Cold headed center vacuum drill bit

Details Cold headed center vacuum drill bit Cold headed center vacuum drill bit

E - Fixed Constructions

21

B

E21B 10/58 (2006.01) B21K 5/02 (2006.01) B21K 5/04 (2006.01) E21B 10/38 (2006.01) E21B 10/46 (2006.01) E21B 10/56 (2006.01)

Patent

CA 2095602

A drill bit(10) for drilling holes in a work surface including a hard wear-resistant insert (12) and a metal body (14) includ- ing a top working surface (16) of an irregular surface configuration having a slot (36) for retaining the hard wear-resistant insert (12). The body (14) having a metal grain structure substantially parallel with the contour of the body. In a preferred embodiment the body (14) is formed by cold-heading.

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