Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-50S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX270-50S 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 SAIJ80BX270-50S
The AirTAC SAIJ80X270-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel end position at commissioning. With a nominal 270 mm stroke and a 50 mm adjustment screw, it provides a usable travel window of 220-270 mm without needing external stops.
This configuration includes a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet operates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches. The adjustable rear stopper acts strictly as a travel end deceleration device, not a lock, meaning it cannot hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-50S |
|---|---|
| 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 SAIJ80BX270-50S
| 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 SAIJ80BX270-50S Is Used
Machine Changeover
Dial in the 220-270 mm stroke window during product size transitions to set new end positions without physically swapping cylinders or adding external stopper blocks.
Variable End Stops
Ideal for diverter arms where the exact stopping point needs occasional mechanical fine-tuning to accommodate varying package dimensions on a packaging line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-50S the Right Cylinder?
The adjustable 220-270 mm travel window is ideal for product changeovers or fine-tuning end positions on the fly, removing the need to swap out a fixed-stroke SAI cylinder. Because the total stroke is 270 mm, you should ensure adequate external guiding to prevent excessive side-loading on the rod.
For ISO 15552 dimensionally interchangeable replacements, match the 80 mm bore, 270 mm stroke, 50 mm adjustment range, PT port thread, and the -S magnet requirement. If your application requires true load-holding without continuous air pressure, the SAIJ rear adjuster will not suffice; you should step up to an SAIL air-released lock or a BSAI clamp-lock cylinder. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR styles.
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 SAIJ80BX270-50S FAQ
The rear external adjusting screw acts as a mechanical stopper that shortens the effective stroke by up to 50 mm. For this 270 mm nominal stroke model, it creates an adjustable travel window of 220-270 mm, allowing you to fine-tune the retract end position without changing the cylinder itself.
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