Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10
The AirTAC SAIJ125X140-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5MPa. It features an extruded aluminum barrel with sensor grooves on both sides and a SUS420J2 stainless steel rod. The integrated rear stopper allows you to fine-tune the effective travel window down to 130mm from the 140mm nominal stroke.
This adjustable design eliminates the need to swap cylinders or add external stops during commissioning. It uses PT tapered port threads (G1/2) and operates at speeds of 30-500mm/s. Remember that the rear adjuster acts only as a travel stop and does not lock the load without live air pressure; for load-holding, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAIJ125AX140-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAIJ125AX140-10 Is Used
Precision End-Stop Tuning
Dial in the exact clamping position on machining fixtures by trimming the stroke up to 10mm, ensuring perfect contact without reworking the mechanical stops.
Product Changeover
Quickly adjust the 130-140mm travel window to accommodate slightly different product sizes on the same line, minimizing downtime between production runs.
Heavy Forming Press
Leverage the 6136N push force at 0.5MPa for high-thrust forming operations while using the rear screw to prevent over-travel during setup.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10 the Right Cylinder?
Choose this 125mm bore when a smaller 100mm cylinder (providing 3927N push at 0.5MPa) lacks the necessary thrust, but you want to avoid stepping up to a 160mm unit. The 10mm adjustment range is ideal for dialing in exact end positions during machine setup or product changeovers, providing a 130-140mm travel window without replacing the entire actuator.
For a direct ISO 15552 replacement match, verify the 125mm bore, 140mm stroke, PT G1/2 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because this unit lacks the -S magnet option, it cannot host CMSE or DMSE sensors. The 32mm rod thread (M27x2) handles high side loads well, though any stroke over 300mm would require external guiding.
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 SAIJ125AX140-10 FAQ
It features a rear adjusting screw that acts as a mechanical stop, allowing you to shorten the effective stroke by up to 10mm. This creates a usable travel window of 130-140mm, which is set during commissioning without needing to swap the cylinder.
At 0.5MPa operating pressure, it provides 6136N of push force and 5734N of pull force. If you need higher thrust, increasing the pressure to 0.7MPa yields 8590N of push force.
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