Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50S 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 SAIJ40BX475-50S
The AirTAC SAIJ40X475-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 16mm SUS304 stainless steel rod, making it highly suitable for environments where corrosion resistance is required. The integrated magnet allows for seamless position detection using CMSE reed or DMSE electronic sensors.
By turning the rear adjusting screw, you can trim the effective travel back by up to 50mm, creating a precise 425-475mm usable stroke window. This mechanism acts purely as a mechanical stop to set the end position and relies on the integrated air cushion for deceleration; it does not lock the load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50S |
|---|---|
| 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 SAIJ40BX475-50S
| 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 SAIJ40BX475-50S Is Used
Product Changeover
Dial in the 425-475mm travel window on the fly during packaging line format changes, accommodating different carton sizes without changing the cylinder.
End-Stop Calibration
Fine-tune the exact retract position during machine commissioning to prevent crashes, using the rear screw rather than adding external stopper blocks.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod for pushing or clamping tasks in humid or mildly corrosive manufacturing environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-50S the Right Cylinder?
Select this 40mm bore cylinder when an application requires fine-tuning the retract end-position during commissioning or product changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder. If your setup demands greater thrust, stepping up to the 50mm bore yields 982N at 0.5 MPa, while dropping down to the 32mm bore provides 402N. To guarantee exact ISO 15552 interchangeability, verify the 475mm stroke, 50mm adjustment range, PT tapered port threads, and the -S magnet option.
Because the 475mm stroke is relatively long, the 16mm rod needs external guiding to prevent excessive side-loading and premature seal wear. For any load-holding requirements without constant air pressure, note that this adjuster is only a stop; you must integrate an external rod lock or explore the AirTAC SAIL or BSAI locking cylinder series.
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 SAIJ40BX475-50S FAQ
At 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. The operational speed range is 30-800 mm/s.
The rear adjuster acts as a mechanical stop that allows you to shorten the 475mm nominal stroke by up to 50mm, resulting in a usable travel window of 425-475mm. It sets the end position but does not hold the load without live air pressure.
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