Patent ID: 8961077
Filing Date: 2015-02-24
Classification: B23C,Y10T

Abstract:
1. A tool comprising a spiral end cutting mill, said spiral end cutting mill having an elongate retaining end; a frustoconical shell cutter, said frustoconical shell cutter having a central bore, said retaining end received in said central bore, and said shell cutter locked to said cutting mill for rotation therewith; a tubular retainer having a central opening, said retaining end also received in said tubular retainer; a projection on one of said tubular retainer and said shell cutter; a groove in the other of said tubular retainer and said shell cutter, said projection received in said groove wherein said shell cutter is locked for rotation with said retainer; a flat on said retaining end; a set screw in said retainer, said set screw contacting said flat for locking said cutting mill to said retainer; wherein the projection has a height equal to a depth of the groove, and wherein the projection has a projection width equal to a groove width of the groove; wherein the projection is a first projection and the groove is a first groove, the tool further comprising: a second projection on one of said tubular retainer and said shell cutter; and a second groove in the other of said tubular retainer and said shell cutter, wherein said second projection is received in the second groove; wherein the second projection has a second height equal to a second depth of the second groove, and wherein the second projection has a second projection width equal to a second groove width of the second groove.