Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50 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 SAIJ40BX475-50
The AirTAC SAIJ40X475-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 425-475mm usable travel window. Delivering 628N of push force at 0.5 MPa, it is equipped with a SUS304 stainless steel rod for corrosion resistance and PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a 16mm rod and M12x1.25 thread to handle side loads, though the 475mm stroke length still requires an external guide to prevent rod bending. The rear adjuster acts purely as a travel stop for end-position tuning and must not be confused with a locking device.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50 |
|---|---|
| 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 SAIJ40BX475-50
| 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 SAIJ40BX475-50 Is Used
Machine Setup Tuning
Dial in the exact 425-475mm retract position during initial machine commissioning without swapping out the entire cylinder.
Product Size Changeover
Quickly adjust the end-stop by up to 50mm to accommodate varying package lengths on a packaging line.
Variable End-Stop Positioning
Fine-tune the stroke end-point on the fly to align tooling precisely, using the rear screw as a dedicated travel stop.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50 the Right Cylinder?
Choose this adjustable model over a fixed SAI cylinder when you need to fine-tune the retract end-position during commissioning or product changeover without adding external stops. If your application requires higher force, stepping up to a 50mm bore provides 982N of push force at 0.5 MPa. For load-holding without live air pressure, the SAIJ adjuster will not suffice; you must use a SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
To match this ISO 15552 interchangeable cylinder, verify the 40mm bore, 475mm stroke, 50mm adjustment range, PT port threads, and standard mounting options (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is 475mm, always support the load with an external guide to manage side-load stresses.
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 SAIJ40BX475-50 FAQ
At an operating pressure of 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. It can deliver up to 1130N of push force at 0.9 MPa.
The rear adjuster screw allows you to shorten the nominal 475mm stroke by up to 50mm, giving an adjustable travel window of 425-475mm. This stopper only sets the end position and does not hold the load without air pressure.
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