This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX325S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI80 Standard Air Cylinder SI80AX325S
The AirTAC SI80 Standard Air Cylinder SI80AX325S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 325mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX325S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX325S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI80 Standard Air Cylinder SI80AX325S
The AirTAC SI80AX325S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N push force at 0.5 MPa through its 80 mm bore and 325 mm stroke. It features a SUS420J2 stainless steel rod (-A) and a built-in magnet (-S) for legacy CS1-B/DS1-B sensors. AirTAC replaced this unit with the SAI80AX325S, a direct sharing the exact ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread.
The SAI80AX325S upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note that plain cylinders drift without live air; for load holding, explore the SAIL or BSAI lock variants the SI line lacked.
Airtac SI80 Standard Air Cylinder SI80AX325S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX325S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX325S |
| 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 standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80AX325S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAI80AX325S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80AX325S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×325 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI80 Standard Air Cylinder SI80AX325S Is Used
Long-Stroke Forming Press
Drives a 325 mm stroke forming die with 2513 N push at 0.5 MPa, relying on external guides to prevent rod-bending during the high-force press cycle.
Vertical Gate Actuator
Actuates a 325 mm vertical materials handling gate, requiring an external pilot check valve since the standard air cushion only decelerates and cannot hold the load.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX325S with the SAI80AX325S
To replace the SI80AX325S, order the SAI80AX325S, confirming the ISO 15552 mounting interface, 80 mm bore, 325 mm stroke, G3/8 port, and -S magnet for current AirTAC switches. The -A rod specifies SUS420J2 stainless steel, and a Viton H seal option extends temperature limits to 0-150 C. If sizing both ways, neighboring bores (63 mm or 100 mm) offer different force classes, but this 80 mm bore yields 2513 N push at 0.5 MPa and 513 kgf max at 1.0 MPa. Because the 325 mm stroke exceeds 300 mm, use external guides to prevent rod-bending and side-load damage. Finally, a plain cylinder does not hold load on air loss; the cushion only decelerates. For secure holding, specify an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX325S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80AX325S FAQ
Yes, the SI80AX325S is discontinued. The direct replacement is the SAI80AX325S. It shares the identical ISO 15552 mounting interface, 80 mm bore, 325 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly while upgrading the piston seal.
The 80 mm bore uses a G3/8 air port. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa. It operates at 30-800 mm/s with a 36 mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX325S
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