Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-75S 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 SAIJ80AX280-75S
The AirTAC SAIJ80X280-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 280 mm stroke with an integrated adjustment screw that allows you to trim the retract end-position back by up to 75 mm, creating a highly flexible 205-280 mm usable travel window. This bore size delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This specific configuration includes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and a PT tapered port thread. The extruded aluminum barrel features sensor grooves on both sides, and because this model includes a magnet (-S), it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-of-trroke detection. The adjustable stopper allows for rapid fine-tuning during product changeovers without the need to physically swap the cylinder or bolt on external stops.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-75S |
|---|---|
| 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 SAIJ80AX280-75S
| 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 SAIJ80AX280-75S Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 205 and 280 mm during machine commissioning to accommodate varying material lengths without changing the physical cylinder.
Product Size Changeover
Quickly adjust the stroke stopper on the rear of the cylinder when the production line switches to a new product format, minimizing downtime and mechanical rework.
Heavy-Duty Assembly Press
Leverage the 2513 N push force at 0.5 MPa for pressing and seating components, using the adjuster to fine-tune the final pressing depth accurately.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX280-75S the Right Cylinder?
Select this 80 mm bore when your application requires substantial thrust—stepping down to a 63 mm bore drops the 0.5 MPa push force to 1559 N, whereas this 80 mm unit provides 2513 N. An adjustable-stroke cylinder is chosen over a fixed-stroke SAI when a machine requires variable end-stops for handling different product sizes on the same line. Remember that the rear adjuster acts purely as a mechanical stop to set the travel end; it does not lock or hold the load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series instead.
Because this model features a 280 mm stroke, the M20x1.5 piston rod should not be relied upon to absorb high side loads; an external guide rail is recommended for heavy or off-center tooling to prevent premature seal wear. This SAIJ80X280-75-S is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. It operates at speeds of 30-800 mm/s.
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 SAIJ80AX280-75S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm from the nominal 280 mm. This creates a usable travel window of 205-280 mm, enabling fine-tuning of the end position at commissioning without swapping the cylinder.
At 0.5 MPa operating pressure, the SAIJ80X280-75-S generates 2513 N of push force and 2268 N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 513 kgf.
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