Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-50S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX280-50S 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 SAIJ80BX280-50S
The AirTAC SAIJ80X280-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 280 mm travel back by up to 50 mm, yielding a usable 230-280 mm window. The extruded aluminum barrel includes sensor grooves on both sides, and the -S option equips the piston with a magnet for position detection via AirTAC CMSE reed or DMSE electronic sensors.
This unit is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance and features a PT tapered port thread. Because the stroke is 280 mm, the 25 mm rod diameter and M20x1.5 rod thread provide rigidity, though long unsupported travels still call for an external guide to manage side loads. The rear adjuster acts purely as a travel stop for end-position tuning, so the cylinder will not hold a load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-50S |
|---|---|
| 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 SAIJ80BX280-50S
| 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 SAIJ80BX280-50S Is Used
Product Changeover
Dial the rear stopper back by up to 50 mm to quickly accommodate different package lengths on a packaging line without changing the cylinder.
End-Position Tuning
Fine-tune the 230-280 mm travel window during machine commissioning to achieve precise mechanical alignment without adding external spacers.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-50S the Right Cylinder?
If your setup needs less force, the 63 mm neighbor offers 1559 N at 0.5 MPa; if you need more, the 100 mm bore provides 3927 N. The adjustable stroke is ideal for product-size changeovers on a line, replacing the need to bolt on external stops. For applications requiring true load-holding without live air, consider the SAIL or BSAI locking variants instead, as the SAIJ adjuster is not a brake.
To replace an ISO 15552 cylinder, match the 80 mm bore, 280 mm stroke, 50 mm adjustment range, PT G3/8 port, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Given the 280 mm stroke, always verify external guiding to prevent excessive side-loading on the rod.
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 SAIJ80BX280-50S FAQ
If operated at 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw allows you to shorten the effective travel from the 280 mm nominal stroke down to 230 mm. This creates a 50 mm adjustable window for fine-tuning the end position at commissioning, but it acts only as a stop and does not lock the load.
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