Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-100
The AirTAC SAIJ125X230-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5MPa. It features a SUS420J2 stainless steel rod and PT tapered ports. The integrated rear stopper allows you to trim the nominal 230mm stroke back by up to 100mm, creating a highly versatile 130-230mm usable travel window for precise positioning.
This adjustable travel capacity is ideal for product changeovers, letting you fine-tune end positions at commissioning without swapping the cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Remember that the rear adjuster acts only as a travel stop and deceleration point, not a lock, so it will not hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125AX230-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125AX230-100 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance within the 130-230mm window during machine commissioning to accommodate different material lengths without external stopper blocks.
Product Size Changeover
Rapidly adjust the stroke by up to 100mm when switching the production line to a new package or part size, minimizing downtime between runs.
Heavy-Duty Forming
Leverage the 6136N push force at 0.5MPa for pressing and forming operations while retaining the flexibility to tweak the bottoming position on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-100 the Right Cylinder?
Choose this 125mm bore when you need substantial thrust, such as 6136N push at 0.5MPa, but want to avoid stepping up to the 160mm bore which offers 10053N. The generous 100mm adjustment range makes it superior to a fixed-stroke SAI cylinder for lines running multiple product sizes, as the end-stop can be dialed in on the fly. To match this cylinder for an ISO 15552 replacement, specify the 125mm bore, 230mm stroke, PT port thread, SUS420J2 rod, and the required mounting kit.
Because the 230mm stroke is relatively long, the 32mm rod diameter requires external guiding to prevent excessive side-loading on the seals. For applications requiring the load to be held mechanically without air pressure, a plain SAIJ is insufficient; consider an AirTAC SAIL pneumatic lock or an external rod lock instead.
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 SAIJ125AX230-100 FAQ
It features a rear adjusting screw that acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 100mm. This creates a usable travel window of 130-230mm, which can be fine-tuned during setup without changing the cylinder.
At 0.5MPa operating pressure, it provides 6136N of push force and 5734N of pull force. If higher pressure is available, it can deliver up to 8590N push at 0.7MPa.
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