Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75S
The AirTAC SAIJ125X175-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 175 mm stroke that can be dialed back by up to 75 mm, yielding a precise 100 to 175 mm usable travel window for product changeovers. Equipped with a SUS420J2 stainless steel rod and a position-sensing magnet, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches via the dual-side sensor grooves on the extruded aluminum barrel.
This robust 125 mm bore generates 6136 N of pull force and 8590 N of push force at a 0.5 MPa operating pressure, peaking at 1251 kgf at 1.0 MPa. The rear adjuster acts strictly as a travel stop to fine-tune the end position without adding external stops, but it does not hold the load without live air. For load-holding requirements, a SAIL or BSAI variant is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125AX175-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SAIJ125AX175-75S Is Used
Variable Product Forming
Dial the retract stop back by 75 mm to accommodate shorter material blanks on a forming press, ensuring precise end-position tuning without mechanical rebuilds.
Machine Changeover
Quickly adjust the 100-175 mm travel window during line format changes, using the rear screw to set new end stops rapidly for different package sizes.
Heavy Assembly Clamping
Leverage the 8590 N push force at 0.5 MPa to secure heavy components during assembly, using the fine-tuned stroke to prevent over-travel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75S the Right Cylinder?
Choose this 125 mm bore when your application demands high force—stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N, whereas stepping up to a 160 mm bore yields 10053 N. The extensive 75 mm adjustment range is ideal for machines processing variable product sizes, allowing you to reposition the retract end-stop during setup rather than swapping the entire cylinder. The PT tapered port threads and SUS420J2 rod material are fixed attributes of this configuration.
Because the 175 mm stroke is below the 300 mm threshold, side-load risks are moderate, but the substantial 32 mm rod diameter and M27x2 thread handle higher bending loads well. If you need to hold a load in place without continuous compressed air, do not rely on the rear stopper or the air cushions; instead, specify a SAIL pneumatic lock or an external pilot-operated check valve. This model is dimensionally interchangeable per ISO 15552.
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 SAIJ125AX175-75S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder delivers 8590 N of push force and 6136 N of pull force. At the maximum 1.0 MPa pressure, it achieves a peak thrust of 1251 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the 175 mm nominal stroke by up to 75 mm, providing a usable travel window of 100 to 175 mm. It only decelerates and sets the travel end; it does not lock or hold the load without live air pressure.
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