Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100S 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 SAIJ125AX140-100S
The AirTAC SAIJ125X140-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the 140 mm nominal stroke by up to 100 mm. This creates a wide 40-140 mm usable travel window, perfect for accommodating multiple product sizes on the same machine without physically swapping the actuator. It delivers 6136 N of push force at 0.5 MPa.
This specific SKU features a SUS420J2 stainless steel rod (code A) for superior corrosion resistance and includes a piston magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel provides sensor grooves on both sides, and the unit operates at speeds of 30-500 mm/s.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100S |
|---|---|
| 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 SAIJ125AX140-100S
| 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 SAIJ125AX140-100S Is Used
Machine Format Changeover
Leverage the 40-140 mm travel window to quickly adapt end positions for different product lengths on a packaging line without changing the cylinder.
Precision End-Stop Tuning
Fine-tune the exact retraction point during machine commissioning to achieve perfect mechanical timing without adding external shims.
Heavy-Duty Positioning
Use the 6136 N push force to move heavy pallets or fixtures, relying on the stainless steel rod for durability in demanding industrial environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-100S the Right Cylinder?
Selecting this 125 mm bore actuator provides 6136 N of thrust at 0.5 MPa, bridging the gap between the 80 mm bore (2513 N) and the 160 mm bore (10053 N). You would choose this adjustable-stroke SAIJ over a fixed SAI when a production line requires frequent format changeovers, allowing operators to set precise variable end-stops during commissioning rather than relying on external stopper blocks.
This model is configured with PT tapered ports and supports the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR. Because the 140 mm stroke is relatively short, side-load concerns are minimal, but the 32 mm rod and M27x2 thread handle robust mechanical stresses. Remember that the rear adjuster is a travel stop, not a lock; it will not hold the load without live air pressure, so for fail-safe load holding, consider an external rod lock or the SAIL/BSAI series.
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 SAIJ125AX140-100S 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 the maximum pressure of 1.0 MPa, it can deliver up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the nominal 140 mm down to as little as 40 mm. This creates a 40-140 mm adjustable travel window, but note that the adjuster only sets the end position; it does not lock or hold the load without continuous air pressure.
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