Patent ID: 8573898

Claim:
A method of manufacturing a multi-tooth fir-tree, or bulbous form milling cutter, by the grinding of a blank with a grinding wheel, wherein, (i) a flat clearance angle Θ of between 0° and 20° is generated on each tooth, by the path of the grinding wheel, with each tooth having a width (X) from tip to point of maximum clearance, calculated as follows: — X ={[( R tan Θ)cos Θ] cos Θ}±0.25% where R=radius of cutter, and where Θ=clearance angle measured from a tangent to the tooth tip, and furthermore, wherein (ii) each tooth has a variable depth (Y) around the cutter, calculated as follows: Y={[πD]/[ 180/Θ]}0.5±0.2, where D=maximum diameter of the form at any given point along the form.