Airtac SAIJ40 Adjustable Cylinder SAIJ40BX425-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX425-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 425mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke425 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX425-10
The AirTAC SAIJ40X425-10 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 879N of push force at 0.7 MPa. It features a SUS304 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
With a nominal stroke of 425 mm and a 10 mm adjustment range, this model provides a usable travel window of 415-425 mm. This allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX425-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX425-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 425 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX425-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×425 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX425-10 Is Used
Changeover Calibration
Dial in the 415-425 mm retract end-stop during product size changes without physically remounting the actuator.
Diverting Arms
Fine-tune the stroke distance on packaging lines to accommodate varying carton widths on the fly.
End-Stop Trimming
Eliminate mechanical hard stops by using the built-in 10 mm rear screw to set the exact end position.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX425-10 the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires 879N push force at 0.7 MPa, stepping up from a 32 mm bore (563N) or down from a 63 mm bore (2182N). The 10 mm adjustable window is ideal for fine-tuning retract positions during product changeovers, offering more setup flexibility than a fixed-stroke SAI cylinder. Because the stroke is 425 mm, an external guide is recommended to support the load and mitigate side-load stress on the rod.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 425 mm stroke, 10 mm adjustment, PT G1/4 port, and your required mounting set (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that SAIJ omits the FB, CA, CB, and CR mounts. For load-holding without live air, consider an AirTAC SAIL or BSAI cylinder instead of relying on the adjuster.
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 SAIJ40 Adjustable Cylinder SAIJ40BX425-10 FAQ
At 0.7 MPa, this 40 mm bore cylinder provides 879N of push force and 738N of pull force. It can reach a maximum push force of 1130N at 0.9 MPa.
The rear adjuster screw lets you trim the effective travel back by up to 10 mm, creating a 415-425 mm usable window. It functions as a mechanical stop for end-position tuning and is not a locking device.
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