GUNSMITHING AND TOOL MAKING BIBLE

(Tuis.) #1

DEEP HOLE DRILLS


Let us talk a little about the Deep Hole Drill, Sizes, and the Grinding of the drill. What a Deep Hole Drill
look like, and some of the terminology of the carbide drill.


I will not go into the grinding too much of the Deep Hole Bits, as most will buy the sizes that they need.
When you have to buy the 'V' tube, and the drill tips, and install the drill driver, and tip, it is just about as
cheap to buy the completed drill. If you want to grind your drill tips, the various makers if carbide tools
will be able to supply you with the several sizes of Carbide deep hole drill tips that you will need. The
grade of carbide usually supplied for deep hole tips is 883.


GRINDING THE TIPS


To set up for grinding the deep hole tips, all that is necessary is to turn 2 short pieces of drill rod, about 1
inch long, center one end of each piece. The drill rod should be the same size as the drill tip that you are
planning to grind. Get a small V way, or a piece of finish angle. Lay the tip and the 2 pieces of drill rod,

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