Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10S
The AirTAC SAIJ40X450-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel by up to 10 mm, creating a precise 440-450 mm usable window. Delivering 628 N of push force at 0.5 MPa, it is equipped with a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread for a robust pneumatic seal. An integrated magnet enables position sensing with CMSE reed and DMSE electronic switches.\n\nThis adjustable-stroke design allows for fine end-position tuning at commissioning or during product changeovers without swapping the cylinder or adding external stops. The 16 mm carbon steel core combined with the M12x1.25 rod thread handles side loads well, but because the 450 mm stroke is relatively long, an external guide is still recommended to prevent rod deflection. The rear adjuster acts purely as a travel stop to set the retract end, not as a lock, meaning it will not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 450 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 SAIJ40BX450-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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 SAIJ40BX450-10S Is Used
Machine Setup & Changeover
Dial in the exact 440-450 mm retract position during product size changeovers without machining new external stopper blocks.
Variable End-Stop Positioning
Fine-tune the end-of-stroke location on multi-stage assembly lines where minor positional offsets are needed at commissioning.
Long-Travel Diverting
Accommodate slight timing or position variations on long-stroke diverting arms while maintaining ISO 15552 mounting interchangeability.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-10S the Right Cylinder?
Choose this 40 mm bore when your application requires less thrust than the 50 mm bore (982 N at 0.5 MPa) but more than the 32 mm bore (402 N at 0.5 MPa). The 10 mm adjustment range is specifically useful for dialing in a variable end-stop during machine setup, offering a clear advantage over a fixed-stroke SAI cylinder when exact retract distances fluctuate.\n\nThis SAIJ40X450-10-S configuration includes a PT port thread, SUS304 stainless steel rod, and a -S magnet for CMSE/DMSE sensors. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 450 mm stroke exceeds 300 mm, always use an external guide to support the load and minimize rod wear. For applications requiring true load-holding without live air, consider the SAIL air-released lock or BSAI clamp-lock cylinders instead of relying on the rear stopper.
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 SAIJ40BX450-10S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 450 mm nominal stroke by up to 10 mm, providing a usable travel window of 440-450 mm. It sets the end position but does not lock or hold the load without live air pressure.
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