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OPERATION
DRILLING SPEEDS
The following is intended to be a general
rule-of-thumb, not specific information.
Important drilling speed factors are the type
of material, hole size, the type of drill
bit/cutter and the desired cut quality. The
smaller the drill bit, the higher the speed
required
and
soft
require a higher speed while hard materials
a slower speed.
METALWORKING
A metal work-piece (like all work) should be
firmly clamped to the drill press table and
the table securely locked. NEVER hold the
work-piece with your bare hands. The drill
bit may grab and cause serious personal
injury.
Flat metal pieces should be backed with
scrap wood and clamped.
Irregular-shaped pieces should be blocked
and clamped.
WOODWORKING
Metal-piercing twist drills may be used on
wood but the preferred choice is brad-point
bits or Forstner-type bits. Do not use auger
bits, as they will tend to lift off the table. To
prevent tear-out when drilling through a
work-piece, back it with a piece of scrap
wood.
materials
generally
FEEDING
Be aware of the sound of the drill press
motor when drilling.
Do not rotate the feed handles too quickly
as the belts may slip or the motor may stall.
Feeding too slowly may cause the drill bit to
heat up and possibly burn the work-piece.
14
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