Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-20
The AirTAC SAIJ80X85-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel window down to 65-85 mm. Delivering 2513 N of push force at 0.5 MPa, it handles robust positioning tasks while allowing precise end-stop tuning during commissioning. The extruded aluminum barrel includes sensor grooves on both sides, though this specific configuration ships without a magnet.
This variant utilizes an SUS420J2 stainless steel piston rod for superior corrosion resistance and features PT tapered port threads. The rear adjustment screw acts purely as a mechanical stop to dial in the exact retract position without adding external spacers. It supports a speed range of 30-800 mm/s and uses adjustable air cushions at both ends to manage deceleration across the short travel distance.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 85 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 SAIJ80AX85-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×85 | 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 SAIJ80AX85-20 Is Used
End-Position Tuning
Dial in the exact retract distance within the 65-85 mm window during machine commissioning without swapping out the entire cylinder.
Product Changeover
Quickly adapt the retract stop for new part sizes on a multi-product line, using the rear adjuster instead of adding external spacers.
Short-Stroke Clamping
Apply up to 2513 N of clamping force at 0.5 MPa while relying on the mechanical stop to guarantee a precise, repeatable clamp position.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-20 the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore yields insufficient pull force (825 N at 0.5 MPa) or a 63 mm bore lacks the required 1402 N pull. The SAIJ80X85-20 is selected specifically when you need to fine-tune the end-of-stroke position on the fly during machine setup or product changeover, rather than committing to a fixed 85 mm SAI cylinder. The rear adjuster and air cushions only manage travel ends and deceleration; they do not hold the load without live air. For fail-safe load holding, consider an external rod lock or the SAIL series.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 85 mm stroke, 20 mm adjustment range, PT G3/8 port, and standard mounting interface. Available mountings include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is under 300 mm, side-load risks are minimal, but the 25 mm rod diameter still provides excellent rigidity for offset loads.
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 SAIJ80AX85-20 FAQ
The rear adjusting screw acts as a mechanical stop that shortens the effective stroke by up to 20 mm. This creates a usable travel window of 65-85 mm, allowing you to fine-tune the end position without changing the cylinder or adding external stops.
At 0.5 MPa operating pressure, it provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
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