Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30S 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 SAIJ40BX450-30S
The AirTAC SAIJ40X450-30-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 30 mm. This creates a highly useful 420-450 mm usable stroke window, letting you dial in the exact end position during commissioning without swapping out the entire actuator. It delivers 628 N of push force at 0.5 MPa and includes a SUS304 stainless steel rod for superior corrosion resistance.
Equipped with a magnet for position sensing, this variant works seamlessly with AirTAC CMSE reed and DMSE electronic sensors. It uses PT tapered port threads (G1/4) and relies on adjustable air cushions at both ends to decelerate the load. The rear adjuster functions purely as a travel stop, meaning it cannot hold the load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30S |
|---|---|
| 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 SAIJ40BX450-30S
| 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 SAIJ40BX450-30S Is Used
Machine Changeovers
Fine-tune the 420-450 mm travel window during product size transitions without physically replacing the cylinder or adding external stopper blocks.
Variable End Stops
Adjust the retract position on the fly for packaging or sorting lines that handle multiple package lengths on the same belt.
Corrosive Setup
Leverage the SUS304 stainless steel rod for positioning tasks in washdown or mildly corrosive environments where exact end-position tuning is required.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30S the Right Cylinder?
Choose this 40 mm bore actuator when your application requires 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore that provides 402 N, or down from a 50 mm bore yielding 982 N. The adjustable stroke is ideal for machine changeovers where the end-stop needs fine-tuning for varying product sizes, unlike a fixed-stroke SAI cylinder. Because the 450 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the M12x1.25 rod thread. For load-holding without live air, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is not a lock. This model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ40BX450-30S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 450 mm stroke by up to 30 mm, providing a 420-450 mm usable travel window. It only sets the end position and decelerates the load; it does not lock or hold the load without live air pressure.
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. The -S suffix indicates it has a built-in magnet for use with AirTAC CMSE reed and DMSE electronic sensors.
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