Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-75S
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40BX280-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 280mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-75S
The AirTAC SAIJ40X280-75-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 280 mm stroke that can be fine-tuned backward by up to 75 mm, creating a usable travel window between 205 and 280 mm.
This variant includes a magnet for position sensing via CMSE reed or DMSE electronic switches. The extruded aluminum barrel integrates sensor grooves on both sides, and the mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR interfaces.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 280 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×280 | 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 SAIJ40BX280-75S Is Used
Changeover Calibration
Dial in the 205-280 mm travel window during product size changeovers on a packaging line without adding external mechanical stops.
End-Position Trimming
Fine-tune the retract end-position at commissioning to achieve precise seating of 40 mm bore components without cylinder removal.
Sensor Targeting
Utilize the integrated -S magnet with DMSE electronic sensors to confirm the adjusted end-stop position across the variable travel range.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX280-75S the Right Cylinder?
The 75 mm rear adjustment screw is selected over a fixed-stroke SAI when a machine requires variable end-stops for rapid product changeovers without swapping the physical cylinder.
Because the 280 mm stroke exceeds 300 mm only marginally, it sits close to the side-load threshold; ensure external guiding if heavy lateral loads are present. Note that the rear adjuster acts strictly as a travel stop and does not hold the load without live air. For true fail-safe load holding, select the SAIL or BSAI series instead. To match this ISO 15552 footprint exactly, specify: 40 mm bore, 280 mm stroke, 75 mm adjust, PT G1/4 port, and -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 SAIJ40BX280-75S FAQ
At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective travel from the 280 mm nominal stroke by up to 75 mm, providing a usable stroke range of 205-280 mm. It acts as a mechanical stop and does not lock the load without air pressure.
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