Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30 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 SAIJ40BX450-30
The AirTAC SAIJ40X450-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 420-450mm usable travel window. Delivering 628N of push force at 0.5 MPa, it utilizes a SUS304 stainless steel rod for superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, allowing straightforward integration of CMSE or DMSE switches.
Equipped with PT tapered ports and a 16mm rod, this unit is built for precise end-position tuning without external stops. The rear adjuster acts purely as a travel stop to decelerate the load, meaning it will not hold position without live air pressure. For load-holding requirements, consider an external pilot-operated check valve or the SAIL lock series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30 |
|---|---|
| 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 SAIJ40BX450-30
| 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 SAIJ40BX450-30 Is Used
Changeover Calibration
Dial in the 420-450mm travel window during product size changeovers to set exact retraction distances without adding mechanical shims.
Diverting Mechanism
Fine-tune the stroke end position for pneumatic diverters on a packaging line, ensuring packages are pushed accurately.
Assembly Pressing
Adjust the rear stopper to set precise pressing depths for different component heights on a multi-model assembly station.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX450-30 the Right Cylinder?
Choose this 40mm bore when you need more power than the 32mm version (402N push at 0.5 MPa) but want a lighter footprint than the 50mm option (982N). The 30mm adjustment range is perfect for product changeovers, letting you dial in the exact end-stop without swapping cylinders. Because the total stroke is 450mm, the unsupported piston rod requires an external guide to prevent excessive side-loading and premature seal wear.
To match this ISO 15552 cylinder exactly, verify the 450mm stroke, 30mm adjustment, PT G1/4 port, and the SUS304 rod material. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. Since no magnet is specified, position sensing is not possible without modification.
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 SAIJ40BX450-30 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw lets you shorten the effective travel from the nominal 450mm down to 420mm. This stopper only sets the end position and decelerates the load; it does not lock the cylinder, so live air is required to hold position.
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