Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 750mm 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
- Stroke750 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100
The AirTAC SAIJ125X750-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 650 to 750 mm, allowing you to dial in the exact retract end-position during commissioning without adding external stops. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suited for heavy-duty positioning.
This model uses a PT tapered G1/2 port and a 32 mm carbon steel rod with an M27x2 thread. The extruded aluminum barrel includes sensor grooves on both sides. If you need position feedback, adding a magnet allows the use of AirTAC CMSE reed or DMSE electronic sensors. The rear adjuster acts purely as a travel stop for end-position tuning, not as a lock, so live air is required to hold the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 750 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 SAIJ125X750-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×750 | 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 SAIJ125X750-100 Is Used
Product Changeover
Dial in the 650-750 mm travel window during machine changeovers to accommodate varying product lengths without replacing the actuator.
Heavy Fixture Positioning
Leverage the 6136 N push force at 0.5 MPa to move large welding fixtures or heavy assembly platforms into their working positions.
Commissioning Fine-Tune
Use the 100 mm rear stopper screw to precisely set the retract end-position during initial setup, avoiding the need for external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N push at 0.5 MPa) lacks the necessary thrust, but a larger 160 mm bore (10053 N push) would be excessive. The 100 mm adjustment range is ideal for machinery requiring frequent product-size changeovers, letting you fine-tune the travel window precisely. Because it is an adjustable-stroke SAIJ rather than a fixed-stroke SAI, you can alter the effective stroke on the floor without physically swapping the cylinder.
With a 750 mm stroke, the 32 mm rod is highly susceptible to side-loading forces. An external guide mechanism is strongly recommended to prevent rod binding and premature seal wear. For applications requiring the load to be held in place without continuous air pressure, this cylinder is insufficient; consider an AirTAC SAIL air-released lock or BSAI clamp-lock cylinder instead. This model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ125X750-100 FAQ
At 0.5 MPa, this cylinder provides 6136 N of push force and 5734 N of pull force. The operating speed range for this 125 mm bore is 30-500 mm/s.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 100 mm, creating a usable travel window of 650 to 750 mm. It is a travel stop for end-position tuning, not a lock, and will not hold the load without live air pressure.
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