Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10S
The AirTAC SAIJ125X290-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and features a 280-290mm usable travel window, allowing you to trim the effective stroke by up to 10mm without swapping hardware. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet supports CMSE reed and DMSE electronic solid-state switches for precise position detection.
This model utilizes an SUS420J2 stainless steel rod (code A) for improved corrosion resistance and pairs with PT tapered port threads. The rear adjuster acts strictly as a travel stop for end-position tuning, meaning it does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 290 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 SAIJ125AX290-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×290 | 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 SAIJ125AX290-10S Is Used
Product Changeover
Dial in the 280-290mm travel window during packaging line format changes to accommodate slightly different carton depths without replacing the cylinder.
End-Stop Calibration
Fine-tune the final retracted position of a heavy press or lifting fixture during machine commissioning to achieve exact mechanical alignment.
Variable End Positioning
Adjust the rear stop screw by up to 10mm to compensate for mechanical wear or slight material thickness variations in automated assembly tooling.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10S the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push at 0.5MPa) lacks the necessary thrust, but a 160mm bore (10053N) would be excessive. The 10mm adjustable window is ideal for applications requiring slight end-position corrections during commissioning or product changeovers, avoiding the need to bolt on external stops. As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with standard ISO 15552 mounting interfaces and uses the SAIJ mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
Because the 290mm stroke creates a long lever arm on the 32mm rod, an external guide is recommended to prevent excessive side-loading. To match this exact replacement, specify: 125mm bore, 290mm stroke, 10mm adjustment, PT port, SUS420J2 rod, and the -S magnet. The operating speed is rated for 30-500mm/s.
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 SAIJ125AX290-10S 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 adjuster screw allows you to reduce the nominal 290mm stroke by up to 10mm, creating a 280-290mm usable travel window. It functions as a mechanical stop for end-position tuning and is not a locking device.
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