Patent ID: 6715966
Filing Date: 2004-04-06
Classification: B23C,Y10T

Abstract:
A rotary cutting tool which is to be rotated about an axis thereof for cutting a workpiece, comprising:a generally cylindrical body portion having (a) at least one flute each of which is formed in said cylindrical body portion and each of which extends from an axially distal end of said cylindrical body portion toward an axially proximal end of said cylindrical body portion, and (b) at least one cutting edge each of which is provided by one of widthwise opposite edges of said flute, wherein each of said at least one cutting edge includes a corrugated edge portion having a corrugated shape, and wherein at least one of a pitch and a depth of said corrugated shape is increased with an increase in a diameter of said cylindrical body portion said diameter being defined by a rotary trajectory of an envelope passing through crests of said corrugated shape.