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Drill Bits
You can never have too many drill bits because
they tend to wear out with use and must be
sharp in order to drill smoothly. Fortunately,
the same bits can be used for a hand drill,
a power drill, and a drill press. The variations, other
than size, are primarily in the composition
and the intended material to be drilled.
The other difference is in style: a twist
bit (looks like a candy cane) or a spade
bit. (flat with a point on the end).
Twist Bits
Twist bits can be used on wood, metal, plastics
and other soft materials. The most frequent
complaint of twist bits is that the smaller
diameters sizes break easily, so use care
not to apply any diagonal force to the bit
when drilling.
Carbon steel bits are designed for drilling
wood, so don't use them on metal. High speed
steel bits, on the other hand, are god for
drilling most types of material. A third
variety, Titanium coated bits (they are gold
in color) is especially designed for drilling
metal because the coating hardens the bit
and provides a small measure of self-lubrication.
Masonry Bits
Use a masonry bit for drilling
brick, block,
stone, quarry tiles or concrete.
The cutting
tip is made from tungsten carbide
bonded
to a spiralled steel shaft. When
using a
masonry bit, use a slow speed
setting so
that you don't overheat the tip.
Specialty Bits
Other bits are available for
drilling tile
and glass, dowels, large holes,
holes with
flat bottoms, and for countersinking
screws.
See your retailer or search through
the advertisers
on the right for more details
on these specialty
bits. |
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