Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 280mm 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
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20S
The AirTAC SAIJ80X280-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end-of-travel position during commissioning. Based on the 280 mm nominal stroke and the 20 mm adjustment code, this model provides a usable travel window of 260-280 mm. Delivering a robust 4523 N of push force at 0.9 MPa, it handles heavy actuation tasks without needing external stops.
This SKU features a SUS420J2 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel integrates sensor grooves on both sides, and the PT tapered G3/8 port ensures a reliable pneumatic connection.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 280 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 SAIJ80AX280-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×280 | 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 SAIJ80AX280-20S Is Used
Product Changeover
Dial in the exact 260-280 mm end position during line changeovers without physically replacing the actuator or adding external mechanical stops.
Commissioning Fine-Tuning
Use the rear adjustment screw to trim the final 20 mm of travel, compensating for minor mechanical clearances or sensor offsets at setup.
Heavy Assembly Presses
Leverage the 4523 N push force at 0.9 MPa to seat components securely, relying on the built-in air cushion to decelerate the load smoothly.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-20S the Right Cylinder?
Choose this 80 mm bore when the 50 mm class (1374 N push at 0.5 MPa) is insufficient but the 100 mm class is oversized. The adjustable rear stopper is ideal for product changeovers, letting you dial in the exact 260-280 mm travel without swapping the cylinder. Because the stroke is 280 mm, external guiding is recommended to manage side loads and prevent rod bending over longer travels.
For dimensionally interchangeable ISO 15552 replacements, match the 80 mm bore, 280 mm stroke, 20 mm adjustment, PT G3/8 port, and the -S magnet. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for fail-safe load holding, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder.
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 SAIJ80AX280-20S FAQ
The rear adjuster screw lets you shorten the nominal 280 mm stroke by up to 20 mm, providing a usable travel window of 260-280 mm. It acts purely as a mechanical stop to set the end position and does not lock or hold the load without continuous air pressure.
At an operating pressure of 0.9 MPa, this double-acting cylinder generates a push force of 4523 N and a pull force of 2268 N. The maximum thrust is 513 kgf at 1.0 MPa.
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