Noise dampener hub assembly for a circular saw

A noise dampener hub assembly for mounting a circular blade on the drive shaft of a circular saw including a spindle hub assembly having an inside noise dampener disc member, a separate outside noise dampener disc member and a spanner hub. The tubular hub member is externally threaded and the spanner hub is internally threaded so that they can be screwed together. The respective inner surfaces of the inside noise dampener disc member and the outside noise dampener disc member have radially spaced annular grooves that removably receive respective O-rings which dampen the noise produced during operation of the circular saw. A pair of pins extend outwardly from the inside noise dampener disc and pass through aligned apertures in the circular saw blade. These pins have different diameters for telescoping into the respective different sized alignment apertures. Also the respective pins and apertures are oriented 170° from each other so that the circular saw blade will always be installed at the same position.