Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10
The AirTAC SAIJ125X240-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and PT tapered port threads. The built-in adjuster creates a usable travel window between 230 and 240 mm, allowing precise end-position tuning without swapping components.
This adjustable stopper is ideal for product-size changeovers on a packaging line, letting you dial in the exact 10 mm trim during commissioning. The rear screw acts purely as a travel stop and does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 240 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 SAIJ125AX240-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×240 | 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 SAIJ125AX240-10 Is Used
Machine Changeover
Dial in the 230-240 mm travel window during product size transitions to set precise retract positions without adding external stops.
Heavy Clamping
Leverage 6136N of push force at 0.5 MPa to secure heavy workpieces while fine-tuning the clamping depth by up to 10 mm.
Assembly Stations
Adjust the end-stop on the fly during line commissioning to perfect part seating without replacing the entire actuator.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires heavy thrust (6136N push at 0.5 MPa) alongside a variable end-stop. If your force requirements are lower, stepping down to a 100 mm bore yields 3927N, while stepping up to a 160 mm bore provides 10053N. The adjustable stroke is chosen over a fixed SAI model when fine-tuning the retract position is necessary at machine setup.
To replace an ISO 15552 cylinder, match the 125 mm bore, 240 mm stroke, 10 mm adjustment, PT port thread, and mounting style. Available mounts include Basic, FA, LB, TC, FTC, TCM1, and TCM2. As this model lacks a magnet, it cannot host CMSE or DMSE sensors without the -S 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 SAIJ125 Adjustable Cylinder SAIJ125AX240-10 FAQ
At 0.5 MPa operating pressure, this 125 mm 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 acts as a mechanical stop that trims the effective travel. For this 240 mm stroke model, you can reduce the stroke by up to 10 mm, creating a usable travel window of 230 to 240 mm.
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