Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30S
The AirTAC SAIJ125X90-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 6136N push force at 0.5MPa and a usable travel window of 60-90mm, letting you dial back the 90mm nominal stroke by up to 30mm during commissioning. This built-in stopper eliminates the need to swap cylinders or bolt on external stops when fine-tuning end positions.
Equipped with a -S magnet for CMSE reed or DMSE solid-state sensors, it integrates seamlessly into position-monitoring setups. The extruded aluminum barrel includes sensor grooves on both sides, and the unit ships with a SUS420J2 stainless steel rod (option A) alongside PT tapered port threads.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 SAIJ125AX90-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 SAIJ125AX90-30S Is Used
Heavy Press Fine-Tuning
Dial in the exact 60-90mm travel window during machine setup for precision pressing tasks without physically swapping out the actuator.
Product Changeover Stops
Adjust the retract end-position on the fly to handle different package sizes moving down a heavy-duty conveyor line.
Automated Assembly Clamping
Leverage the 6136N thrust at 0.5MPa to hold large workpieces, using the rear screw to set the precise clamp depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-30S the Right Cylinder?
Choose this 125mm bore when your application requires heavy thrust beyond the 3927N push of a 100mm cylinder at 0.5MPa. The 30mm adjustment range is ideal for product changeovers, providing a variable end-stop without needing a fixed-stroke SAI cylinder. Since the maximum standard stroke for this bore is 1500mm, the 90mm travel is well within standard limits.
For load-holding requirements without live air pressure, note that the rear adjuster acts only as a travel stop, not a lock. In such cases, consider an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR.
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 SAIJ125AX90-30S FAQ
At 0.5MPa it delivers 6136N push and 5734N pull. At 0.7MPa the push increases to 8590N, with a maximum push of 11045N at 0.9MPa.
The rear adjuster acts as a mechanical stop that trims the 90mm nominal stroke back by up to 30mm, creating a 60-90mm usable travel window. It sets the end position but does not lock the load without live air.
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Standard models usually ship in 3-4 days.
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