Cutting by use of rotating axially moving tool – Tool or tool with support – Having stepped cutting edges
Patent
1982-12-27
1986-08-12
Briggs, William R.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having stepped cutting edges
408225, 408230, B23B 5100
Patent
active
046053476
ABSTRACT:
A drill/reamer bit is described that is particularly suitable for high speed operation and which comprises a bit having a "split" pilot or drill portion with four facets and two cutting edges on each web and a "step" or reamer portion having two reliefs and one cutting edge associated with each web, the webs being formed by a pair of flutes angled at from approximately 81/2.degree. to approximately 23.degree., the bit being formed primarily of fine grain tungsten carbide material, the drill portion having an included angle of approximately 118.+-.2 degrees.
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Jodock Marvin S.
Maternus Fred
Alleman Rodger N.
Briggs William R.
Lockheed Missiles & Space Company Inc.
National Carbide Tool, Inc.
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