Drill Bits and Chucks
engineering fundamentals Drill Bits and Chucks
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Twist Drill Bit
The figure below labels the important angles for a typical twist drill bit.


Drill Bit Variety
The figures below illustrate various drill bits and their cut hole configurations.



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Drill Chucks
Drill chucks can be of several types, but are typically three-jaw since three points on the circumference define a circle in two dimensions. A standard three-jaw and a multi-jaw chuck are shown in the figures below.

For a look at the mechanism of a three-jaw chuck, see the lathe section. The drill bit and chuck assembly can be mounted on a drill press, discussed in the drill press section.

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