Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-40S 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 SAIJ40BX475-40S
The AirTAC SAIJ40X475-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down to 435 mm from its 475 mm nominal stroke. Delivering 628 N of push force at 0.5 MPa, it uses a G1/4 port and a 16 mm rod. The -S magnet enables position feedback via AirTAC CMSE reed and DMSE electronic sensors.
This specific SKU is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance. The rear adjustment screw acts purely as a mechanical stop to dial in the end position during commissioning without adding external stops; it is not a locking device and will not hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-40S |
|---|---|
| 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 SAIJ40BX475-40S
| 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 SAIJ40BX475-40S Is Used
Product Changeover
Dial in the 435-475 mm travel window during format changes without physically replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract stroke at machine commissioning to hit exact mechanical stops, compensating for minor sensor or fixture offsets.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod for light assembly tasks in environments where standard carbon steel rods might face moisture.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX475-40S the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires 628 N push force at 0.5 MPa, which steps up from the 32 mm bore offering 402 N. The 40 mm adjustment range is ideal for product changeovers on a line, allowing operators to set variable end-stops on the fly instead of physically swapping out a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, you must look to the SAIL or BSAI series, as the SAIJ adjuster only restricts travel.
Because the 475 mm stroke is relatively long, the 16 mm rod and M12x1.25 thread still require an external guide to prevent excessive side-loading and rod bending. To replace this ISO 15552 cylinder, specify: 40 mm bore, 475 mm stroke, 40 mm adjustment, PT tapered port threads, SUS304 (B) rod material, and the -S magnet option.
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 SAIJ40BX475-40S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N push force at its maximum 0.9 MPa pressure.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the usable travel from 475 mm down to a minimum of 435 mm. This stopper only sets the end position; it does not lock or hold the load without live air pressure.
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