This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80BX300, 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 SI80BX300
The AirTAC SI80 Standard Air Cylinder SI80BX300 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80BX300, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80BX300
- 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 SI80BX300
The AirTAC SI80BX300 is a discontinued double-acting ISO 15552 profile cylinder with an 80mm bore and 300mm stroke. It delivers 2513N push and 2268N pull at 0.5MPa via a G3/8 port. The direct replacement is the SAI80BX300, matching the bore, stroke, force, port, and ISO 15552 mounting interface. This SKU uses a SUS304 stainless piston rod (-B) for corrosion resistance, but because it lacks a magnet (-S), it cannot accept a position sensor.
The SAI80BX300 upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Note that a plain cylinder drifts on air loss; the cushion only decelerates.
Airtac SI80 Standard Air Cylinder SI80BX300 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80BX300 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80BX300 |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAI80BX300 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 SAI80BX300 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 SI80BX300
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | 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 SI80BX300 Is Used
Carton Diverting
Actuates diverting arms on packaging lines to route heavy cardboard cartons at high speed.
Pallet Pressing
Provides the 2513N push force needed to compact materials or seat components onto pallets.
Heavy Gate Control
Operates large access doors or safety gates in industrial facilities requiring a 300mm stroke.
Replacing the Airtac SI80 Standard Air Cylinder SI80BX300 with the SAI80BX300
To replace the SI80BX300, order the SAI80BX300. Confirm the ISO 15552 mounting interface, the 300mm stroke, and the G3/8 port (available in PT, G, or NPT). Because this is a non-magnet SKU, it cannot take a CS1-B or DS1-B sensor; if sensing is needed, specify an SAI with the -S magnet option. The 80mm bore yields 2513N push at 0.5MPa; if you need less force, the 63mm bore offers 1559N, while the 100mm bore provides 3927N. At 300mm stroke, use an external guide to prevent rod bending and side-load wear. For load holding on air loss, add an external rod lock or pilot check valve, or select the SAIL or BSAI lock variant, as the cushion only decelerates.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80BX300
- ✓ 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 SI80BX300 FAQ
Yes, the AirTAC SI80BX300 is discontinued. The direct replacement is the SAI80BX300. It is dimensionally interchangeable per ISO 15552, matching the 80mm bore, 300mm stroke, 2513N force, G3/8 port, and mounting interface.
This double-acting cylinder has a G3/8 air port. It delivers 2513N push and 2268N pull at 0.5MPa, 3518N push at 0.7MPa, 4523N push at 0.9MPa, and a theoretical max of 513 kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80BX300
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80BX300 replacement — usually within 7-8 hours.