This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX450S, 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 SI80BX450S
The AirTAC SI80 Standard Air Cylinder SI80BX450S 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 SAI80BX450S, 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 → SAI80BX450S
- 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 SI80BX450S
The AirTAC SI80BX450S is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore, 450mm stroke, SUS304 stainless rod, and piston magnet. Generating 2513N push force at 0.5MPa, it is replaced by the SAI80BX450S. This direct upgrade shares the exact ISO 15552 mounting interface, G3/8 port, and M20x1.5 rod thread, fitting existing fixtures perfectly.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the legacy line.
Airtac SI80 Standard Air Cylinder SI80BX450S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX450S |
| 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 SAI80BX450S 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 SAI80BX450S 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 SI80BX450S
| 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 SI80BX450S Is Used
Vertical Pressing
Performs downward pressing and forming tasks where the 128kg vertical lift capacity and SUS304 stainless rod resist corrosion and handle moderate loads.
Pallet Handling
Actuates heavy-duty pallet stops and lifts in automated storage systems, requiring the 80mm bore's 2513N thrust and robust ISO 15552 mounting.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX450S with the SAI80BX450S
To replace the SI80BX450S, order the SAI80BX450S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 air port, and the CS1-B/DS1-B legacy sensors (the SAI uses current AirTAC switches). If you need less force, the 63mm bore offers 1559N push at 0.5MPa; if you need more, the 100mm bore provides 3927N. Note that a 450mm stroke requires external guides to prevent rod bending and side-load damage. For load holding on air loss, the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX450S
- ✓ 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 SI80BX450S FAQ
Yes, the SI80BX450S is discontinued. The direct replacement is the SAI80BX450S. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 450mm stroke, G3/8 port, and mounting interface, so it drops directly into existing fixtures.
The 80mm bore uses a G3/8 air port. At 0.5MPa it provides 2513N push and 2268N pull force. At 0.7MPa push is 3518N, and at 0.9MPa it is 4523N. The theoretical maximum force is 513kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX450S replacement — usually within 7-8 hours.