Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-75 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 SAIJ125X95-75
The AirTAC SAIJ125X95-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. By integrating a 75 mm adjustment range into a 95 mm nominal stroke, this unit provides an effective usable travel window of 20 to 95 mm. This allows operators to dial in the exact retract position at commissioning without swapping out the cylinder or adding external mechanical stops.
Belonging to the 125 mm bore class, it delivers substantial thrust, generating 6136 N of pull force at 0.5 MPa and 8590 N at 0.7 MPa. It features a PT tapered port and a robust 32 mm carbon steel rod with an M27x2 thread, which handles high side loads effectively. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-75 |
|---|---|
| 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 SAIJ125X95-75
| 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 SAIJ125X95-75 Is Used
Machine Changeover
Quickly reconfigure the retract end-stop during product size changeovers without replacing the cylinder or reengineering the fixture.
End-Position Tuning
Dial in the exact 20-95 mm travel window during commissioning to perfect seating forces and avoid mechanical hard crashes.
Variable End Stops
Ideal for automated lines where the rear stop position must be adjusted on the fly to accommodate varying workpiece dimensions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X95-75 the Right Cylinder?
Choose this adjustable-stroke model over a fixed-stroke SAI when your application requires variable end-stops or frequent product-size changeovers on the line. If your thrust requirements are lower, stepping down to a 100 mm bore yields 3681 N of pull force at 0.5 MPa, providing a lighter, faster 30-800 mm/s cycle. Conversely, if you need higher forces, the 160 mm bore offers 9425 N of pull at 0.5 MPa.
When matching an ISO 15552 replacement, verify the 125 mm bore, 95 mm stroke, 75 mm adjuster, PT port threads, and the standard carbon steel rod. Because the nominal stroke is under 300 mm, side-load risks are moderate, but long unsupported loads should still use an external guide. Remember that the rear adjuster acts only as a travel stop to fine-tune deceleration; it does not hold the load without live air. For true position holding without pneumatic pressure, consider an AirTAC SAIL lock or BSAI clamp-lock cylinder.
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 SAIJ125X95-75 FAQ
At 0.5 MPa, the 125 mm bore provides 6136 N of pull force and 5734 N of push force. If you increase the operating pressure to 0.7 MPa, it delivers 8590 N of push force.
The rear adjuster screw lets you shorten the 95 mm nominal stroke by up to 75 mm, creating a usable travel window of 20 to 95 mm. It functions as a mechanical stop to set the end position, not as a load-holding lock.
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