Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20S
The AirTAC 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke70 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
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. Delivering 2513 N of push force at 0.5 MPa, it provides robust actuation within a compact 70 mm nominal stroke. 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 | 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 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.
Short-Stroke Clamping
Leverage the 2513 N push force at 0.5 MPa for short-stroke clamping tasks where the exact grip distance varies slightly per part.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX70-20S the Right Cylinder?
Select this 80 mm bore cylinder when your application requires 2513 N of push force at 0.5 MPa and a highly specific end-position within a 50 to 70 mm travel window. 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
At 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. It can deliver up to 4523 N of push force at its maximum rated pressure of 0.9 MPa.
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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