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Grooving or threading tool

  • US 4,871,286 A
  • Filed: 05/05/1989
  • Issued: 10/03/1989
  • Est. Priority Date: 10/24/1988
  • Status: Expired due to Term
First Claim
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1. An elongated grooving and threading tool of the type having a radially projecting cutting edge, said tool comprising a cutting section having an axially extending bore and a radially projecting cutting edge,a hollow cylindrically shaped rearward section comprising cemented carbide,a cylindrically shaped intermediate section having a threaded axially aligned bore extending therethrough, said intermediate section positioned intermediate said cutting section and said cemented carbide section,a first connection formed at the juncture of said intermediate section and said cutting section,a fastener threadingly engaging said threaded bore for holding said cutting section and said intermediate section together at said first connection,a second connection formed at the juncture of said intermediate section and said rearward section,a drawbar connected between said cutting section and said rearward cemented section under tension for holding said intermediate section and said rearward section in axial alignment along said axis under a compressive force,means for centering said drawbar relative to the rearward section for preventing relative radial movement between the forward end of said drawbar and the rearward section,each of said first and said second connections comprising a key and a keyway and a pair of first and second surfaces.

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