Metal bonded drilling and boring tool

Details Metal bonded drilling and boring tool Metal bonded drilling and boring tool

2005-02-08

2005-02-08

Rachuba, M. (Department: 3723)

Stone working

Tools

C408S144000, C408S145000, C451S540000

Reexamination Certificate

active

06851418

ABSTRACT:
A metal bonded drilling and boring tool which can prevent the separation of abrasive grains during drilling and boring to maintain a stable working performance for a long period of time without the need for tool exchange. The tool includes a rod-shaped body having a substantially semispherical front end portion and numerous abrasive grains bonded to an outer circumferential surface of the rod-shaped body at the front end portion and at a portion having a given length from the front end portion by a bond member formed primarily of copper alloy. The bond member contains a material selected from the group consisting of Ti, Al, and a mixture thereof. The copper alloy is selected from the group consisting of bronze containing 10 to 33 wt % of Sn, brass containing 5 to 20 wt % of Zn, and aluminum bronze containing 5 to 20 wt % of Al.

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