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Manufacturing:
Machining
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Conventional
Machine Tools
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Drilling
and Boring Machines
Hole-making machine tools
are used to drill a hole where none previously
existed; to alter a hole in accordance with
some specification (by boring or reaming
to enlarge it, or by tapping to cut threads
for a screw); or to lap or hone a hole to
create an accurate size or a smooth finish.
Drilling machines vary
in size and function, ranging from portable
drills to radial drilling machines, multispindle
units, automatic production machines, and
deep-hole-drilling machines.
Boring is a process that
enlarges holes previously drilled, usually
with a rotating single-point cutter held
on a boring bar and fed against a stationary
workpiece. Boring machines include jig borers
and vertical and horizontal boring mills.
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