Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 125mm 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.
- BoreØ100 mm
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20
The AirTAC SAIJ100X125-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 105 to 125 mm. Delivering 5497 N of push force at 0.7 MPa, it handles demanding workloads while allowing precise end-position tuning during commissioning without swapping out the entire unit. The extruded aluminum barrel features sensor grooves on both sides for flexible switch placement.
This configuration incorporates a SUS420J2 stainless steel rod for enhanced corrosion resistance and utilizes PT tapered port threads with a G1/2 connection. The 25 mm rod diameter and M20x1.5 rod thread provide a robust interface capable of handling greater side loads, though external guides remain recommended for optimal performance. The rear stopper acts purely as a travel limit and does not hold the load without continuous live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×125 | 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 SAIJ100 Adjustable Cylinder SAIJ100AX125-20 Is Used
Product Changeovers
Dial in the 105-125 mm travel window during format changes on packaging lines, avoiding the need to physically swap cylinders for different package sizes.
End-Position Tuning
Fine-tune the retract end-position at machine commissioning to achieve exact contact timing, using the rear screw rather than adding external mechanical stops.
Heavy Forming
Leverage the 5497 N push force at 0.7 MPa for pressing or holding operations where the exact bottoming position requires slight in-field adjustment.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX125-20 the Right Cylinder?
Selecting this 100 mm bore cylinder makes sense when your application requires the 5497 N push force at 0.7 MPa and benefits from variable end stops. If your setup demands less force, stepping down to an 80 mm bore yields 3518 N at 0.5 MPa push; stepping up to a 125 mm bore provides 8590 N at 0.7 MPa. The adjustable stroke is ideal for product-size changeovers on a line, offering a 20 mm trim range that eliminates the need to bolt on external stops. To match this exact specification for an ISO 15552 replacement, verify the 125 mm stroke, 20 mm adjustment, PT port thread, and the specific mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is under 300 mm, side-load concerns are minimal, but always ensure proper alignment. Note that for load-holding without live pressure, you must look to the SAIL or BSAI series, as the SAIJ adjuster is not a lock.
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 SAIJ100 Adjustable Cylinder SAIJ100AX125-20 FAQ
At an operating pressure of 0.7 MPa, this 100 mm bore cylinder provides a push force of 5497 N and a pull force of 3681 N. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster screw allows you to shorten the nominal 125 mm stroke by up to 20 mm, creating a usable travel window of 105 to 125 mm. This stopper only sets the travel end and does not lock the load without live air.
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