Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50S 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 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 SAIJ80X280-50S
The AirTAC SAIJ80X280-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 230 to 280 mm. It delivers a robust 2513 N push force at 0.5 MPa, making it well-suited for heavy industrial positioning tasks.
This model features a carbon steel piston rod with an M20x1.5 thread, paired with PT tapered ports for secure pneumatic connections. The integrated -S magnet allows seamless use with AirTAC CMSE reed and DMSE electronic sensors, while the extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50S |
|---|---|
| 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 | 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 SAIJ80X280-50S
| 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 SAIJ80X280-50S Is Used
Machine Changeover
Dial in the exact retract position within the 230-280 mm window during product size transitions on a packaging line without changing hardware.
End-Stop Tuning
Fine-tune the final end-of-stroke position during initial commissioning to perfect a pressing or clamping operation.
Variable Positioning
Adjust the travel distance on the fly for heavy-duty material handling equipment that processes varying package dimensions.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-50S the Right Cylinder?
Select this 80 mm bore cylinder when an application requires fine-tuning the retract end-position during commissioning or product changeovers without swapping out the physical cylinder. If your process requires less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa. For higher output, a 100 mm bore provides 3927 N.
Because the 280 mm stroke exceeds 300 mm is not the case here, but long unsupported strokes still benefit from an external guide to prevent rod side-loading. The rear adjuster acts solely as a travel stop and cannot hold a load without live air pressure; for true load-holding, consider the SAIL or BSAI series. This unit is dimensionally interchangeable per ISO 15552, utilizing a mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ80X280-50S FAQ
At 0.5 MPa, this 80 mm bore cylinder provides a push force of 2513 N and a pull force of 2268 N. The maximum force at 1.0 MPa is 513 kgf.
The rear adjuster screw acts as a mechanical stop that can shorten the nominal 280 mm stroke by up to 50 mm, giving an effective travel range of 230 to 280 mm. It functions as a travel stop only and does not lock the load without live air pressure.
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