Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX280-20 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke280 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 SAIJ80BX280-20
The AirTAC SAIJ80X280-20 is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 2513N pull force at 0.5 MPa and uses a PT G3/8 port. The built-in adjusting stopper allows you to trim the effective travel back by up to 20 mm, creating a precise 260-280 mm usable stroke window for fine-tuning end positions during commissioning.
This 80 mm bore unit incorporates a SUS304 stainless steel rod for superior corrosion resistance and carries a 36 mm cushion length at both ends. It supports speeds of 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, while the rear stopper acts purely as a travel limit and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-20 |
|---|---|
| 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 | 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 SAIJ80BX280-20
| 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 SAIJ80BX280-20 Is Used
Machine Changeover
Dial in the 260-280 mm travel window during product size transitions on a packaging line without adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stroke at commissioning to absorb mechanical tolerances and achieve precise clamping or pressing distances.
Adjustable Assembly Stops
Set variable end-stops on an assembly conveyor to handle multiple part configurations using a single 80 mm bore actuator.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-20 the Right Cylinder?
Choose this adjustable model over a fixed SAI when your machine setup requires variable end-stops or product-size changeovers without swapping the entire cylinder. If you need less force, stepping down to a 63 mm bore yields a 1402N pull at 0.5 MPa. For higher load-holding requirements without live air, note that this adjuster is only a stop; you should consider an external rod lock, a pilot-operated check valve, or the related SAIL or BSAI clamp-lock cylinders.
To match this exact configuration for an ISO 15552 replacement, specify an 80 mm bore, 280 mm stroke, 20 mm adjustment range, PT tapered port thread, and SUS304 (B) rod material. Because the 280 mm stroke is relatively long, the 25 mm rod diameter and M20x1.5 thread can handle moderate side loads, but an external guide is still recommended to prevent rod binding.
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 SAIJ80BX280-20 FAQ
At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw lets you shorten the 280 mm nominal stroke by up to 20 mm, providing a usable travel window of 260-280 mm. This allows precise end-position tuning at commissioning without replacing the cylinder.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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