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Tip
#26
Drill Press
(continued)
Click
here for a printer friendly version of Tip-
Pg. 1-3, Pg
4-6, Pg 7-9, Pg
10-12,
Pg
13-15, Pg
16-18, Pg
19-21, Pg 22-24
Drilling
Plastics
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Figure
7-65. For best results when drilling plastic, use
a plastic-drilling bit. These special bits are ground
at a steep angle to make a smooth cut in different types
of plastic.
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When drilling
plastics, work at a fairly slow speed, between "Slow" (700
RPM) and "0" (1050 RPM). The larger the hole, the slower the
speed should be. If you go too fast, the bit will heat up
and melt the plastic.
Don't
use brad-point bits; you will dull them. You can use a twist
bit, but you risk splintering certain types of plastic. The
best bit is a special plastic-drilling bit. These bits have
a tip ground at 60° for a smoother cut in plastic (Figure
7-65). Warning: Do not use twist bits to drill plastics.
They will splinter certain types of plastic.
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Introduction
Back to Metal Drilling
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