Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75 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 SAIJ125AX175-75
The AirTAC SAIJ125X175-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 100 to 175 mm. Delivering a substantial 8590 N push force at 0.7 MPa, it is built to handle heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, ready to accept CMSE reed or DMSE electronic sensors if a magnet is specified later.
This model features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and utilizes PT tapered port threads. The rear adjustment screw acts purely as a mechanical stop to fine-tune the retract end position during commissioning; it does not lock the load. For genuine fail-safe load holding without live air pressure, an external rod lock or a related SAIL pneumatic locking cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75 |
|---|---|
| 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 SAIJ125AX175-75
| 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 SAIJ125AX175-75 Is Used
Variable End-Stop Machining
Dial in the retract distance from 100 to 175 mm during machine setup to machine different part lengths without changing out the entire actuator assembly.
Product Changeover Diverter
Quickly reposition a heavy conveyor sorting gate by adjusting the rear stopper, adapting the line to varying package sizes on the fly.
Heavy Clamp Positioning
Set the exact clamping reach for large industrial assemblies, using the 8590 N output force to secure components while fine-tuning the final end position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-75 the Right Cylinder?
Selecting this 125 mm bore makes sense when your application requires the 8590 N output at 0.7 MPa, bridging the gap between the 5497 N push of a 100 mm cylinder and the 14074 N thrust of a 160 mm unit. The 75 mm adjustment range is ideal for product changeovers on a packaging line, allowing operators to dial in a new retract distance between 100 and 175 mm without physically swapping the cylinder or adding external stops.
When replacing an ISO 15552 cylinder, verify the 125 mm bore, 175 mm nominal stroke, PT port threads, and the specific mounting accessory. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Because the 175 mm stroke is below the 300 mm threshold, side-load concerns are minimal, though the robust 32 mm rod and M27x2 thread naturally handle high mechanical stress.
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 SAIJ125AX175-75 FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. At the maximum rated pressure of 1.0 MPa, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to trim the effective stroke back by up to 75 mm from the 175 mm nominal length, creating a usable travel window of 100 to 175 mm. The adjuster functions as a travel stop to set the end position and does not lock or hold the load without continuous air pressure.
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