Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 475mm 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
- Stroke475 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75
The AirTAC SAIJ40X475-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel within a 400-475 mm window. Delivering 879N of push force at 0.7 MPa, it is engineered for applications requiring exact end-position tuning without swapping hardware. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This unit is configured with a SUS304 stainless steel rod for superior corrosion resistance and utilizes a PT tapered port thread. Because the 475 mm stroke is relatively long, the 16 mm rod diameter and M12x1.25 rod thread provide robust support, though an external guide is still recommended to manage side loads. The rear adjustment screw acts purely as a travel stop for commissioning flexibility, not as a load-holding lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 475 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 SAIJ40BX475-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×475 | 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 SAIJ40BX475-75 Is Used
Product Changeovers
Dial in the retraction point across a 400-475 mm window to accommodate different product lengths on the same line without mechanical rebuilds.
Machine Setup
Fine-tune the end-of-stroke position during commissioning to achieve precise alignment, eliminating the need for external shims.
Variable End Stops
Use the rear adjuster to set exact retraction distances for multi-format tooling, ensuring accurate positioning for each specific task.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-75 the Right Cylinder?
Choose this adjustable-stroke model over a fixed SAI when your application requires variable end-stops or frequent product-size changeovers, allowing precise retraction tuning without adding external stops. If your process requires less force, stepping down to a 32 mm bore yields 563N at 0.7 MPa; stepping up to a 50 mm bore provides 1374N. For load-holding without live air pressure, this cylinder is insufficient as the adjuster is only a stop—consider an SAIL or BSAI series. This configuration features a PT port, SUS304 rod, and no magnet.
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 SAIJ40BX475-75 FAQ
At an operating pressure of 0.7 MPa, this 40 mm bore cylinder provides 879N of push force and 528N of pull force. At 0.5 MPa, the push force is 628N.
The rear adjuster acts as a stopper that allows you to shorten the nominal 475 mm stroke by up to 75 mm, creating a usable travel window of 400 to 475 mm. It decelerates the travel end but does not hold the load without live air.
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