Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80AX70-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 70mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20S
The AirTAC SAIJ80X70-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits a usable travel window of 50 to 70 mm. The extruded aluminum barrel includes sensor grooves on both sides, and this variant is equipped with a piston magnet for position feedback.
This configuration uses a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance and features PT tapered port threads. The rear adjustment screw acts as a mechanical stop to fine-tune the retract end position during commissioning without adding external stops. It is not a locking device and requires live air to maintain position.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 70 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×70 | 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 SAIJ80AX70-20S Is Used
Changeover Tuning
Dial in the exact retract distance between 50 and 70 mm during product size changeovers without replacing the actuator.
End-Stop Calibration
Use the rear mechanical stop to precisely set the final end position during machine commissioning, avoiding external shims.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20S the Right Cylinder?
The adjustable stroke is ideal for machine setups requiring frequent product changeovers, eliminating the need to physically swap out a fixed-stroke SAI cylinder. The 25 mm SUS420J2 stainless rod and M20x1.5 thread provide excellent side-load resistance, though an external guide should still support any radial loads.
For load-holding without continuous air pressure, this cylinder is insufficient; consider the SAIL or BSAI series instead. When replacing an ISO 15552 cylinder, match the 80 mm bore, 70 mm stroke, 20 mm adjustment, PT G3/8 port, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB and CA/CB/CR mounts.
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 SAIJ80AX70-20S FAQ
The rear adjuster screw lets you mechanically shorten the 70 mm nominal stroke by up to 20 mm, creating a 50 to 70 mm usable travel window. This allows precise end-position tuning during setup without needing to swap the cylinder or add external stops.
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Standard models are processed and dispatched in 3-5 business days.
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