Indexable spherical seat cutter

  • US 5,232,317 A
  • Filed: 08/31/1992
  • Issued: 08/03/1993
  • Est. Priority Date: 07/22/1991
  • Status: Expired due to Term
First Claim
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1. A rotary cutting tool comprising a body having a central axis of rotation, a plurality of like cutting insert receiving pockets located at one end of said body, each of said pockets having a flat rear wall and a plurality of like side walls extending forwardly from said rear wall, a plurality of like cutting inserts each having parallel front and rear faces and a plurality of like symmetrically disposed side walls each having cutting edges respectively defined by the intersection of the side walls of the insert with the front face thereof, said side walls of each pocket being oriented to engage side walls of one of said inserts when the rear face of the insert is seated in face to face engagement with the rear wall of the pocket and to locate an unengaged cutting edge of said insert in a cutting position projected axially beyond said one end of said body, retaining means for detachably retaining each insert in the aforementioned seated relationship in the respective pocket, said inserts having a thickness between the front and rear faces thereof such that the plane of the front face of each insert is offset forwardly of said axis with respect to the direction of rotation of the body when the rear face of each insert is in face to face engagement with the rear wall of one of said pockets, wherein said respective unengaged cutting edge of each insert sweeps a common, coextensive spherical zone with respect to each other unengaged cutting edge, said spherical zone centered on the central axis of rotation of said body when said inserts are in said cutting position.

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