US PATENT SUBCLASS 408 / 206
.~.~ And having stepped cutting edges

Current as of: June, 1999
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408 /   HD   CUTTING BY USE OF ROTATING AXIALLY MOVING TOOL

199  DF  TOOL OR TOOL WITH SUPPORT {12}
204  DF  .~ Having axial, core-receiving central portion {2}
206.~.~ And having stepped cutting edges

DEFINITION

Classification: 408/206

(under subclass 204) Device including a plurality of cutting edges disposed about the tool-axis and positioned at

different radial distances from the tool-axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

189+, for an adjustable tool having stepped cutting edges.

223+, for a tool having stepped cutting edges, but no core-receiving portion.