Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 95mm 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
- Stroke95 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40S
The AirTAC SAIJ125X95-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push thrust at 0.5 MPa and features a built-in magnet for position sensing with CMSE reed and DMSE electronic switches. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This model carries a 95mm nominal stroke that can be dialed back by up to 40mm, creating a precise 55-95mm usable travel window for product changeovers. It uses a PT tapered port thread and a robust 32mm carbon steel rod with an M27x2 thread, providing high side-load resistance without needing tie-rod construction.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 95 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 SAIJ125X95-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×95 | 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 SAIJ125X95-40S Is Used
Product Size Changeovers
Dial in the 55-95mm travel window during line changeovers to accommodate different package lengths without replacing the actuator.
End-Position Truing
Fine-tune the retract stop during machine commissioning to perfect tooling alignment under high 6136N thrust loads.
Adjustable Ejection
Vary the ejection stroke distance on heavy assemblies by adjusting the rear stopper, ensuring parts clear the machine safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40S the Right Cylinder?
Choose this 125mm bore when an application requires substantial force (6136N push at 0.5 MPa) but demands on-the-fly end-position tuning. If you need less force, stepping down to the 100mm bore yields 3927N push at 0.5 MPa. The 40mm adjustment range is ideal for adapting to varying product sizes without swapping the cylinder or bolting on external stops.
The rear adjuster acts purely as a travel stop and works with the air cushions to decelerate the load, but it does not hold the load without live air pressure. For dead-end holding, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. This SAIJ model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ125X95-40S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push thrust and 5734N of pull thrust. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to shorten the 95mm nominal stroke by up to 40mm, creating a usable travel window of 55-95mm. The adjuster acts as a mechanical stop to set the end position and must not be relied upon as a load-holding lock.
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