Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-20S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX280-20S 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 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 SAIJ80BX280-20S
The AirTAC SAIJ80X280-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end-of-travel position. With a nominal 280 mm stroke and a 20 mm adjustment screw, it provides a usable travel window of 260-280 mm to accommodate product size changeovers without adding external stops.
This variant includes a magnet for CMSE reed and DMSE electronic sensors, which mount cleanly into the extruded aluminum barrel's dual sensor grooves. It features a SUS304 stainless steel rod for corrosion resistance and uses PT tapered ports. The adjustable stopper acts purely as a travel limit and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-20S |
|---|---|
| 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 | 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 SAIJ80BX280-20S
| 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 SAIJ80BX280-20S Is Used
Variable End Stops
Dial in the exact 260-280 mm retraction point during machine commissioning to accommodate varying material lengths without external stopper blocks.
Product Changeovers
Quickly adjust the stroke by up to 20 mm on automated lines when switching to a different product size, minimizing downtime between production runs.
Sensor-Ready Automation
Leverage the integrated magnet and dual barrel grooves to mount CMSE reed or DMSE solid-state sensors for precise end-position feedback in assembly cells.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-20S the Right Cylinder?
Choose this 80 mm bore when 50 mm falls short (delivering only 825 N pull at 0.5 MPa) but 100 mm is excessive. The adjustable stroke is ideal for commissioning setups where the exact end position must be dialed in on the fly, unlike a fixed-stroke SAI cylinder. Because the stroke is 280 mm, an external guide is recommended to prevent excessive side-loading on the 25 mm rod and M20x1.5 thread. To match this ISO 15552 replacement, verify the 280 mm stroke, 20 mm adjustment, PT G3/8 port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and the -S magnet.
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 SAIJ80BX280-20S FAQ
At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw lets you shorten the 280 mm nominal stroke by up to 20 mm, creating a 260-280 mm travel window. It functions as a mechanical stop and does not lock the load without air pressure.
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Covers non-human-caused product damage.
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