Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50 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 SAIJ80AX280-50
The AirTAC SAIJ80X280-50 is a double-acting, single-rod profile cylinder dimensionally interchangeable per ISO 15552. It integrates a rear stopper screw that allows you to fine-tune the retract end position, creating a usable travel window between 230 and 280 mm without adding external stops. In the 80 mm bore class, it provides 2513 N of push force and 2268 N of pull force at 0.5 MPa, peaking at 4523 N when supplied at 0.9 MPa.
This unit features a SUS420J2 stainless steel piston rod for enhanced corrosion resistance over standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, while the PT tapered port threads ensure a tight, reliable pneumatic connection. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50 |
|---|---|
| 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 SAIJ80AX280-50
| 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 SAIJ80AX280-50 Is Used
Machine Changeover
Dial in the 230-280 mm travel window during product size transitions to set new retract positions without physically swapping cylinders.
Variable End Stops
Adjust the rear stopper screw to fine-tune where a diverter or pusher meets the belt, accommodating varying package lengths on the fly.
Fixture Alignment
Precisely set the end-of-stroke position during initial machine commissioning to align heavy clamping fixtures perfectly against the workpiece.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-50 the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore (982 N push at 0.5 MPa) lacks the thrust for heavier fixtures, but a 100 mm bore (3927 N push at 0.5 MPa) would be oversized. The 50 mm adjustment range is ideal for product-size changeovers on a packaging line, letting you dial in the exact end position during commissioning rather than machining custom spacers or swapping to a fixed-stroke SAI cylinder.
For a drop-in ISO 15552 replacement, match the 80 mm bore, 280 mm stroke, PT port threads, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interfaces. Because the stroke is 280 mm, the M20x1.5 piston rod should be guided externally on long reaches to prevent side-loading damage. If your application requires the load to stay put during a complete air pressure loss, note that the adjuster is not a lock—consider the SAIL or BSAI series instead.
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 SAIJ80AX280-50 FAQ
At a 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. If you increase the supply to 0.9 MPa, the push force reaches 4523 N.
The rear stopper screw lets you mechanically shorten the 280 mm nominal stroke by up to 50 mm, providing a usable travel window of 230 to 280 mm. This allows precise end-position tuning at commissioning without swapping the cylinder.
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