This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80AX450, 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 SI80AX450
The AirTAC SI80 Standard Air Cylinder SI80AX450 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 SAI80AX450, 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 → SAI80AX450
- 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 SI80AX450
The AirTAC SI80AX450 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 450mm stroke. Featuring a SUS420J2 stainless steel rod, it delivers 2513N push and 2268N pull at 0.5MPa. The direct replacement is the SAI80AX450, matching the G3/8 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot take CS1-B/DS1-B sensors. For load holding, the cushion only decelerates; use an external rod lock or SAIL/BSAI variant.
Airtac SI80 Standard Air Cylinder SI80AX450 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80AX450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80AX450 |
| 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 SAI80AX450 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 SAI80AX450 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 SI80AX450
| 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 SI80AX450 Is Used
Long-Stroke Diversion
Pushes heavy pallets 450mm across transfer lines using the 2513N force at 0.5MPa.
Stainless Rod Actuation
Actuates tooling in washdown areas using the SUS420J2 rod option to resist corrosion.
Replacing the Airtac SI80 Standard Air Cylinder SI80AX450 with the SAI80AX450
To replace the SI80AX450, order the SAI80AX450. Confirm the ISO 15552 mounting interface, 80mm bore, 450mm stroke, G3/8 port, and M20x1.5 thread. This non-magnet SKU cannot accept position sensors. If sizing up or down, neighboring bores are 63mm (1559N [email protected]) and 100mm (3927N [email protected]). Because this is a 450mm stroke, use external guides to prevent rod-bending and side-load damage. A plain cylinder drifts on air loss; for held loads, specify a pilot check valve, external rod lock, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80AX450
- ✓ 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 SI80AX450 FAQ
Yes, the SI80AX450 is discontinued. The direct replacement is the SAI80AX450. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 450mm stroke, G3/8 port, and mounting accessories.
The G3/8 port bore provides 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, and a 513kgf max at 1.0MPa. Speed is 30-800mm/s, with a 36mm adjustable cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80AX450
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80AX450 replacement — usually within 7-8 hours.