Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 290mm 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
- Stroke290 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-20S
The AirTAC SAIJ80X290-20-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, delivering 3518N of push force at 0.7 MPa. It features a carbon steel piston rod and a PT tapered port thread. The built-in rear stopper screw provides a usable travel window of 270 to 290 mm, letting you dial in the exact retract distance without adding external stops.
This unit includes a magnet (-S) for use with CMSE reed and DMSE electronic sensors, fitting directly into the dual-side sensor grooves on the extruded aluminum barrel. The rear adjuster acts purely as a travel stop for end-position tuning and does not hold the load without live air pressure. For load-holding needs, refer to the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 290 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 SAIJ80X290-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×290 | 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 SAIJ80X290-20S Is Used
Machine Changeovers
Quickly fine-tune the 270-290mm retract position during product size transitions on a packaging line without swapping the cylinder.
End-Stop Calibration
Dial in the exact end-of-stroke contact point during initial commissioning to perfect a pressing or holding operation.
Variable End Positioning
Set precise retract distances for automated assembly stations that require slight positional adjustments between runs.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X290-20S the Right Cylinder?
Choose this 80mm bore when an application requires 3518N of thrust at 0.7 MPa, stepping up from the 50mm bore which provides 1374N. The adjustable stroke is ideal for machine changeovers where the retract end-position needs fine-tuning on the fly, unlike a fixed-stroke SAI cylinder. When replacing an ISO 15552 unit, match the 80mm bore, 290mm stroke, 20mm adjustment, PT port, and -S magnet.
Because the 290mm stroke is substantial, the 25mm rod diameter handles higher side loads, but an external guide is still recommended for unsupported loads. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
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 SAIJ80X290-20S FAQ
At 0.7 MPa operating pressure, this 80mm bore cylinder provides 3518N of push force and 2268N of pull force. At the maximum 1.0 MPa, it delivers 513 kgf.
The rear adjuster screw lets you shorten the 290mm nominal stroke by up to 20mm, providing a usable travel window of 270 to 290mm. This stopper only sets the end position and does not lock the load without live air.
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