Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30 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 SAIJ125AX175-30
The AirTAC SAIJ125X175-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 175 mm travel by up to 30 mm for a precise 145-175 mm usable window. It delivers 6136 N of push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This variant features a SUS420J2 stainless steel rod for enhanced corrosion resistance and utilizes PT tapered port threads with a G1/2 connection. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE or DMSE switches if a magnet is added later.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30 |
|---|---|
| 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 SAIJ125AX175-30
| 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 SAIJ125AX175-30 Is Used
Machine Changeover
Quickly fine-tune the 145-175 mm travel window during product size transitions on heavy packaging lines without replacing hardware.
Heavy Press Positioning
Leverage the 6136 N push force at 0.5 MPa to move substantial jigs into exact alignment before a secondary operation begins.
End-Stop Calibration
Use the 30 mm rear adjuster to precisely set the retract distance during initial commissioning, avoiding the need for external stopper blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks thrust, but an 80 mm bore is too small. The 30 mm adjustment range is perfect for fine-tuning retract end positions during machine setup or product changeovers without swapping the cylinder. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
The rear adjuster acts strictly as a travel stop and does not hold the load without live air; for fail-safe load holding, consider an external rod lock or the SAIL series. Because the stroke is 175 mm, ensure external guiding is used if the application induces significant side loads.
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 SAIJ125AX175-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 175 mm down to as little as 145 mm, giving you a 145-175 mm window to fine-tune the end position during setup.
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