Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-75S 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 SAIJ125AX290-75S
The AirTAC SAIJ125X290-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 215 to 290 mm. It features a SUS420J2 stainless steel rod and a PT tapered port. Generating 6136 N of pull force at 0.5 MPa, it is built for heavy-duty positioning. The integrated magnet supports CMSE reed and DMSE electronic sensors for exact end-of-travel detection.
This adjustable-stroke design allows precise end-position tuning during commissioning without adding external stops. The rear adjuster acts purely as a travel stop, meaning it will not hold the load without live air pressure. For secure load-holding, consider the SAIL or BSAI series. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-75S |
|---|---|
| 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 SAIJ125AX290-75S
| 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 SAIJ125AX290-75S Is Used
Product Changeovers
Dial the stroke back by up to 75 mm to accommodate varying package sizes on a packaging line without physically swapping the cylinder.
Machine Setup
Fine-tune the end position during commissioning to align heavy 6136 N push forces perfectly with the tooling.
Variable End Stops
Set precise retract positions on demand using the rear screw, avoiding the need to bolt on external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-75S the Right Cylinder?
Choose this 125 mm bore cylinder when an application demands high force combined with variable end stops, such as 6136 N pull at 0.5 MPa. If your setup requires less force, stepping down to an 80 mm bore yields 2268 N pull. The 75 mm adjustment range is ideal for product-size changeovers on a line, whereas a fixed SAI cylinder locks you into a single 290 mm stroke. Because the 290 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the M27x2 rod thread.
For an exact ISO 15552 replacement, match the 125 mm bore, 290 mm nominal stroke, 75 mm adjuster, PT G1/2 port, and the -S magnet requirement. Remember that the rear adjuster and air cushions only decelerate the travel end; they do not function as a lock. If the load must be held without live air, use a SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
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 SAIJ125AX290-75S FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa the push force increases to 8590 N.
The rear adjuster allows you to shorten the 290 mm nominal stroke by up to 75 mm, giving an adjustable travel window of 215 to 290 mm. The adjuster acts as a travel stop and does not lock the load without live air.
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