Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 550mm 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
- Stroke550 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-100S
The AirTAC SAIJ40X550-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 100 mm. This creates a precise 450-550 mm usable stroke window, letting you dial in the exact end position at commissioning without swapping out the barrel or adding external stops. Belonging to the 40 mm bore class, it delivers 879 N of push force at 0.7 MPa.
This variant is equipped with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing. It works seamlessly with AirTAC CMSE reed and DMSE solid-state switches fitted into the dual-side sensor grooves. The 16 mm rod and M12x1.25 thread provide a robust interface, while the PT tapered ports ensure a tight pneumatic connection.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 550 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 SAIJ40BX550-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×550 | 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 SAIJ40BX550-100S Is Used
Machine Changeover
Fine-tune the 450-550 mm travel window during product size transitions without physically replacing the cylinder or adding external stopper blocks.
Sensor-Driven Positioning
Leverage the integrated magnet with DMSE solid-state sensors to confirm the adjusted retract position in automated assembly lines.
Corrosive Setup Tuning
Rely on the SUS304 stainless steel rod and 879 N push force for precise end-position tuning in environments requiring high corrosion resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-100S the Right Cylinder?
Choose this 40 mm bore when you need more force than a 32 mm cylinder (which provides 563 N at 0.7 MPa) but want to avoid the bulk of a 50 mm option. The adjustable stroke is ideal for product changeovers or variable end-stop requirements, functioning as a travel stop rather than a lock. Because the nominal stroke is 550 mm, an external guide is strongly recommended to manage side loads and prevent rod deflection. For applications requiring the cylinder to hold a load without live air pressure, this adjuster will not suffice; consider the SAIL (air-released lock) or BSAI (clamp-lock) series instead. To match this ISO 15552 footprint, specify the 40 mm bore, 550 mm stroke, 100 mm adjustment, PT G1/4 ports, and the -S 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 SAIJ40BX550-100S FAQ
At a 0.7 MPa operating pressure, this 40 mm bore cylinder generates 879 N of push force and 528 N of pull force.
The rear adjuster acts as a mechanical stop that shortens the 550 mm nominal stroke by up to 100 mm, providing a usable travel window of 450-550 mm for fine-tuning the retract end position.
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