Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-50S 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 SAIJ125AX90-50S
The AirTAC SAIJ125X90-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136 N of push force at 0.5 MPa. With a nominal 90 mm stroke and a 50 mm adjustment range, it provides a usable travel window of 40 to 90 mm. This allows you to dial in the exact retract end-position during commissioning without swapping out the cylinder or fabricating external stops.
Built with a SUS420J2 stainless steel rod (option A) for superior corrosion resistance, this model includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting, and the PT tapered ports ensure a tight pneumatic connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-50S |
|---|---|
| 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 SAIJ125AX90-50S
| 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 SAIJ125AX90-50S Is Used
Product Changeovers
Quickly modify the retract distance by up to 50 mm to accommodate different product lengths on the same production line without changing hardware.
Press Fit Tuning
Fine-tune the exact end-stop position during machine commissioning to achieve perfect pressing depth and prevent damage to components.
Variable End Stops
Use the 40-90 mm adjustable travel window to set precise material feed lengths or clamping positions in heavy-duty automated assembly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-50S the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires the 6136 N push force at 0.5 MPa and on-the-fly end-position tuning. If you need less force, stepping down to an 80 mm bore yields 2513 N push at 0.5 MPa, while moving up to a 160 mm bore provides 10053 N. The 50 mm adjustment window is ideal for product-size changeovers on a line, offering flexibility that a fixed-stroke SAI cylinder cannot match.
For any load-holding requirements, remember that the rear adjuster functions strictly as a travel stop and does not lock the rod without live air pressure; for secure holding, consider an AirTAC SAIL or BSAI model. When replacing an ISO 15552 cylinder, match the 125 mm bore, 90 mm stroke, 50 mm adjustment, PT ports, and the -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX90-50S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective stroke back from the 90 mm nominal length, creating a 40 to 90 mm usable travel window. It only sets the travel end and does not lock the load without live air pressure.
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