Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S
The AirTAC Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 280mm 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
- Stroke280 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 SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S
The AirTAC SAUJ40X280-30S is a double-acting, single-rod profile cylinder with an on-site extend stroke adjustment window of 30 mm. You can trim the usable extend stroke down from the 280 mm maximum to 250 mm via an external stop screw. It features a 1/4" port, an M12x1.25 rod thread, and 21 mm adjustable air cushions at each end. The extruded aluminum profile barrel makes it shorter than an ISO 15552 cylinder of the same bore. The -S suffix indicates a built-in piston magnet for CMSG, DMSG, or EMSG position switches.
Force output for this 40 mm bore is 628 N push and 528 N pull at 0.5 MPa, rising to 1130 N push at 0.9 MPa. For sizing, the safe working load is roughly 377 N, and it can vertically lift about 32 kg with a 2:1 safety margin. The external stop screw sets the end position but does not lock the load; you must retain live air or use an external rod lock to prevent drift. A Viton H seal option extends the operating temperature from the standard -20 to +70 C range up to 150 C.
Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S Technical Specifications
| Model | Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 280 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 SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×280 | 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 SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S Is Used
Compensating Clamp Stroke
Adjusts the extend position by up to 30 mm on-site to accommodate varying part tolerances in machining clamps without swapping cylinders.
Variable Transfer Pusher
Trims the push-off stroke for different package sizes on a conveyor line, ensuring precise placement without reprogramming stops.
Adjustable Sealing Head
Fine-tunes the downstroke end position for sealing cartons of varying heights, preventing crush damage while maintaining pressure.
Is the Airtac SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S the Right Cylinder?
Size this 40 mm bore against its neighbors: the 32 mm yields 402 N push at 0.5 MPa, while the 50 mm provides 982 N, so choose the 40 mm when your 0.5 MPa working load is near 377 N. Pick this SAUJ model over a fixed-stroke SAU when your assembly tolerance or wear compensation requires field tuning of the extend stroke within the 250-280 mm range. Mounting options include Basic, FA flange, and LB foot styles, sharing compatibility with the AirTAC SC series. Because the -S magnet is present, you can directly mount CMSG, DMSG, or EMSG sensors. For this 280 mm stroke, ensure external guidance to prevent side-load binding.
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 SAUJ40 Adjustable Stroke Cylinder SAUJ40X280-30S FAQ
At 0.5 MPa it pushes 628 N and pulls 528 N. Push force is 879 N at 0.7 MPa, 1130 N at 0.9 MPa, and the theoretical max is 128 kgf at 1.0 MPa. The nominal 280 mm extend stroke can be shortened by up to 30 mm on-site using the external stop screw, yielding a 250-280 mm usable window.
The -S suffix means a magnet is built into the piston for direct mounting of CMSG, DMSG, or EMSG position switches. The cylinder does not hold a load on air loss; the stop screw and cushions only set position and decelerate, so use an external rod lock or pilot-operated check valve for secure load holding.
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