Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10
The AirTAC SAIJ40X400-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end position during commissioning. With a 400 mm nominal stroke and a 10 mm adjustment range, it provides a usable travel window of 390-400 mm without requiring external stops. The extruded aluminum barrel features sensor grooves on both sides for flexible switch placement.
Delivering 628 N of push force at 0.5 MPa, this 40 mm bore unit utilizes a SUS304 stainless steel rod for superior corrosion resistance. It operates at speeds of 30-800 mm/s and uses a PT tapered G1/4 port. The rear screw acts purely as a travel stop for deceleration and positioning, meaning it will not hold a load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAIJ40BX400-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SAIJ40BX400-10 Is Used
Machine Changeover
Dial in the exact 390-400 mm end stop during product size changes without machining new hard stops or replacing the cylinder.
Diversion Positioning
Fine-tune the extended position of a diverter arm on a packaging line to accommodate varying package widths on the fly.
End-Stop Calibration
Trim the final 10 mm of travel during machine commissioning to perfectly sync the tooling arrival with a moving web.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10 the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires precise end-position tuning within a 390-400 mm window, avoiding the need to swap physical components during product changeovers. If your setup demands less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa; conversely, a 50 mm bore provides 982 N for heavier loads. Because the 400 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the SUS304 rod. For applications requiring true load-holding without live air, consider the SAIL or BSAI locking cylinder variants, as the SAIJ adjuster is not a brake. This model is dimensionally interchangeable per ISO 15552 and accepts Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ40BX400-10 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. If operated at 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective travel by up to 10 mm, creating a 390-400 mm usable window. It functions as a physical stop to set the end position and does not lock the load without live air.
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