Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm 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.
- BoreØ125 mm
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-10S
The AirTAC SAIJ125X280-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force and 5734N of pull force at 0.5 MPa, making it suited for heavy-duty positioning tasks. The integrated -S magnet enables position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors housed in the dual-side extruded aluminum barrel grooves.
This model features a 280mm nominal stroke that can be fine-tuned down by up to 10mm via the rear stopper screw, creating a precise 270-280mm usable travel window. It uses a PT tapered port thread and a robust 32mm carbon steel rod with an M27x2 thread. The rear adjuster acts purely as a mechanical stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 280 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | 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 SAIJ125 Adjustable Cylinder SAIJ125X280-10S Is Used
Machine Changeover
Dial in the 270-280mm travel window during product size changes without swapping the cylinder or repositioning hard stops.
Heavy Press Fitting
Leverage 6136N of push force at 0.5MPa to seat heavy components while fine-tuning the final 10mm of retraction.
Variable End Stops
Set precise retract positions on automated assembly lines using the rear adjuster screw instead of external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X280-10S the Right Cylinder?
Select this 125mm bore cylinder when an application requires 6136N of push force at 0.5MPa but demands exact end-position tuning during commissioning without adding external stops. If you need less force, stepping down to an 80mm bore yields 2513N, while upgrading to a 160mm bore provides 10053N for heavier loads. Because the stroke is 280mm, an external guide is recommended to manage side loading on the 32mm rod. For load-holding without continuous air pressure, a plain SAIJ is insufficient; consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
This adjustable-stroke profile cylinder is dimensionally interchangeable per ISO 15552 mounting interfaces. To match this exact replacement, verify the 125mm bore, 280mm stroke, 10mm adjustment range, PT port thread, and the -S magnet option. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR configurations.
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 SAIJ125 Adjustable Cylinder SAIJ125X280-10S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjusting screw acts as a mechanical stop that lets you trim the effective stroke back by up to 10mm, providing a 270-280mm usable travel window. It sets the end position but does not lock or hold the load without live air pressure.
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