Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20S 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 SAIJ100X280-20S
The AirTAC SAIJ100X280-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers robust thrust, pushing 5497N at 0.7MPa and 7068N at 0.9MPa. By turning the rear stopper screw, you can trim the nominal 280mm travel back by up to 20mm, creating a precise 260-280mm usable stroke window for exact end-position tuning at commissioning.
This -S variant includes a piston magnet for position sensing with AirTAC CMSE reed or DMSE electronic switches fitted into the dual-side sensor grooves. The extruded aluminum barrel uses a G1/2 port and M20x1.5 rod thread. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear adjuster acts purely as a travel stop to set deceleration endpoints and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20S |
|---|---|
| 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 SAIJ100X280-20S
| 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 SAIJ100X280-20S Is Used
Machine Changeover
Dial in the 260-280mm retract stop during product size changes on a packaging line, ensuring precise end-position tuning without physically swapping the actuator.
Assembly Pressing
Leverage the 7068N push force at 0.9MPa for seating bearings or components, using the rear screw to fine-tune the exact depth of the press stroke.
End-Stop Calibration
Use the 20mm adjustment window to perfectly set the retracted position during initial commissioning, compensating for mechanical tolerances in the fixture.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X280-20S the Right Cylinder?
Choose this 100mm bore when 80mm falls short—delivering 5497N push at 0.7MPa versus the 80mm bore's 3518N. An adjustable-stroke cylinder is selected over a fixed SAI when you need to fine-tune the retract endpoint during machine setup or product changeover without swapping the cylinder or adding external stops. For load-holding without continuous air pressure, this adjuster will not suffice; consider an SAIL air-released lock, a BSAI clamp-lock, or an external rod lock.
Because the 280mm stroke is substantial, the M20x1.5 rod thread and 25mm rod diameter carry significant side loads, but an external guide is still recommended to prevent binding over this long travel. To match this ISO 15552 interchangeable cylinder, specify: 100mm bore, 280mm stroke, 20mm adjustment, PT port thread, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and the -S magnet option.
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 SAIJ100X280-20S FAQ
At 0.9MPa operating pressure, the 100mm bore provides a push force of 7068N and a pull force of 3681N. At 0.7MPa, it delivers 5497N of push force.
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 280mm stroke by up to 20mm, providing a usable travel window of 260-280mm. It sets the end position and deceleration point, but it does not lock or hold the load without live air pressure.
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