Abstract: A mini cutting bit includes a shank, a cutting part and a bit tip, wherein the cutting part has opposite ends connected to the shank and the bit tip. The bit tip and the cutting part are made of different materials, and the bit tip is harder than the cutting part.

Abstract: A mini cutting bit includes a shank and a cutting part. The cutting part has a first spiral portion and a second spiral portion parallelly and twistedly formed thereon. The cutting part further has two chip removal flutes between the first and the second spiral portions. The first spiral portion has a first chip breaking flute on a top thereof while the second spiral portion has a second chip breaking flute. Widths of the first and the second chip breaking flutes are smaller than that of the tops of the first and the second spiral portions respectively.