Patent ID: 6966611

Claim:
A tool assembly for insertion into a tool holder having a planar forward surface and a transverse mounting hole having and an inner diameter, said tool assembly comprising in combination a tool having a tapered forward cutting end, a radial flange aligned axially behind said forward cutting end, a cylindrical shank aligned axially behind said radial flange, and said cylindrical shank having an outer diameter less than said inner diameter of said transverse hole, a retainer sleeve around said cylindrical shank for retaining said shank in said cylindrical hole, a washer having an inner annular surface, a forward surface and a rearward surface, said inner annular surface having a diameter greater than that of said shank, a layer of compressible material bonded to said inner annular surface, no portion of said compressible material extending forward of said forward surface of said washer, said retainer sleeve fitted around a circumference of said shank, and said washer fitted around said shank and said retainer sleeve, wherein said layer of compressible material will retain said washer on said shank.