Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX270-20 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 SAIJ80BX270-20
The AirTAC SAIJ80X270-20 is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster.
This bore size utilizes a G3/8 port and a 25mm piston rod, while this specific configuration features a SUS304 stainless steel rod (code B) for superior corrosion resistance. The extruded aluminum barrel incorporates sensor grooves on both sides, allowing for the direct mounting of AirTAC CMSE reed or DMSE electronic sensors if a magnet is specified later.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-20 |
|---|---|
| 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 SAIJ80BX270-20
| 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 SAIJ80BX270-20 Is Used
Product Changeover
Quickly adjust the 250-270mm travel end-stop to accommodate varying package sizes on a packaging line without changing cylinder hardware.
Machine Setup
Fine-tune the final retract position during initial commissioning to achieve precise alignment, avoiding the cost of custom-machined external spacers.
Variable End Stops
Dial in the exact stopping point for diverter gates or positioning stops where minor stroke variations are needed between production runs.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-20 the Right Cylinder?
Choose this 80mm bore when an application requires more thrust than a 63mm cylinder can provide (1559N at 0.5 MPa), but without stepping up to the heavier 100mm class. The integrated rear stopper allows you to dial in the exact 250-270mm end position during commissioning or product changeovers, eliminating the need to swap out the entire cylinder or bolt on external mechanical stops.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders. To match this exact unit, specify a PT tapered port thread, SUS304 rod material, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), which omits FB, CA, CB, and CR brackets. Because the 270mm stroke is relatively long, ensure adequate external guiding to prevent excessive side-loading on the rod. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for positive load-holding, consider an external rod lock or the AirTAC SAIL/BSAI series.
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 SAIJ80BX270-20 FAQ
At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw allows you to shorten the effective stroke by up to 20mm. This creates a 250-270mm adjustable travel window, letting you set the exact retract end position at commissioning without replacing the cylinder.
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