Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 425mm 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
- Stroke425 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-40
The AirTAC SAIJ80X425-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 425 mm nominal stroke that can be fine-tuned backward by up to 40 mm, yielding a usable travel window of 385-425 mm for precise end-position calibration. Delivering 2513 N of push force at 0.5 MPa, it is built with a SUS420J2 stainless steel rod and a G3/8 port.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops during machine changeovers. The rear screw acts purely as a travel stop to set the retraction end, not as a lock, meaning live air is required to hold the load. It supports variable air cushions at both ends and operates at speeds of 30-800 mm/s.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 425 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 SAIJ80AX425-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×425 | 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 SAIJ80AX425-40 Is Used
Machine Changeover
Dial in the 385-425 mm retraction end-stop during product size changes without physically swapping the actuator.
End-Position Tuning
Fine-tune the final resting position at commissioning to perfect tooling alignment using the rear adjustment screw.
Variable Diverter Stops
Adjust the stroke length on the fly for conveyor lines handling packages of varying depths.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-40 the Right Cylinder?
Select this 80 mm bore when an application requires around 2513 N of push force at 0.5 MPa, or step down to the 63 mm bore (1559 N) if your load is lighter. The adjustable 385-425 mm window is ideal for setups requiring variable end-stops without buying multiple fixed-stroke SAI cylinders. Because the 425 mm stroke is relatively long, an external guide is recommended to handle side loads and prevent rod bending.
For a direct ISO 15552 replacement match, verify the 80 mm bore, 425 mm stroke, 40 mm adjustment, PT tapered port threads, and the SUS420J2 rod material. It uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. If position holding without live air pressure is required, look to the SAIL or BSAI series instead of relying on the adjuster.
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 SAIJ80AX425-40 FAQ
The rear adjuster screw allows you to trim the effective stroke by up to 40 mm. This creates a usable travel window of 385-425 mm, letting you set the exact end position without adding external stops.
At a 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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