Patent ID: 6851418
Filing Date: 2005-02-08
Classification: B23C,B24D,Y10T

Abstract:
1. A metal bonded drilling and boring tool comprising: a rod-shaped body having a substantially semispherical front end portion; numerous abrasive grains bonded to an outer circumferential surface of said rod-shaped body at said front end portion and at a portion having a given length from said front end portion by a bond member formed primarily of copper alloy; said bond member containing a material selected from the group consisting of Ti, Al, and a mixture thereof; an average abrasive grain projection height being set to 30% or more of an average abrasive grain diameter, where said abrasive grain projection height is defined as a distance between the surface of a deepest portion of said bond member present between any two adjacent ones of said abrasive grains and the top of each of said two adjacent abrasive grains; and an average abrasive grain spacing being set to 200% or more of said average abrasive grain diameter, where said abrasive grain spacing is defined as a distance between the tops of said two adjacent abrasive grains.