Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-75
The AirTAC SAIJ125X140-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 65 to 140 mm, allowing you to dial back the nominal 140 mm stroke by up to 75 mm during machine setup. Belonging to the 125 mm bore class, it delivers a robust 6136 N push force at 0.5 MPa and 8590 N at 0.7 MPa.
This model is built with a SUS420J2 stainless steel piston rod (option A) for improved corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE solid-state switches if a magnet is added later. The rear adjuster acts purely as a mechanical stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAIJ125AX140-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAIJ125AX140-75 Is Used
Product Changeover
Quickly adapt end-stops for varying package sizes on a packaging line without physically replacing the cylinder.
Commissioning Calibration
Fine-tune the 65 to 140 mm travel window during initial machine setup to dial in exact retract positions.
Press Fitment
Manage heavy press operations with 6136 N of force at 0.5 MPa while setting precise end-position limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-75 the Right Cylinder?
Select this 125 mm bore cylinder when your application requires 6136 N of push force at 0.5 MPa, which is a notable step up from the 80 mm bore class that provides 2513 N under the same pressure. If your force requirements are lower, stepping down to a 100 mm bore yields 3927 N. The adjustable stroke is ideal for product changeovers on a line, letting you fine-tune the retract end-position without swapping cylinders or adding external stops. For holding loads without live air, consider an AirTAC SAIL or BSAI series cylinder instead, as the SAIJ adjuster is not a lock. When matching ISO 15552 replacements, confirm the 140 mm stroke, 75 mm adjustment, PT G3/8 port, and your mounting choice from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or 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 SAIJ125AX140-75 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
The SAIJ125X140-75 has a nominal 140 mm stroke with a rear adjusting screw that allows you to trim the travel back by up to 75 mm. This creates a usable travel window of 65 to 140 mm, letting you set the exact end-position without changing the cylinder.
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