Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10S
The AirTAC SAIJ125X145-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the travel window between 135 and 145 mm during commissioning. Belonging to the 125 mm bore class, it delivers a robust 6136 N push force and 5734 N pull force at 0.5 MPa. This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a magnet for position sensing.
The rear adjuster functions purely as a mechanical stop to trim the retract end-position, meaning it does not hold the load without live air pressure. For load-holding without continuous air, consider the SAIL or BSAI series instead. This extruded aluminum profile cylinder supports a speed range of 30-500 mm/s and uses PT tapered ports sized at G1/2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAIJ125AX145-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125AX145-10S Is Used
Machine Setup & Changeover
Dial in the exact retract distance within the 135-145 mm window during product size transitions without physically replacing the actuator.
Variable End-Stop Tuning
Use the rear adjusting screw to fine-tune the end-of-stroke position at commissioning, absorbing mechanical tolerances in the fixture.
Heavy Forming Press
Leverage the 6136 N push force at 0.5 MPa for pressing or holding heavy assemblies, tuning the stroke to prevent over-travel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10S the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder's 2513 N push force at 0.5 MPa is insufficient, but stepping up to a 160 mm bore is unnecessary. The adjustable 10 mm stroke is ideal for product changeovers on packaging lines, letting you dial in the exact end-stop without swapping the cylinder or adding external stops. To match this exact replacement, specify: 125 mm bore, 145 mm stroke, 10 mm adjustment, PT G1/2 ports, SUS420J2 rod material, and the -S magnet option. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Because the stroke is under 300 mm, side-load risks are moderate, but the 32 mm rod diameter and M27x2 thread provide a rigid assembly that still benefits from an external guide for heavy loads. The integrated magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors mounted in the dual-side barrel grooves.
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 SAIJ125AX145-10S FAQ
The rear adjusting screw acts as a mechanical stop that lets you trim the effective stroke back by up to 10 mm, providing a usable travel window of 135 to 145 mm. It sets the end position but does not lock or hold the load without continuous air pressure.
At 0.5 MPa, it generates 6136 N of push force and 5734 N of pull force. At the maximum operating pressure of 1.0 MPa, the push force reaches 11045 N.
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