Robert G Simons

US Patent:

46430512, Feb 17, 1987

Filed:

Dec 6, 1985

Appl. No.:

6/806253

Inventors:

Robert W. Simons - Pasadena TX
Danny E. Scott - Houston TX
John R. Poland - Houston TX

Assignee:

Hughes Tool Company-USA - Houston TX

International Classification:

C21D 922

US Classification:

76108A

Abstract:

A method of manufacturing an earth boring bit of the type having a bearing pin which extends from a head section of the drill bit for rotatably mounting a cutter. A container is provided having opposing end openings with sidewalls therebetween which define a container interior. The container is placed over a portion of the head section so that the pin extends within the interior of the container. A spring spacer is then installed within the interior of the container about at least a portion of the circumference of the bearing pin at at least one axial location. The container is then packed with a particulate treating medium, the container is covered, and the pin and container are placed into a furnace for a time and at a temperature sufficient to activate the treating medium.