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Size | 17/32 X 1/2 REDUCED SHANK, 3/4 X 1/2 REDUCED SHANK, 5/8 X 1/2 REDUCED SHANK, 7/8 X 1/2 REDUCED SHANK |
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Bordo 2651 Series – Assorted sizes available
118° notched point 30° helix
Bordo reduced shank HSS drills are ground and then a black finish is achieved by steam tempering, a thermal process resulting in a porous tool coating. This surface aids chip flow and heat dissipation. The drill is then ground a second time to achieve a bright finish on the shank and cutting edges.