Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-20S
The AirTAC SAIJ40X230-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the retract end position. It provides a usable travel window of 210 to 230 mm, letting you dial back the nominal stroke by up to 20 mm during commissioning. Built with a SUS304 stainless steel rod, it handles corrosive environments better than standard carbon steel. Delivering 879 N of push force at 0.7 MPa, it fits mid-range automation tasks perfectly.
This model includes a built-in magnet for position sensing, working seamlessly with AirTAC CMSE reed and DMSE solid-state sensors. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. It uses a PT G1/4 port and relies on variable air cushions at both ends to decelerate the load smoothly. The rear adjuster acts purely as a mechanical stop to set the travel limit, so it does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 230 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 SAIJ40BX230-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×230 | 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 SAIJ40BX230-20S Is Used
Changeover Tuning
Dial in the exact retract distance from 210 to 230 mm during product size changeovers without adding external mechanical stops.
Corrosive Forming
Leverage the SUS304 stainless steel rod for pressing or lifting tasks in washdown or chemically exposed manufacturing cells.
Sensor-Driven Stops
Pair the built-in magnet with DMSE solid-state sensors to confirm the adjusted end-of-stroke position for automated sequencing.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX230-20S the Right Cylinder?
Choose this 40 mm bore when your application requires the 628 N push force at 0.5 MPa, but you need leeway to trim the travel distance for product changeovers. If you need higher force, stepping up to the 50 mm bore yields 982 N at 0.5 MPa. The adjustable stroke is ideal for machine setups where external stops are impractical, allowing you to set precise end positions without swapping cylinders. For load-holding without live air, this cylinder is not suitable; consider the SAIL or BSAI series instead.
As a dimensionally interchangeable ISO 15552 cylinder, it matches standard SAI footprint dimensions and uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2. When replacing, verify the 230 mm stroke, 20 mm adjustment, PT G1/4 port, and the -S magnet option. With a 230 mm stroke, ensure adequate guidance for the rod to prevent excessive side-loading.
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 SAIJ40BX230-20S FAQ
At 0.5 MPa it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
A rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke by up to 20 mm. This creates a usable travel window of 210 to 230 mm for fine-tuning end positions without replacing the cylinder.
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