Method of making lug journal for roller cutter drill bits

Details Method of making lug journal for roller cutter drill bits Method of making lug journal for roller cutter drill bits

1989-11-16

1991-01-08

Bishop, Steven C.

Metal working

Method of mechanical manufacture

Process for making bearing or component thereof

761082, 82 111, 82131, 408 1R, B21D 5310, B23B 322

Patent

active

049824961

ABSTRACT:
A method of machining a journal (14) on a lug (10) for a roller cutter drill bit in which the stand (22) holding the lug (10) is fixed and a cutting tool (26) is mounted on a holder ( 24) over the journal (14) for rotating about the journal (14). Two separate machining procedures for the journal (14) are provided with each machining procedure employing a separate cutting tool (24). A rough truing cut is made with a first cutting tool (24) and a final finish cut is made with a sharp second cutting tool (24) having cutting surfaces unused except on the finish surfaces.

REFERENCES:
patent: 4599921 (1986-07-01), Gaither et al.
patent: 4626149 (1986-12-01), Holy et al.
patent: 4660444 (1987-04-01), Sorensen et al.

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