Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-100S
The AirTAC SAIJ125X155-100-S 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 155mm nominal stroke that can be fine-tuned backward by up to 100mm, creating a highly flexible 55-155mm usable travel window. This wide adjustment band is ideal for product changeovers, letting you dial in the exact end position without swapping hardware.
This SKU is built with a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and fluid control is managed via a PT tapered G1/2 port.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 155 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 SAIJ125AX155-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×155 | 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 SAIJ125AX155-100S Is Used
Product Changeover
Quickly adapt machinery for varying package sizes by dialing the stroke back from 155mm to 55mm, eliminating the need to physically swap cylinders during line transitions.
End-Position Calibration
Fine-tune the retract distance during machine commissioning to achieve exact positioning without adding external mechanical stops or machining custom spacers.
Heavy-Duty Forming
Leverage the 6136N push force for pressing or holding applications where the exact material compression distance needs on-the-fly adjustment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX155-100S the Right Cylinder?
Select this 125mm bore cylinder when an application requires substantial thrust—up to 6136N push and 5734N pull at 0.5 MPa—alongside variable end-stop positioning. If your setup needs less force, stepping down to the 100mm bore yields 3927N; if you require more power, the 160mm bore provides 10053N. The rear screw mechanism on this SAIJ model allows precise end-position tuning at commissioning, which is far more efficient than machining external stops or buying a fixed-stroke SAI cylinder for every product variant.
When integrating this actuator, note that the rear adjuster and the variable air cushions act strictly as travel stops and deceleration devices; they do not hold the load without live air. For fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 155mm stroke is below the 300mm threshold, side-load stress is minimal, though the robust 32mm rod and M27x2 thread handle standard loads effectively.
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 SAIJ125AX155-100S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 100mm from the 155mm nominal length, providing a usable travel window of 55 to 155mm. The adjuster acts as a mechanical stop to set the precise end position.
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