Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20 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 SAIJ40BX150-20
The AirTAC SAIJ40X150-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 130 to 150 mm, allowing you to dial back the nominal 150 mm stroke by up to 20 mm during commissioning without adding external stops. It features a SUS304 stainless steel rod and PT tapered ports.
Delivering 628 N of push force and 528 N of pull force at 0.5 MPa, this bore size is ideal for mid-range actuation. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. The rear adjuster acts purely as a travel stop to fine-tune end positions and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20 |
|---|---|
| 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 SAIJ40BX150-20
| 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 SAIJ40BX150-20 Is Used
Product Changeover
Quickly reconfigure the 130-150 mm travel window on packaging lines when switching between different carton sizes without swapping cylinders.
End-Position Tuning
Fine-tune the retract stroke during machine setup to perfect alignment and avoid mechanical crashes at the commissioning stage.
Variable End Stops
Adjust the stopping point on conveyor sorting gates to handle varying product lengths dynamically on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20 the Right Cylinder?
Choose this adjustable SAIJ model over a fixed-stroke SAI when your application requires variable end-stops or frequent product-size changeovers. If you need less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa, while moving up to a 50 mm bore provides 982 N. Because the 150 mm stroke is under 300 mm, side-load risks are moderate, but external guides are still recommended for heavy lateral loads.
This cylinder is dimensionally interchangeable per ISO 15552. To match this exact configuration, specify a 40 mm bore, 150 mm stroke, 20 mm adjustment, PT port thread, SUS304 (B) rod material, and no magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. For load-holding without live air pressure, consider the SAIL or BSAI series 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 SAIJ40 Adjustable Cylinder SAIJ40BX150-20 FAQ
At 0.5 MPa operating pressure, the 40 mm bore provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective travel from 150 mm down to 130 mm. This creates a 20 mm adjustable window for fine-tuning the end position without replacing the cylinder.
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