Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 50mm 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
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20S
The AirTAC SAIJ80X50-20-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, delivering 2513N push force at 0.5MPa. Its 50mm nominal stroke can be dialed back by up to 20mm, providing a precise 30-50mm usable travel window for fine-tuning end positions without adding external stops.
This variant features a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. It uses a PT tapered G3/8 port and offers adjustable air cushions at both ends to manage impact energy.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAIJ80AX50-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SAIJ80AX50-20S Is Used
Product Changeovers
Dial in the 30-50mm travel window on the fly when switching packaging lines to different carton heights, avoiding physical cylinder swaps.
End-Stop Calibration
Fine-tune the retract position during machine commissioning to perfect a pressing operation without machining external stopper blocks.
Short-Stroke Forming
Leverage the 2513N thrust at 0.5MPa for compact forming or clamping tasks where exact bottoming depth is critical to part quality.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX50-20S the Right Cylinder?
Choose this 80mm bore when a 50mm stroke application requires exact end-position tuning during commissioning or product-size changeovers, stepping up from a 63mm bore that yields 1559N push force at 0.5MPa. The rear adjuster acts purely as a mechanical travel stop to set the retract position; it does not hold the load without live air pressure, so for true fail-safe load holding you should select a SAIL or BSAI model instead.
To match this ISO 15552 replacement cylinder exactly, confirm the 80mm bore, 50mm stroke, 20mm adjustment range, PT G3/8 port, and the integrated magnet. It supports the reduced SAIJ mounting set of 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 SAIJ80AX50-20S FAQ
At 0.5MPa it provides 2513N of push force and 2268N of pull force. At 0.7MPa the push force increases to 3518N. The operational speed range for this 80mm bore is 30-800mm/s.
The rear adjusting screw lets you shorten the effective stroke by up to 20mm, creating a 30-50mm usable travel window. This allows you to set the exact retract end-position during commissioning without replacing the cylinder.
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