Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-40S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX270-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 270mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 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 SAIJ80 Adjustable Cylinder SAIJ80BX270-40S
The AirTAC SAIJ80X270-40-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 230 to 270 mm. The PT-threaded G3/8 ports and integrated variable air cushions at both ends manage deceleration across its 30-800 mm/s operating speed range.
This adjustable-stroke model allows precise end-position tuning during commissioning without swapping the cylinder or adding external stops. It features an integrated -S magnet for position sensing via AirTAC CMSE reed or DMSE electronic solid-state switches fitted into the dual-side sensor grooves on the extruded aluminum barrel. The rear adjuster acts purely as a travel stop for deceleration setup and does not lock the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 270 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 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 SAIJ80 Adjustable Cylinder SAIJ80BX270-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×270 | 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 SAIJ80 Adjustable Cylinder SAIJ80BX270-40S Is Used
Product Changeovers
Quickly dial the stroke back by up to 40 mm via the rear screw when adapting the line to different product lengths without changing the cylinder.
End-Position Tuning
Fine-tune the exact retract position during machine commissioning to achieve perfect alignment without adding external mechanical stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-40S the Right Cylinder?
The 40 mm adjustment range is ideal for product-size changeovers on a line, letting operators dial in the exact end-stop mechanically. For load-holding without continuous live air pressure, this cylinder is insufficient; the rear stopper is not a brake, so you should utilize an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 270 mm nominal stroke, 40 mm adjustment code, G3/8 PT ports, and the -S magnet requirement. Because the 270 mm stroke is substantial, the 25 mm rod handles significant side loads, but any long unsupported stroke still necessitates an external guide to prevent binding. Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80 Adjustable Cylinder SAIJ80BX270-40S FAQ
At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from the 270 mm nominal length down to 230 mm. It sets the travel end and deceleration point, but it does not lock the load without live air pressure.
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