Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10
The AirTAC SAIJ125X290-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the retract end position. It provides a usable travel window of 280-290 mm, letting you dial in the exact end stop during machine setup without adding external stops. It delivers 6136 N of push force at 0.5 MPa, making it suited for moving heavy loads.
This unit is built with a SUS420J2 stainless steel rod for corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for CMSE or DMSE switches. Note that the rear adjuster acts purely as a travel stop for deceleration, not a lock, so it will not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 290 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 SAIJ125AX290-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×290 | 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 SAIJ125AX290-10 Is Used
Machine Setup Tuning
Dial in the exact retract position during initial commissioning to hit a hard stop within the 280-290 mm window.
Product Changeover
Quickly adjust the end-of-stroke position by up to 10 mm when line product sizes change without replacing the actuator.
Heavy Material Handling
Leverage 6136 N of push force at 0.5 MPa to move heavy pallets or fixtures while fine-tuning the travel limit.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-10 the Right Cylinder?
Choose this 125 mm bore when 80 mm is insufficient, as 80 mm yields 2513 N of push force at 0.5 MPa compared to 6136 N here. An adjustable stroke is ideal for product changeovers where the retract position needs a 10 mm tweak without swapping cylinders. For load-holding without live air, use an external rod lock or pilot-operated check valve. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Because the 290 mm stroke exceeds 300 mm, ensure you use an external guide to handle side loads. To match an ISO 15552 replacement, verify the 125 mm bore, 290 mm stroke, 10 mm adjuster, PT G1/2 port, and mounting style.
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 SAIJ125AX290-10 FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa the push force increases to 8590 N.
A rear adjusting screw acts as a stopper, allowing you to shorten the nominal 290 mm stroke back to 280 mm. It sets the travel end and deceleration, but does not lock the load without live air.
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