Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 125mm 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
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20S
The AirTAC SAIJ80X125-20-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, equipped with a magnet for CMSE reed and DMSE electronic sensors. It delivers 2513N push and 2268N pull thrust at 0.5 MPa. The built-in rear stopper allows you to fine-tune the end position, creating a usable travel window of 105-125 mm without adding external stops.
This extruded aluminum barrel features sensor grooves on both sides and operates at 30-800 mm/s. It uses a G3/8 port and a 25mm carbon steel rod with an M20x1.5 thread, which handles high side loads well. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 125 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 SAIJ80X125-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×125 | 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 SAIJ80X125-20S Is Used
Machine Changeover
Dial in the 105-125mm stroke window during product size transitions to set new end positions rapidly without mechanical rebuilds.
Variable End Stops
Fine-tune the retract position on the fly during commissioning to perfect positioning accuracy for varying assembly heights.
Assembly Line Forming
Leverage 2513N of push force at 0.5 MPa for pressing operations while using the rear screw to compensate for tooling wear.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X125-20S the Right Cylinder?
Choose this 80mm bore when you need 2513N of push force at 0.5 MPa, or step down to a 63mm bore for 1559N if your payload is lighter. The 20mm rear adjustment screw is ideal for product changeovers, letting you dial in the exact end-stop on the line without swapping the cylinder. Since the stroke is under 300mm, the 25mm rod handles the load cleanly, though long unsupported travel still requires an external guide.
This adjustable stopper only decelerates the travel end; it does not hold the load without live air. For dead-stop holding without pressure, use an external rod lock or pilot-operated check valve, or select the SAIL or BSAI cylinder series. This model is dimensionally interchangeable per ISO 15552, uses PT tapered port threads, and includes the -S magnet for position sensing.
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 SAIJ80X125-20S FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from 125 mm down to 105 mm. This provides a 20 mm tuning window for precise end-position setup without changing the cylinder.
At 0.5 MPa operating pressure, it provides 2513N of push force and 2268N of pull force. It can deliver up to 4523N push at 0.9 MPa.
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