A high-speed milling cutter is provided that includes a hub rotatable about an axis, a plurality of radially extending arms, and a plurality of cutting inserts, each of which is connected to a distal portion of one of the arms. The arms are tapered with respect to both the horizontal and vertical planes in such a manner that centrifugally induced tensile stresses are substantially equal at all points between the proximal and distal ends. The cross-sectional area of each arm increases at each point radially inwardly so that the ratio of tensile strength to the amount of centrifugal force generated by the cumulative, peripheral mass of the arm at that point remains substantially constant throughout the length of the arm.