Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-20 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-20
The AirTAC SAIJ80X270-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 250 to 270 mm, allowing you to dial back the nominal 270 mm stroke by up to 20 mm during commissioning. Built with an extruded aluminum barrel and a carbon steel rod, it delivers 2513 N of push force at 0.5 MPa.
This model uses a PT tapered port thread and includes variable air cushions at both ends to manage deceleration. The rear adjusting screw acts purely as a mechanical stop to fine-tune the end position without needing external stops, but it does not lock the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-20 |
|---|---|
| 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-20
| 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 SAIJ80X270-20 Is Used
End-Position Tuning
Dial in the exact retract distance within the 250-270 mm window during machine setup without swapping out the entire actuator.
Product Changeover
Adapt to different package sizes on a packaging line by adjusting the rear stopper to meet new stroke requirements quickly.
Assembly Pressing
Apply up to 2513 N of push force at 0.5 MPa for pressing components, with the flexibility to shorten the stroke if needed.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X270-20 the Right Cylinder?
Choose this 80 mm bore when you need robust thrust, stepping up from a 63 mm bore that yields 1559 N push at 0.5 MPa. The adjustable 250-270 mm window is ideal for product changeovers where exact end-positioning varies slightly. Since the total stroke is 270 mm, ensure an external guide supports the load to prevent excessive side-loading on the 25 mm carbon steel rod.
To match this ISO 15552 cylinder for a replacement, verify the 80 mm bore, 270 mm nominal stroke, 20 mm adjustment range, PT port threads, and standard carbon steel rod. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. No magnet is installed, so CMSE or DMSE sensors cannot be used without specifying the -S option.
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 SAIJ80X270-20 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can reach a maximum push force of 4523 N at 0.9 MPa.
The rear mechanical stopper allows you to trim the effective travel back by up to 20 mm from the 270 mm nominal stroke, creating a 250 to 270 mm usable window. It functions as a travel stop and does not hold the load without continuous air pressure.
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