402 N of push force at 0.5 MPa, while the next size up, a 50mm bore, yields 982 N. This 40mm model strikes a balance for medium-duty tasks. Because this SKU features a 900mm stroke, you must use external guide rails to prevent rod bending and premature seal wear caused by side loads. Mounting is simplified using AirTAC SC-series accessories, such as LB foot brackets or FA flanges. Note that the adjustable air cushion at both ends only decelerates the piston near stroke end; it does not act as a brake. If your application must hold a load vertically during air loss, install an external rod lock or a pilot-operated check valve.
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 SAU Standard Air Cylinder SAU40X900S FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At 0.7 MPa, the push force is 879 N, and at 0.9 MPa it is 1130 N. The theoretical maximum force is 128 kgf at 1.0 MPa. The operating pressure range is 0.15-1.0 MPa, and the standard speed range is 30-800 mm/s.
No, this is a compact profile cylinder and is not dimensionally interchangeable with ISO 15552 standards. You must use AirTAC SC-series mounting accessories like FA flanges or LB foot brackets. Because this is an -S model with a built-in magnet, you can install CMSG, DMSG, or EMSG switches directly into the sensor groove on the barrel.
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