Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40 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 SAIJ80AX85-40
The AirTAC SAIJ80X85-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 85mm stroke that can be fine-tuned down by up to 40mm, creating a precise 45-85mm usable travel window. Delivering 2513N of push force at 0.5 MPa, it handles substantial loads while allowing exact end-position calibration during commissioning.
This variant features an SUS420J2 stainless steel rod for enhanced corrosion resistance and operates via PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40 |
|---|---|
| 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 SAIJ80AX85-40
| 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 SAIJ80AX85-40 Is Used
Machine Changeovers
Dial in the 45-85mm travel window during product size changes without physically replacing the actuator or adding external stopper blocks.
End-Position Calibration
Fine-tune the retract stroke end during commissioning to perfect tooling alignment, absorbing mechanical tolerances directly at the rear screw.
Variable Diverter Stops
Adjust the stroke on the fly for conveyor routing arms that must accommodate different package sizes on the same line.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-40 the Right Cylinder?
Select this 80mm bore actuator when an application demands high thrust (2513N at 0.5 MPa) alongside variable end-stops, avoiding the need to swap cylinders during product changeovers. If your setup requires less force, stepping down to a 63mm bore yields 1559N; conversely, a 100mm bore offers 3927N. The adjustable rear screw is strictly a travel stop, not a lock, meaning it cannot hold a load without live air pressure. For dead-load holding, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 replacement exactly, specify: 80mm bore, 85mm stroke, 40mm adjustment, PT port thread, SUS420J2 rod, and no magnet.
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 SAIJ80AX85-40 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from the nominal 85mm down to a minimum of 45mm. It sets the travel end but does not lock the load without continuous air pressure.
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