Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 280mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-100
The AirTAC SAIJ40X280-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 180-280mm usable travel window from its 280mm nominal stroke. Delivering 628N of push force at 0.5MPa, it handles mid-range pneumatic tasks effectively.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and includes PT tapered port threads. The rear adjuster acts as a mechanical stop to fine-tune end positions at commissioning, but it does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 SAIJ40 Adjustable Cylinder SAIJ40BX280-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×280 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-100 Is Used
Machine Changeover
Dial in the rear stopper to quickly adjust end positions when switching product sizes on a shared line.
End-Position Tuning
Trim the effective stroke within the 180-280mm window during commissioning without adding external stops.
Corrosive Assembly
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-100 the Right Cylinder?
Choose this adjustable model over a fixed SAI cylinder when you need to dial in the exact end-stop during machine setup or product changeover. If your application requires less force, stepping down to a 32mm bore yields 402N at 0.5MPa; for heavier loads, a 50mm bore provides 982N. Because the 280mm stroke is relatively long, ensure you use an external guide to prevent excessive side-loading on the rod. For load-holding without continuous air pressure, consider an external rod lock or the SAIL series, as the SAIJ adjuster is not a brake. This cylinder is dimensionally interchangeable per ISO 15552, configured with PT ports, and lacks a magnet for sensors.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/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/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-100 FAQ
The rear adjuster allows you to mechanically shorten the stroke by up to 100mm, providing a usable travel window of 180-280mm. It functions purely as a travel stop and does not lock or hold the load without live air pressure.
At a 0.5MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. It can reach up to 1130N of push force at 0.9MPa.
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