This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX450, 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 SI80BX450
The AirTAC SI80 Standard Air Cylinder SI80BX450 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 SAI80BX450, 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 → SAI80BX450
- 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 SI80BX450
The AirTAC SI80BX450 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 450 mm stroke. It delivers 2513 N of push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI80BX450, a direct replacement sharing the exact same ISO 15552 mounting interface, stroke, force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. This SI80BX450 variant uses a SUS304 stainless steel rod (B) for corrosion resistance, but lacks a magnet, meaning it cannot accept position sensors. For load holding, note that standard cylinders drift without live air; consider the SAIL lock or BSAI clamp-lock variants.
Airtac SI80 Standard Air Cylinder SI80BX450 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX450 |
| 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 SAI80BX450 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 SAI80BX450 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 SI80BX450
| 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 SI80BX450 Is Used
Long-Stroke Diversion
Drives large packages across wide conveyor belts with its 450 mm stroke and 2513 N push force at 0.5 MPa.
Pallet Handling
Indexes heavy pallets in automated storage systems, utilizing the SUS304 rod for washdown corrosion resistance.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX450 with the SAI80BX450
To replace the discontinued SI80BX450, order the SAI80BX450. Verify your ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 450 mm stroke, and the G3/8 port. Because this SKU lacks the S suffix, it has no magnet and cannot support CS1-B or DS1-B sensors; if sensing is required, switch to an SAI80X450S model. For sizing, the 80 mm bore yields 2513 N push at 0.5 MPa; dropping to a 63 mm bore reduces push to 1559 N, while an 80 mm bore at 0.7 MPa provides 3518 N. With a 450 mm stroke, prevent rod bending by using external guides to absorb side loads. A plain cylinder does not hold load without air; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX450
- ✓ 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 SI80BX450 FAQ
Yes, the AirTAC SI80BX450 is discontinued. The direct replacement is the SAI80BX450. It shares the identical ISO 15552 mounting interface, 80 mm bore, 450 mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
The 80 mm bore cylinder features a G3/8 port and provides 2513 N push and 2268 N pull at 0.5 MPa. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX450
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