Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-40S 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 SAIJ100BX280-40S
The AirTAC SAIJ100X280-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 280 mm travel to a precise 240-280 mm window during commissioning. It delivers substantial thrust, providing 3927 N of push force at 0.5 MPa and reaching 7068 N at 0.9 MPa. This bore features a robust 25 mm piston rod and a G1/2 port to handle high flow rates efficiently.
This specific SKU includes a SUS304 stainless steel rod for superior corrosion resistance and an integrated magnet (-S) for position sensing with CMSE reed or DMSE electronic switches. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible mounting. The rear adjustment screw acts purely as a travel stop to fine-tune the retract end-position without swapping cylinders, but it does not lock the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-40S |
|---|---|
| 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 SAIJ100BX280-40S
| 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 SAIJ100BX280-40S Is Used
Variable End-Position Machining
Dial in the exact 240-280 mm travel window on machining fixtures to accommodate different part lengths without swapping out the entire cylinder assembly.
Product Changeover Lines
Rapidly adjust the retract stop during packaging line format changes, using the 40 mm trim range to handle varying box sizes on the fly.
Sensor-Ready Positioning
Leverage the integrated -S magnet with DMSE electronic sensors to verify end-of-stroke positions while fine-tuning the rear stopper during machine setup.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX280-40S the Right Cylinder?
Choose this 100 mm bore when an 80 mm cylinder's 2513 N push force at 0.5 MPa is insufficient, or step down from a 125 mm bore if you want a lighter, faster 30-800 mm/s moving assembly. The adjustable stroke is ideal for product changeovers on a line, letting you shift the end-stop by up to 40 mm without adding external stops.
When replacing an ISO 15552 cylinder, match the 280 mm stroke, 40 mm adjustment range, PT tapered port thread, and the -S magnet requirement. For strokes of 280 mm or more, the 25 mm rod and M20x1.5 thread handle high side loads, but an external guide is still recommended to prevent rod binding. If your application requires holding a load without continuous air pressure, select a SAIL pneumatic lock or BSAI clamp-lock cylinder instead of relying on the SAIJ adjuster.
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 SAIJ100BX280-40S FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 280 mm down to 240 mm. This allows precise end-position tuning at commissioning without adding external stops, though it does not hold the load without live air.
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