This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X80FB, 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 SI80X80FB
The AirTAC SI80 Standard Air Cylinder SI80X80FB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 80mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X80FB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X80FB
- 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 SI80X80FB
The AirTAC SI80X80FB is a discontinued double-acting ISO 15552 profile cylinder featuring an 80 mm bore and 80 mm stroke. Built with an extruded aluminum barrel and an FB flange mounting interface, it delivers 2513 N of push force at 0.5 MPa through its G3/8 air port. Because this legacy SI unit is end-of-life, you should order the direct replacement: the SAI80X80FB. It shares the same ISO 15552 mounting dimensions, bore, stroke, output force, and port size, fitting existing fixtures perfectly.
The SAI upgrade introduces a modernized piston seal utilizing two Y-shaped one-way elements for extended lifespan and lower start-up pressure. Note that this specific SKU lacks a magnet (-S), so it cannot accept position sensors. The SAI family also adds SAIL, SAIF, and BSAI lock or valve variants that the original SI line lacked.
Airtac SI80 Standard Air Cylinder SI80X80FB Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X80FB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X80FB |
| Bore size | Ø80 mm |
| Stroke | 80 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 SAI80X80FB 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 SAI80X80FB 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 SI80X80FB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×80 | 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 SI80X80FB Is Used
Clamp Actuation
Provides robust 2513 N clamping force at 0.5 MPa for securing heavy workpieces during CNC machining operations.
Package Diverting
Drives heavy-duty diverter arms on packaging lines where the 80 mm stroke and FB flange handle repeated lateral impacts.
Pallet Stopping
Acts as a high-force pneumatic stop for loaded pallets on roller conveyors, decelerating loads smoothly via adjustable cushions.
Replacing the Airtac SI80 Standard Air Cylinder SI80X80FB with the SAI80X80FB
To replace the discontinued SI80X80FB, order the SAI80X80FB. Verify your ISO 15552 interface, 80 mm bore, 80 mm stroke, G3/8 port thread, and FB flange mounting accessory. Because this SKU has no magnet, it cannot support switches; if you need sensing, select an SAI80X80FBS. You can size both ways: step down to a 63 mm bore for lighter loads, or up to 100 mm for more force. At 0.5 MPa, the 80 mm bore yields 2513 N push and 2268 N pull. A plain cylinder does not hold load without live air—the cushion only decelerates. For load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X80FB
- ✓ 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 SI80X80FB FAQ
Yes, the SI80X80FB is discontinued. The direct replacement is the SAI80X80FB. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 80 mm stroke, G3/8 port, FB flange mount, and output force, so it drops directly into existing fixtures.
The G3/8 port feeds a 25 mm rod. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and 4523 N push at 0.9 MPa. The theoretical maximum force is 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X80FB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X80FB replacement — usually within 7-8 hours.