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CANTILEVER TOOL MANDREL

  • US 3,820,422 A
  • Filed: 05/29/1973
  • Issued: 06/28/1974
  • Est. Priority Date: 05/29/1973
  • Status: Expired due to Term
First Claim
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1. A cantilever tool mandrel comprising a head on its free end with a cutting tool fastened therein, at least two portions fabricated from different materials, one of said portions being adjacent to the fastening place of said mandrel and being fabricated from a material with a modulus of elasticity of at least 1.5 times higher than that of the material of the other said portions, said other portion being adjacent to said head and having a material density of at least 1.5 times lower than that of the material of said portion of the mandrel adjacent to the fastening place of the said mandrel, the length of each portion of said mandrel being from 40 percent to 60 percent of the total length of the mandrel.

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