Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40 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 SAIJ125X95-40
The AirTAC SAIJ125X95-40 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 32mm carbon steel piston rod with an M27x2 thread, paired with PT tapered port threading (G1/2) and 40mm variable air cushions at both ends. This robust configuration handles heavy loads while maintaining a standard 30-500mm/s operating speed.
With a nominal stroke of 95mm and a 40mm adjustment range, this model provides a usable travel window of 55-95mm. You can fine-tune the retract end-position during commissioning or product changeovers without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE reed or DMSE electronic sensors later if positioning feedback becomes necessary.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40 |
|---|---|
| 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 SAIJ125X95-40
| 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 SAIJ125X95-40 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 55 and 95mm during machine commissioning to accommodate different material thicknesses without physically swapping cylinders.
Heavy Product Changeover
Leverage the 6136N thrust at 0.5 MPa to push heavy pallets or chassis components, quickly adjusting the 40mm travel window for new product lengths on the assembly line.
Precision Pressing Operations
Utilize the 40mm variable air cushion and rear mechanical stopper to fine-tune the pressing depth of heavy components, ensuring repeatable results without over-travel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-40 the Right Cylinder?
Choose this 125mm bore when a 100mm cylinder (providing 3927N push at 0.5 MPa) lacks the thrust for your application, but before stepping up to the massive 160mm bore (10053N). The 40mm adjustment range is ideal for dialing in exact end stops on varying product sizes, replacing the need to swap out a fixed-stroke SAI cylinder for every minor format change. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
Remember that the rear adjuster functions strictly as a travel stop to set deceleration, not as a locking device. A plain SAIJ cannot hold a load without continuous live air pressure; for fail-safe load holding, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve. Because the 95mm stroke is relatively short for this large bore, side-load risks are minimal, but you should still ensure the M27x2 rod thread is properly aligned to prevent premature seal wear.
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 SAIJ125X95-40 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder generates 6136N of push force and 5734N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 8590N.
The rear adjuster acts as a mechanical stopper that allows you to shorten the effective stroke from its 95mm nominal length down to as little as 55mm. This provides a 55-95mm usable travel window for fine-tuning the end position during setup.
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