Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40
The AirTAC SAIJ40X150-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 150 mm travel back by up to 40 mm. This creates a highly versatile 110-150 mm usable stroke window, allowing you to dial in the exact retract end-position during commissioning without swapping out the cylinder or adding external stops. It delivers 628 N of push force at 0.5 MPa, making it a solid choice for moderate-duty actuation.
Built with a SUS304 stainless steel rod for superior corrosion resistance, this model utilizes a PT tapered port thread for a reliable seal. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear adjuster acts purely as a mechanical stop to set the travel end, meaning it will not hold a load safely without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 SAIJ40BX150-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 SAIJ40BX150-40 Is Used
Machine Changeover
Dial in the 110-150 mm travel window during product size transitions to set new retract positions without changing hardware.
End-Position Tuning
Fine-tune the exact end-of-stroke stop during commissioning to absorb mechanical tolerances in a new fixture.
Corrosive Environments
The SUS304 stainless steel rod provides reliable actuation in washdown or mildly corrosive manufacturing settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40 the Right Cylinder?
Choose this 40 mm bore when your application requires a 628 N push force at 0.5 MPa, stepping up from the 32 mm bore that provides 402 N. The adjustable 110-150 mm stroke window is ideal for machine setups requiring variable end-stops or frequent product-size changeovers, offering flexibility a fixed-stroke SAI cannot match. If your process demands true load-holding without live air pressure, the SAIJ adjuster will not act as a brake; consider an AirTAC SAIL or BSAI cylinder instead.
To match this ISO 15552 dimensionally interchangeable cylinder for a direct replacement, verify the 40 mm bore, 150 mm nominal stroke, 40 mm adjustment range, PT port thread, and the SUS304 rod material. Because the nominal stroke is under 300 mm, external guide rail support is typically not required for the 16 mm rod diameter, though standard side-load limits still apply.
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 SAIJ40BX150-40 FAQ
At a 0.5 MPa operating pressure, the 40 mm bore provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 128 kgf.
The rear adjuster acts as a mechanical stop that shortens the nominal 150 mm stroke by up to 40 mm. This gives you an adjustable travel window of 110 to 150 mm to fine-tune the end position without replacing the cylinder.
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