Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30
The AirTAC SAIJ125X90-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its 90mm nominal stroke can be dialed back by up to 30mm, creating a precise 60-90mm usable travel window for exact end-position tuning during commissioning. The extruded aluminum barrel features sensor grooves on both sides, allowing straightforward installation of CMSE or DMSE switches if a magnet is specified later.
Featuring a 32mm carbon steel rod and an M27x2 rod thread, this robust pneumatic actuator handles demanding dynamic loads while operating at speeds of 30-500mm/s. The PT tapered port threads ensure a secure, leak-free connection. This model utilizes adjustable air cushions at both ends to decelerate the load smoothly, though the rear mechanical stopper and cushions only set the travel end and do not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 SAIJ125X90-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 SAIJ125X90-30 Is Used
Product Changeovers
Dial in the 60-90mm travel window during format changes on a packaging line without physically swapping the actuator or adding shims.
Heavy Pressing
Leverage the 6136N push force at 0.5 MPa for heavy-duty pressing operations while fine-tuning the exact bottoming position at commissioning.
Machine Setup
Use the rear mechanical stopper to establish precise end-stops during initial machine build, allowing on-the-fly adjustments for optimal timing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30 the Right Cylinder?
Select this 125mm bore actuator when an application requires high thrust—such as 6136N push at 0.5 MPa—combined with variable end-stop positioning. If the 60-90mm adjustable travel window exceeds your space constraints, stepping down to a 100mm bore provides 3927N push force at 0.5 MPa. Conversely, heavier loads requiring up to 10053N push at 0.5 MPa would necessitate moving up to a 160mm bore. The adjustable-stroke design is ideal for machine setups requiring frequent product-size changeovers, eliminating the need to swap cylinders or add external stops.
For a direct ISO 15552 replacement match, verify the 125mm bore, 90mm stroke, 30mm adjustment range, PT port threads, and standard carbon steel rod. Mounting options for this series include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations. Because the rear adjuster acts solely as a travel stop and not a locking device, applications requiring load-holding without continuous air pressure should utilize an external rod lock, a pilot-operated check valve, or transition to an AirTAC SAIL or BSAI 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 SAIJ125X90-30 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster allows you to shorten the 90mm nominal stroke by up to 30mm, providing a usable travel window of 60-90mm. This stopper only sets the travel end and does not lock the load without live air pressure.
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