Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-75
The AirTAC SAIJ125X150-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136 N of push force at 0.5 MPa. It features a 32 mm carbon steel rod and a PT G1/2 port. By utilizing the 75 mm adjustment range, you can dial the effective travel back from its 150 mm nominal length down to a 75 mm minimum, creating a highly flexible 75-150 mm usable window.
This built-in rear stopper allows precise end-position tuning during commissioning or product changeovers without swapping out the entire cylinder. The extruded aluminum barrel includes sensor grooves on both sides, though this configuration omits the magnet, meaning CMSE or DMSE switches cannot be used without adding the -S option. The adjuster acts purely as a travel stop and does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125X150-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAIJ125X150-75 Is Used
Variable End-Stop Tuning
Perfect for applications requiring frequent retract position changes, allowing operators to trim the stroke back by up to 75 mm to accommodate different material thicknesses.
Product Size Changeover
Enables rapid line changeovers on packaging or handling equipment by adjusting the travel window from 150 mm down to 75 mm without disassembling the actuator.
Commissioning Calibration
Provides a mechanical method to fine-tune the end-of-stroke position during machine setup, preventing the need for external shims or custom spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-75 the Right Cylinder?
Choose this 125 mm bore when you need significantly more thrust than the 80 mm bore provides (2513 N push at 0.5 MPa), but less than the massive 160 mm bore (10053 N). The 75 mm adjustment range is exceptionally wide, making it ideal for machines running multiple product sizes where the retract end-stop frequently changes. Because it is an adjustable-stroke model, you can fine-tune the travel window on the fly instead of relying on a fixed-length SAI cylinder.
When matching this for an ISO 15552 replacement, verify the 150 mm stroke, 75 mm adjustment code, PT G1/2 port, and your required mounting style from the available Basic, FA, LB, TC, FTC, TCM1, and TCM2 set. Note that SAIJ omits the FB, CA, CB, and CR mounts. For any load-holding requirements without continuous air pressure, this cylinder is insufficient; you must integrate an external pilot-operated check valve or specify a SAIL or BSAI locking cylinder instead.
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 SAIJ125X150-75 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke from the 150 mm nominal length down to as little as 75 mm. This gives a usable travel window of 75-150 mm, though it only stops the piston; it does not lock the load without live air.
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