This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX450S, 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 SI80AX450S
The AirTAC SI80 Standard Air Cylinder SI80AX450S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80AX450S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80AX450S
- 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 SI80AX450S
The AirTAC SI80AX450S is a discontinued double-acting ISO 15552 profile cylinder featuring an SUS420J2 stainless steel rod and a 450mm stroke. Delivering 2513N push force at 0.5MPa through a G3/8 port, it is replaced by the direct replacement SAI80AX450S. This successor shares the exact interface, bore, and force, fitting existing fixtures perfectly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. The -S magnet works with legacy CS1-B/DS1-B sensors, while a Viton H seal option raises heat resistance to 150C.
Airtac SI80 Standard Air Cylinder SI80AX450S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX450S |
| Bore size | Ø80 mm |
| Stroke | 450 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 SAI80AX450S 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 SAI80AX450S 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 SI80AX450S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×450 | 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 SI80AX450S Is Used
Heavy Material Diversion
Handles robust routing of heavy pallets or workpieces on assembly lines, utilizing the 2513N push force at 0.5MPa to reliably actuate large diverter arms over the 450mm travel.
Stainless Press Operation
The SUS420J2 stainless rod excels in humid washdown environments, providing the 128kg vertical lift capacity needed for lowering heavy forming dies or applying consistent clamping pressure.
Automated Pallet Handling
Drives large format load stops and lifting gates in high-throughput logistics hubs, where the 80mm bore and adjustable 36mm air cushions absorb kinetic energy at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX450S with the SAI80AX450S
To replace the SI80AX450S, order the SAI80AX450S, confirming the ISO 15552 mounting interface, 80mm bore, 450mm stroke, G3/8 port, and mounting accessory. The -A rod is SUS420J2 stainless and the -S magnet requires CS1-B/DS1-B switches. Sizing both ways: a 63mm bore yields 1559N push at 0.5MPa, while a 100mm bore yields 3927N. Note that a 450mm stroke needs external guides to prevent rod bending under side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX450S
- ✓ 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 SI80AX450S FAQ
Yes, the SI80AX450S is discontinued. The direct replacement is the SAI80AX450S. It is dimensionally interchangeable per ISO 15552, retaining the same 80mm bore, 450mm stroke, G3/8 port, and mounting interface, so it drops directly into existing fixtures.
It features a G3/8 air port and provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and a theoretical maximum force of 513kgf at 1.0MPa. The cylinder operates at 30-800mm/s with a 25mm rod and M20x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX450S replacement — usually within 7-8 hours.