This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX475S, 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 SI80BX475S
The AirTAC SI80 Standard Air Cylinder SI80BX475S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 475mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX475S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke475 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX475S
- 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 SI80BX475S
The AirTAC SI80BX475S is a discontinued double-acting ISO 15552 profile cylinder featuring a 475 mm stroke, SUS304 stainless steel piston rod, and a built-in magnet. Generating 2513 N of push force at 0.5 MPa, it is directly replaced by the SAI80BX475S. This direct upgrade maintains the exact G3/8 port, M20x1.5 thread, and ISO 15552 mounting interface for existing fixtures.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The original SI80BX475S accepts legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80BX475S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX475S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX475S |
| Bore size | Ø80 mm |
| Stroke | 475 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 SAI80BX475S 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 SAI80BX475S 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 SI80BX475S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×475 | 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 SI80BX475S Is Used
External Guided Press
Applies 2513 N clamping force at 0.5 MPa, relying on external guides to prevent rod bending over the long stroke.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX475S with the SAI80BX475S
To replace the SI80BX475S, order the SAI80BX475S. Confirm the ISO 15552 mounting interface, 80 mm bore, 475 mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet and -B SUS304 rod are retained. Because this is a 475 mm stroke, add external guides to prevent rod bending and side-load wear. Sizing both ways: if you need less force, a 63 mm bore yields 1559 N push at 0.5 MPa; if you need more, a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX475S
- ✓ 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 SI80BX475S FAQ
Yes, the SI80BX475S is discontinued. The direct replacement is the SAI80BX475S. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 475 mm stroke, G3/8 port, and SUS304 rod.
It features a G3/8 air port. The force ratings are 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 maximum of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX475S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX475S replacement — usually within 7-8 hours.