Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 325mm 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
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-20
The AirTAC SAIJ80X325-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down to 305-325 mm from its 325 mm nominal stroke. It delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa, utilizing a robust 25 mm piston rod with an M20x1.5 thread. The rod is constructed from SUS420J2 stainless steel, providing excellent resistance to corrosion for demanding environments.
This adjustable-stroke model allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. It features PT tapered port threads (G3/8) and variable air cushions at both ends to manage deceleration. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic sensors if a magnet is specified later.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 325 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 SAIJ80AX325-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×325 | 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 SAIJ80AX325-20 Is Used
Machine Setup & Changeover
Dial in the exact retract stop during product size changeovers without machining new spacer blocks or replacing the entire cylinder.
Variable End-Stop Positioning
Fine-tune the extended or retracted end position on a conveyor sorting gate to accommodate varying package dimensions on the fly.
Assembly Line Calibration
Adjust the stroke window during initial commissioning to perfect the pressing force or alignment of a sub-assembly fixture.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX325-20 the Right Cylinder?
Choose this 80 mm bore cylinder when your application requires substantial force (2513 N push at 0.5 MPa) but still needs the flexibility of a variable end-stop. If your setup demands less force, stepping down to a 63 mm bore yields 1559 N, while moving up to a 100 mm bore provides 3927 N. The rear adjuster acts purely as a travel stop to set the retract position, not a lock; it cannot hold the load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series instead.
Because this 325 mm stroke exceeds 300 mm, the extended unsupported rod length increases susceptibility to side loads; ensure you use an external guide to prevent premature wear. This SAIJ configuration uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR options. It is dimensionally interchangeable per ISO 15552, featuring a PT port thread and no built-in 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 SAIJ80AX325-20 FAQ
At an operating pressure of 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N. The standard speed range for this bore size is 30-800 mm/s.
The rear adjusting screw allows you to shorten the nominal 325 mm stroke by up to 20 mm, creating a usable travel window of 305 to 325 mm. This stopper fine-tunes the end position at commissioning but does not lock or hold the load without continuous air pressure.
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