Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10S
The AirTAC SAIJ125X900-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and a built-in magnet for CMSE reed and DMSE electronic sensors. With a nominal 900mm stroke and a 10mm adjustment range, it provides an exact 890-900mm usable travel window for precision end-position tuning.
This adjustable-stroke design allows you to fine-tune the retract position at commissioning without swapping the cylinder or adding external stops. The rear adjuster acts purely as a travel stop to set the end position and relies on the standard air cushion for deceleration; it does not hold the load without live air. For load-holding requirements without continuous air pressure, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAIJ125AX900-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SAIJ125AX900-10S Is Used
Precision End-Stop Tuning
Dial in the exact 890-900mm retract position during machine commissioning to achieve precise alignment without machining external stoppers.
Product Changeover
Quickly adjust the stroke end by up to 10mm on packaging lines when handling slightly different product lengths, minimizing downtime.
Heavy Load Positioning
Leverage the 6136N push force to move and position heavy pallets or fixtures, using the fine adjustment to perfect the resting state.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX900-10S the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push at 0.5 MPa) lacks the force for heavy positioning, but a 160mm bore (10053N) would be excessive. The adjustable 890-900mm travel window is ideal for applications requiring exact end-stop calibration during machine setup or product changeover, offering more flexibility than a fixed-stroke SAI cylinder. When replacing an ISO 15552 cylinder, match the 900mm stroke, 10mm adjustment, PT tapered G1/2 port, and the -S magnet requirement.
Because the 900mm stroke is long and the 32mm rod is heavily loaded, an external guide is strongly recommended to prevent excessive side-loading and premature seal wear. The SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ125AX900-10S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster screw allows you to trim the effective stroke within an 890-900mm travel window. It acts as a mechanical stop to fine-tune the end position at commissioning, but it is not a lock and cannot hold the load without live air pressure.
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