Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-40
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX270-40 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 SAIJ80BX270-40
The AirTAC SAIJ80X270-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 230 to 270 mm without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE or DMSE switches if a magnet is specified later.
Because the rear adjuster acts purely as a mechanical stop and the end cushions handle deceleration, this cylinder cannot hold a load without live air pressure. For fail-safe load holding, you would need an external rod lock or a different series like the SAIL. The standard SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-40 |
|---|---|
| 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 SAIJ80BX270-40
| 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 SAIJ80BX270-40 Is Used
Machine Changeovers
Dial in the 230-270 mm travel window during product size transitions on a packaging line without physically swapping cylinders.
End-Position Tuning
Fine-tune the retract stop during commissioning to achieve precise end-of-stroke positioning without adding external mechanical stops.
Variable End Stops
Adjust the rear screw to alter the stroke length on the fly for handling different carton sizes on a conveyor sorting system.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX270-40 the Right Cylinder?
An adjustable stroke is ideal for machine setups requiring precise end-position tuning during commissioning or product changeovers, saving the cost of swapping a fixed-stroke SAI cylinder. With a 270 mm stroke, the 25 mm rod handles side loads well, but you should still use an external guide for heavy radial forces. For an exact ISO 15552 replacement, match the 80 mm bore, 270 mm stroke, 40 mm adjustment, PT ports, SUS304 rod, and your required mounting interface.
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 SAIJ80BX270-40 FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to trim the effective stroke back by up to 40 mm, creating a usable travel window of 230 to 270 mm.
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Covers non-human-caused product damage.
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