Mining drill bit

Details Mining drill bit Mining drill bit

E - Fixed Constructions

21

B

255/82

E21B 10/00 (2006.01) E21B 10/38 (2006.01)

Patent

CA 1092595

ABSTRACT OF THE DISCLOSURE An improved roof drill bit for use in mining operations in which a carbide insert is diametrically located in a cylindrical body and held on axial prongs in diametrically opposed quadrants of the body by a brazed connection; diverging axial holes for coolant are positioned in said prongs to open at the trailing side of the cutting edges of the carbide insert to flood the edges with coolant liquid and flush cuttings into the other quadrants. The coolant passages also pass near the brazed face of the insert to cool the body in this area and minimize softening of the braze. i.

313115

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