Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-100S 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 SAIJ40BX450-100S
The AirTAC SAIJ40X450-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 450 mm travel that can be dialed back by up to 100 mm, creating a 350-450 mm usable window for precise end-position tuning during commissioning. Delivering 628 N of push force and 528 N of pull force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance.
This unit includes a magnet for CMSE and DMSE sensors, utilizing dual sensor grooves on the extruded aluminum barrel. The rear adjustment screw acts purely as a travel stop to fine-tune the retract end without adding external stops; it does not lock the load without live air pressure. For position holding without continuous air, an external rod lock or related types like SAIL or BSAI are required.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-100S |
|---|---|
| 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 SAIJ40BX450-100S
| 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 SAIJ40BX450-100S Is Used
Product Changeover
Dial in the 350-450 mm travel window on the fly to accommodate different material lengths without physically replacing the cylinder.
Commissioning Tuning
Fine-tune the retract end position during initial machine setup to align tooling perfectly using the rear 100 mm adjustment screw.
Variable End Stops
Adjust the stopping point on a packaging line to handle varying package sizes without adding bulky external mechanical stops.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-100S the Right Cylinder?
Choose this 40 mm bore when an application requires fine-tuning of the retract stroke within a 350-450 mm window, such as during machine setup or product changeover. If your setup needs less push force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa. Conversely, stepping up to a 50 mm bore provides 982 N. Because the 450 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the 16 mm rod and M12x1.25 thread.
The rear stopper allows variable end-stops without swapping the cylinder, unlike a fixed-stroke SAI model. To ensure exact ISO 15552 dimensional interchangeability, match the 40 mm bore, 450 mm stroke, 100 mm adjustment, PT tapered ports, and the -S magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ40BX450-100S FAQ
The rear adjuster acts as a travel stop, allowing you to shorten the effective stroke from 450 mm down to 350 mm. This provides a 350-450 mm usable window for fine-tuning the end position without changing the cylinder itself.
At an operating pressure of 0.5 MPa, the SAIJ40X450-100-S provides a push force of 628 N and a pull force of 528 N. The maximum push force reaches 1130 N at 0.9 MPa.
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