Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 280mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40
The AirTAC SAIJ100X280-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 5497N of push force at 0.7 MPa. Its 25mm piston rod and M20x1.5 rod thread provide robust resistance against side loads, while the extruded aluminum barrel features sensor grooves on both sides for flexible switch placement. This 100mm bore unit utilizes a PT tapered port thread and operates at speeds between 30 and 800 mm/s.
With a 280mm nominal stroke and a 40mm adjustment range, this model provides a usable travel window of 240 to 280mm. This built-in rear stopper allows you to fine-tune the retract end position during commissioning without swapping out the cylinder or adding external stops. The adjuster acts strictly as a travel stop and works alongside the variable air cushions at both ends to decelerate the load, but it does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100X280-40 Is Used
Product Changeover
Dial in the 240-280mm travel window during format changeovers on a packaging line, using the rear screw to set exact retract distances without changing hardware.
End-Position Tuning
Trim up to 40mm of stroke during machine commissioning to perfectly align heavy pressing or lifting motions, leveraging 5497N of thrust at 0.7 MPa.
Adjustable Material Handling
Handle varying workpiece sizes on an automated conveyor by adjusting the cylinder's extended stop position on the fly to accommodate different part lengths.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-40 the Right Cylinder?
Choose this 100mm bore cylinder when an application requires substantial thrust, such as 5497N push force at 0.7 MPa, alongside variable end-stop positioning. If you need to step down the force for a lighter payload, a 80mm bore neighbor provides 3518N push force at the same pressure. The adjustable stroke is ideal for machine setups requiring frequent product-size changeovers, offering a distinct advantage over a fixed-stroke SAI cylinder. To match this exact ISO 15552 replacement, verify the 280mm stroke, 40mm adjustment, PT port thread, and standard carbon steel rod.
Because the 280mm stroke is relatively long, ensure adequate external guiding to prevent excessive side-loading on the rod, despite the robust 25mm diameter. Remember that a plain SAIJ cylinder does not hold its position without continuous air pressure; the rear adjuster is a stop, not a lock. For applications requiring true load-holding without live air, consider an AirTAC SAIL pneumatic lock cylinder, a BSAI clamp-lock model, or an external rod lock. Mounting options for this series include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ100 Adjustable Cylinder SAIJ100X280-40 FAQ
At an operating pressure of 0.7 MPa, this 100mm bore cylinder provides a push force of 5497N and a pull force of 3681N. At 0.9 MPa, the push force increases to 7068N.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke from its 280mm nominal length down to 240mm. This creates a 240-280mm usable travel window for fine-tuning the end position during setup, but it does not lock the load without live air pressure.
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