Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-100S
The AirTAC SAIJ40X240-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 240 mm nominal stroke that can be dialed back by up to 100 mm, yielding a highly flexible 140-240 mm usable travel window. Delivering 628 N of push force at 0.5 MPa, it fits seamlessly into dimensionally interchangeable ISO 15552 mounting footprints.
This specific SKU features a SUS304 stainless steel rod for superior corrosion resistance, PT tapered ports, and an integrated magnet for position sensing. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount CMSE reed or DMSE electronic solid-state switches anywhere along the travel path.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 240 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 SAIJ40BX240-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×240 | 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 SAIJ40BX240-100S Is Used
Product Changeover
Dial in the exact end-position during format size changes on a packaging line, utilizing the 140-240 mm travel window without adding external mechanical stops.
Machine Setup
Fine-tune the retract end-position at commissioning to perfect sensor trigger points using the rear screw, avoiding complete cylinder replacements.
Variable End Stops
Achieve precise lower-end positioning for assembly tooling, relying on the 100 mm adjustment range to adapt the stroke to varying part dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-100S the Right Cylinder?
Choose this 40 mm bore when you need 628 N push force at 0.5 MPa; step down to a 32 mm bore (402 N) for lighter duties, or up to a 50 mm bore (982 N) if your load demands more thrust. The generous 100 mm rear adjuster is perfect for machine setups requiring variable end-stops or product-size changeovers without swapping the physical cylinder. Mounting options include the reduced SAIJ set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 240 mm stroke exceeds 300 mm? No, but for any long stroke, ensure external guides support the load to prevent side-loading. The rear adjuster acts strictly as a travel stop and does not hold the load without live air; for true load-holding, select a SAIL or BSAI cylinder.
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 SAIJ40BX240-100S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster acts as a mechanical stop that shortens the retract stroke by up to 100 mm, creating a usable travel window of 140 to 240 mm. It only sets the travel end and does not lock the load without live air pressure.
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