This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX325, 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 SI80AX325
The AirTAC SI80 Standard Air Cylinder SI80AX325 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 SAI80AX325, 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 → SAI80AX325
- 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 SI80AX325
The AirTAC SI80AX325 is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel, delivering 2513 N push and 2268 N pull at 0.5 MPa. It features a 325 mm stroke, a G3/8 port, and a SUS420J2 stainless steel piston rod. AirTAC replaced this legacy unit with the SAI80AX325, a direct replacement sharing the exact ISO 15552 mounting interface, bore, and force ratings.
The SAI80AX325 upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note this SKU lacks a magnet and cannot accept a sensor. For load-holding, the cushion only decelerates; explore the SAIL lock or BSAI clamp-lock variants the SI line lacked.
Airtac SI80 Standard Air Cylinder SI80AX325 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX325 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX325 |
| 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 SAI80AX325 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 SAI80AX325 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 SI80AX325
| 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 SI80AX325 Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for corrosion resistance in washdown or mildly chemical manufacturing environments requiring 2513 N push force.
325 mm Transfer Push
Uses the extended 325 mm stroke to index heavy pallets along a conveyor, benefiting from external guides to prevent rod-bending side loads.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX325 with the SAI80AX325
To replace the SI80AX325, order the SAI80AX325 keeping the identical 80 mm bore, 325 mm stroke, G3/8 port, and ISO 15552 mounting fixtures. This SKU has no -S magnet, so it cannot support legacy CS1-B/DS1-B sensors; choose an SAI with S if sensing is needed. The SUS420J2 rod offers corrosion resistance over standard carbon steel. If sizing alternatives, neighboring bores (63 mm or 100 mm) change the 0.5 MPa push force (1559 N or 3927 N). Because 325 mm exceeds 300 mm, use an external guide to prevent rod-bending side loads. A plain cylinder drifts without air; for held loads use an external rod lock, pilot check valve, or the SAIL/BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX325
- ✓ 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 SI80AX325 FAQ
Yes, the SI80AX325 is discontinued. The direct replacement is the SAI80AX325. It shares the identical ISO 15552 mounting interface, 80 mm bore, 325 mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
The G3/8 port bore delivers 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 SAI80AX325
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