Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-40
The AirTAC SAIJ125X75-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5MPa. With a nominal 75mm stroke and a 40mm adjustment range, it provides a usable travel window of 35-75mm, allowing you to fine-tune the retract end position at commissioning without adding external stops.
This model features a SUS420J2 stainless steel rod for corrosion resistance and utilizes PT tapered port threads (G1/2). It supports a speed range of 30-500mm/s and offers a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125AX75-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125AX75-40 Is Used
Variable End-Stop Tuning
Dial in the exact retract distance from 35 to 75mm during machine setup to accommodate different product sizes without swapping the cylinder.
Changeover Commissioning
Use the rear screw to fine-tune end positions on packaging lines, eliminating the need to bolt on external physical stops during product changeovers.
Heavy-Duty Positioning
Leverage the 6136N thrust at 0.5MPa to move heavy pallets or fixtures, relying on the built-in air cushion and stopper to decelerate the load smoothly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX75-40 the Right Cylinder?
Choose this 125mm bore when 80mm falls short, offering 2513N push at 0.5MPa compared to this model's 6136N. The 40mm adjustable stroke is ideal for variable end-stops during product changeover, unlike a fixed-stroke SAI cylinder. For strokes of 75mm, side-load is minimal, but always guide long unsupported loads. The rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, select a 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 SAIJ125AX75-40 FAQ
The rear adjuster allows you to trim the effective travel back by up to 40mm. This creates a usable stroke window of 35-75mm, letting you set the exact retract end position during commissioning without replacing the cylinder.
It provides 6136N of push force and 5734N of pull force at 0.5MPa. The rear adjuster is only a travel stop, not a lock, so it will not hold the load without live air pressure; for load-holding, use a SAIL or BSAI cylinder.
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