.~ Bit with leading portion (e.g., pilot) forming smaller diameter initial bore {6}
392
.~.~ Leading portion is forked rotary type
DEFINITION
Classification: 175/392
(under subclass 385) Apparatus comprising a rotary bit in which the leading or pilot portion is provided with two or more axially extending branches terminating in cutting edges.
SEE OR SEARCH THIS CLASS, SUBCLASS:
387, for bits having a core forming leading portion, and generally defining axial leading branches.
421, and the search there noted for bits having axially extending branches terminating in cutting edges.
