Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75
The AirTAC SAIJ125X230-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its integrated 75mm adjustment screw allows you to trim the effective travel down from the 230mm nominal stroke, creating a precise 155-230mm usable window. This fine-tuning capability is ideal for dialing in end positions during commissioning without adding external stops.
Built with a carbon steel piston rod and PT tapered port threads, this extruded aluminum barrel design excludes tie-rods. The rear adjuster acts purely as a travel stop for deceleration alongside the standard air cushions, meaning it will not hold a load without live air pressure. For position holding, consider the SAIL or BSAI variants.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125X230-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125X230-75 Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 155-230mm window during machine commissioning without swapping out the entire actuator.
Product Size Changeover
Quickly adapt the stroke length on automated lines processing different sized parts by turning the rear adjustment screw.
Heavy Clamp Positioning
Leverage the 6136N push force to secure heavy workpieces while fine-tuning the clamping depth precisely to the material thickness.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-75 the Right Cylinder?
Selecting this 125mm bore cylinder makes sense when your application requires the 6136N thrust at 0.5 MPa but demands variable end-stops for product changeovers. If your setup only needs fixed travel, the standard SAI avoids the adjuster complexity, while stepping down to a 100mm bore drops the push force to 3927N. Because the nominal stroke is 230mm, an external guide is recommended to manage side-load on the 32mm rod.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 125mm bore, 230mm stroke, 75mm adjustment range, PT G1/2 port, and mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). No magnet is included, so position sensing requires a separate configuration.
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 SAIJ125X230-75 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides a push force of 6136N and a pull force of 5734N. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster screw lets you shorten the 230mm nominal stroke by up to 75mm, creating a usable travel window of 155 to 230mm. This stopper only sets the end position and does not lock the load without air pressure.
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