Patent ID: 8613574
Filing Date: 2013-12-24
Classification: B23C,Y10T

Abstract:
1. A helical milling cutter comprising: an outer surface; a rotational axis about which the outer surface rotates; a first row having two or more inserts; a second row having two or more inserts, the second row being adjacent to the first row; a third row having two or more inserts, the third row being adjacent to the second row, wherein the first, second and third rows are arranged on the surface generally perpendicular and circumferentially about the rotational axis; two or more columns formed on the outer surface and extending across the first, second and third rows, wherein the two or more columns extend helically along at least part of and parallel to the rotational axis and are spaced apart on the outer surface, wherein the two or more inserts of the first, second and third rows in each of the two or more columns form one or more cutting edges along the rotational axis that define a layout line having a non-uniform varied slope beyond the first row and each layout line is identical in shape to all other layout lines.