Idiomas disponibles
Idiomas disponibles
OPERATION
WORKPIECE METHOD (FIG. 21 & 22)
1. Mark the desired depth (Fig. 22 - 5) of the drill hole on
the side of the workpiece.
2. With the drill press in the OFF position, bring the drill bit
(Fig. 22 - 6) down until the tip is even with the mark.
3. Holding the feed handles at this position, rotate the depth
knob (Fig. 21 - 2) until it meets the metal support.
4. The chuck and the drill bit will now be stopped at
the distance selected on the depth scale.
DRILLING SPEEDS
There are a few important factors to keep in mind when
determining the best drilling speed:
• Material type
• Hole size
• Drill bit or
cutter type
• Quality
desired
Smaller drill bits
require greater
speed than larger
drill bits. Softer
materials require
greater speed than
harder materials.
See page 12
for recommended
speeds for particular
materials.
Fig. 22
DRILLING METAL
• Use metal-piercing twist drill bits.
• It is always necessary to lubricate the tip of the drill with
oil to prevent overheating of the drill bit.
1
2
4
3
Fig. 21B
6
• All metal workpieces should be clamped down securely.
Any tilting, twisting, or shifting causes a rough drill hole,
and increases the potential of drill bit breakage.
• Never hold a metal workpiece with your bare hands. The
cutting edge of the drill bit may seize the workpiece and
throw it, causing serious injury. The drill bit will break if
the metal piece suddenly hits the column.
• If the metal is flat, clamp a piece of wood under it to
prevent turning. If it cannot be laid flat on the table,
then it should be blocked and clamped.
DRILLING WOOD
• Brad point bits are preferred. Metal piercing twist bits
may be used on wood.
• Do not use auger bits. Auger bits turn so rapidly that
they can lift the workpiece off of the table and whirl
it around.
• Always protect the drill bit by positioning the table so
that the drill bit will enter the center hole when drilling
through the workpiece.
• To prevent splintering, feed the drill bit slowly right as
the bit is about to cut through to the backside of
the workpiece.
• To reduce splintering and protect the point of the bit,
use scrap wood as a backing or a base block under
the workpiece.
FEEDING THE DRILL BIT
• Pull down on the feed handles with only enough force to
allow the drill bit to cut.
• Feeding too rapidly might stall the motor, cause the belt
to slip, damage the workpiece, or break the drill bit.
• Feeding too slowly will cause the drill bit to heat up and
burn the workpiece.
MECHANICAL VARIABLE SPEED (FIG. 23)
This is a mechanical variable speed drill press. To increase or
decrease the speed when operating, raise or lower the speed
handle (Fig. 23 - 1). Use the following table to determine the
recommended
speed for the drill
size you are using
and the type of
material you are to
drill. While drilling,
5
check the speed
on the digital speed
readout (Fig. 23 - 2)
located at the front
of the drill press.
11
1
Fig. 23
2
