Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-30 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 SAIJ40BX150-30
The AirTAC SAIJ40X150-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 120-150 mm usable travel window. Delivering 879 N of push force at 0.7 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads.
The integrated rear stopper lets you fine-tune the retract end position during commissioning without adding external stops. This adjustable cylinder accepts Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, but omits FB, CA, CB, and CR options.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-30 |
|---|---|
| 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 SAIJ40BX150-30
| 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 SAIJ40BX150-30 Is Used
Machine Changeover
Dial in the 120-150 mm stroke window during product size changes without physically replacing the cylinder or shimming external stops.
End-Position Tuning
Fine-tune the retract position at commissioning to perfectly seat parts, absorbing mechanical tolerances directly via the rear screw.
Assembly Stations
Provide adjustable end-stops for pressing or locating operations where slight stroke variations are required between different fixtures.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-30 the Right Cylinder?
Choose this 40 mm bore when a 32 mm bore (402 N push at 0.5 MPa) lacks thrust or an 80 mm bore (2513 N at 0.5 MPa) is physically oversized. The 30 mm adjustment window is ideal for product changeovers, allowing you to dial in the exact end-of-stroke position on the fly rather than swapping to a fixed-length SAI cylinder.
Remember that the rear adjuster functions strictly as a travel stop, not a locking device; it cannot hold a load without live air pressure. For positive load-holding, select an AirTAC SAIL or BSAI cylinder 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 SAIJ40BX150-30 FAQ
The rear adjuster acts as a mechanical stop that shortens the 150 mm nominal stroke by up to 30 mm. This provides a usable travel window of 120-150 mm, allowing you to set the exact retract position during setup without changing the cylinder.
At 0.7 MPa, the SAIJ40X150-30 provides 879 N of push force and 740 N of pull force. It operates at speeds between 30 and 800 mm/s.
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