Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10S
The AirTAC SAIJ125X450-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 440 to 450 mm. Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore actuator handles heavy-duty positioning. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet enables precise tracking with CMSE reed or DMSE electronic solid-state switches.
This model features an SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and utilizes PT tapered port threads (G1/2). The 10 mm adjustment screw lets you fine-tune the retract end position at commissioning without adding external stops. Note that this rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAIJ125AX450-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAIJ125AX450-10S Is Used
Product Size Changeovers
Quickly dial in the 440-450 mm travel end-stop during format changes on packaging lines without physically replacing the cylinder.
Heavy Press Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy assemblies, using the fine 10 mm adjustment to perfect the clamping position.
Automated Machine Setup
Use the rear screw to establish exact end-of-stroke positions during initial commissioning, avoiding the need for external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-10S the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder lacks thrust; the 80 mm bore yields 2513 N at 0.5 MPa, whereas this SAIJ125X450-10-S provides 6136 N. An adjustable stroke is ideal for product-size changeovers on a line, allowing you to dial in the exact 440-450 mm end position rather than swapping a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, you must integrate an external pilot-operated check valve or switch to an AirTAC SAIL or BSAI locking cylinder, as the SAIJ adjuster is not a brake.
Because the 450 mm stroke is substantial, the 32 mm rod diameter and M27x2 rod thread still require external guidance to prevent excessive side-loading on the seals. This actuator supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. It operates at speeds of 30-500 mm/s and is dimensionally interchangeable per ISO 15552.
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 SAIJ125AX450-10S 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 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the nominal 450 mm stroke by up to 10 mm, creating a usable travel window of 440 to 450 mm. This stopper only sets the end position and does not lock the load without live air.
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