Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-20S 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 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 SAIJ80X280-20S
The AirTAC SAIJ80X280-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 260 to 280 mm, allowing you to dial back the nominal 280 mm stroke by up to 20 mm during commissioning. Delivering 2513 N of pull force at 0.5 MPa, it handles robust actuation tasks without requiring external stops.
This model features a carbon steel piston rod and a PT tapered port. The extruded aluminum barrel includes sensor grooves on both sides, and because this is the -S variant, it contains a magnet for CMSE reed and DMSE electronic sensors. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-20S |
|---|---|
| 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 | 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 SAIJ80X280-20S
| 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 SAIJ80X280-20S Is Used
Machine Changeover
Quickly adapt end-stop positions for different product sizes on a single line without physically replacing the actuator.
Commissioning Fine-Tune
Dial in the exact 260-280 mm travel window during setup to perfect positioning and avoid mechanical hard hits.
Variable Stops
Provide adjustable physical stops for diverter arms or pushers that must handle varying package dimensions.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X280-20S the Right Cylinder?
Select this 80 mm bore when your application requires high thrust (2513 N pull at 0.5 MPa) and precise end-position tuning. If your force requirements are lower, stepping down to a 63 mm bore yields 1402 N of pull force, while moving up to a 100 mm bore provides 3681 N. The adjustable stroke is ideal for product changeovers, enabling variable end-stops without swapping cylinders.
Because the 280 mm stroke is relatively long, ensure adequate support to prevent excessive side-loading on the 25 mm rod. Remember that the rear adjuster only decelerates the travel end; for true load-holding without live air, consider the SAIL or BSAI series. This unit is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ80X280-20S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of pull force and 3518 N of push force. The maximum thrust is 513 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the effective travel from the nominal 280 mm down to 260 mm. This creates a 260-280 mm usable window for fine-tuning the retract end position without adding external stops.
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