Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10S
The AirTAC SAIJ125X950-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the retract end position. With a nominal 950 mm stroke and a 10 mm adjustment range, it provides a usable travel window of 940-950 mm. This bore size delivers substantial thrust, offering 8590 N push force at 0.7 MPa, making it suitable for heavy-duty handling.
The barrel is extruded aluminum with sensor grooves on both sides, and this -S variant includes a magnet for position detection via CMSE reed or DMSE electronic sensors. The carbon steel rod and M27x2 thread provide robust load handling, while the PT tapered port ensures a tight pneumatic seal. The rear adjuster acts purely as a travel stop for commissioning precision, not as a lock to hold loads without live air.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 950 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 SAIJ125X950-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×950 | 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 SAIJ125X950-10S Is Used
Heavy Press Tuning
Dial in the exact 940-950 mm end position during heavy press commissioning to accommodate material thickness variations without adding external mechanical stops.
Automated Line Changeover
Adjust the retract distance up to 10 mm rapidly during product size changeovers on a high-force assembly line, minimizing downtime between production runs.
Long-Stroke Guiding
Handle large structural components over a 950 mm travel distance, utilizing the integrated external guide compatibility to manage heavy side loads.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-10S the Right Cylinder?
Choose this 125 mm bore when your application requires higher force than a 100 mm cylinder (which provides 5497 N at 0.7 MPa) but does not necessitate the extreme output of a 160 mm bore. The adjustable stroke is ideal for machine setups requiring variable end-stops or fine-tuning during product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder. For dimensionally interchangeable ISO 15552 replacements, match the 950 mm stroke, 10 mm adjustment, PT G1/2 port, and -S magnet.
Because the stroke is 950 mm, the extended rod is highly susceptible to side-loading and deflection; an external guide mechanism is strongly recommended to prevent premature seal wear. If your application requires the load to be held securely in place without continuous air pressure, note that this cylinder's adjuster and air cushions function only as stops and deceleration, so you should explore an SAIL or BSAI locking cylinder instead.
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 SAIJ125X950-10S FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder provides a push force of 8590 N and a pull force of 5734 N. The maximum thrust at 1.0 MPa is 1251 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 10 mm, creating a 940-950 mm usable travel window. This stopper fine-tunes the end position during setup but does not lock the load without live air pressure.
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