Milwaukee 0370-20 Manual Del Operador página 3

EXTENSION CORDS
Grounded tools require a three wire extension
cord. Double insulated tools can use either a two
or three wire extension cord. As the distance from
the supply outlet increases, you must use a heavier
gauge extension cord. Using extension cords with
inadequately sized wire causes a serious drop in
voltage, resulting in loss of power and possible tool
damage. Refer to the table shown to determine the
required minimum wire size.
The smaller the gauge number of the wire, the
greater the capacity of the cord. For example, a 14
gauge cord can carry a higher current than a 16
gauge cord. When using more than one extension
cord to make up the total length, be sure each cord
contains at least the minimum wire size required.
If you are using one extension cord for more than
one tool, add the nameplate amperes and use the
sum to determine the required minimum wire size.
Guidelines for Using Extension Cords
• If you are using an extension cord outdoors, be
sure it is marked with the suffi x "W-A" ("W" in Cana-
da) to indicate that it is acceptable for outdoor use.
READ AND SAVE ALL INSTRUCTIONS FOR FUTURE USE.
WARNING
To reduce the risk of injury,
always unplug tool before changing or re-
moving accessories. Only use accessories
specifi cally recommended for this tool. Others
may be hazardous.
Installing Bits into
Keyed Chucks
1. Open the chuck
jaws wide enough
to insert the bit. Be
sure the bit shank
and chuck jaws are
clean. Dirt particles
may prevent the bit
from lining up prop-
erly.
• Be sure your extension cord is properly wired
and in good electrical condition. Always replace a
damaged extension cord or have it repaired by a
qualifi ed person before using it.
• Protect your extension cords from sharp objects,
excessive heat and damp or wet areas.
Recommended Minimum Wire Gauge
For Extension Cords*
Extension Cord Length
Nameplate
25' 50' 75'
Amperes
0 - 2.0 18 18 18
2.1 - 3.4 18 18 18
3.5 - 5.0 18 18 16
5.1 - 7.0 18 16 14
7.1 - 12.0 16 14 12
12.1 - 16.0 14 12 10
16.1 - 20.0 12 10
* Based on limiting the line voltage drop to fi ve volts at
150% of the rated amperes.
ASSEMBLY
2. When using drill bits, insert the bit into the chuck.
Center the bit in the chuck jaws and lift it about
1/16" off of the bottom. Tighten the chuck jaws by
hand to align the bit.
When using screwdriver bits, insert the bit far
enough for the chuck jaws to grip the bit shank.
Tighten the chuck jaws by hand to align the bit.
3. Place the chuck key in each of the three holes in
the chuck, turning it clockwise as shown. Tighten
securely.
4. To remove the bit, insert the chuck key into one of
the holes in the chuck and turn it counterclockwise.
WARNING
To prevent personal injury,
always remove the chuck key from the chuck
after each use.
4
WARNING
always unplug tool before attaching or remov-
ing accessories or making adjustments. Use
only specifi cally recommended accessories.
Others may be hazardous.
WARNING
wear safety goggles or glasses with side
shields.
100' 150'
Using Forward/Reverse
Switch
18 16
16 14 1. For forward (clockwise)
14 12
rotation, slide the forward/
12 12
reverse switch to the left.
10
2. For reverse (counterclock-
wise) rotation, slide the
forward/reverse switch to
the right.
NOTE: To prevent damage
to the motor, allow the tool
to come to a complete stop
before reversing.
WARNING
sonal injury, always brace or hold tool securely.
Starting, Stopping and Controlling Speed
1. To start the tool, pull the paddle switch.
2. To stop the tool, release the paddle switch.
3. To vary the driving speed, increase or decrease
pressure on the paddle switch. The further the
paddle switch is pulled, the greater the speed.
Selecting Bits
When selecting a bit, use the right type for your
job. For best performance, always use sharp bits.
Drilling in Wood, Composition Materials and
Plastic
When drilling in wood, composition materials and
plastic, start the drill slowly, gradually increasing
speed as you drill. When using twist drill bits, pull
the bit out of the hole frequently to clear chips from
the bit fl utes. Use low speeds for plastics with a
low melting point.
Drilling in Masonry
When drilling in masonry, use high speed carbide-
tipped bits. Drilling soft masonry materials such as
cinder block requires little pressure. Hard materials
like concrete require more pressure. A smooth,
even fl ow of dust indicates the proper drilling rate.
Do not let the bit spin in the hole without cutting.
Do not use water to settle dust or to cool bit. Both
actions will damage the carbide.
OPERATION
WARNING
To reduce the risk of injury,
sion, electric shock and property damage,
always check the work area for hidden pipes
and wires before drilling.
Drilling
1. Before drilling, be sure the workpiece is clamped
securely. Use backing material to prevent dam-
To reduce the risk of injury,
age to the workpiece during breakthrough.
2. When starting a hole, place the drill bit on the
work surface and apply fi rm pressure. Begin
drilling at a slow speed, gradually increasing the
Fig. 2
speed as you drill.
3. Use enough pressure on the tool to keep the bit
drilling or driving constantly, but do not push hard
enough to stall the bit.
4. Reduce pressure and ease the bit through the
Reverse
last part of the hole. While the tool is still running,
pull the bit out of the hole to prevent jamming.
Forward
Stalling
If the tool seems as if it is about to stall, maintain a
fi rm grip and reduce pressure slightly to allow the
bit to regain speed. If the tool does stall, release
the paddle switch immediately. Reverse the motor,
remove the bit from the work and start again. Do
To reduce the risk of per- not press the paddle switch on and off in an attempt
to start a stalled drill. This can damage the drill.
APPLICATIONS
Drilling in Metal
When drilling in metal, use high speed steel twist
drills or hole saws. Use slow speeds for hard metals
and high speeds for softer metals. Lubricate drill
bits with cutting oil when drilling in iron or steel. Use
a coolant when drilling in nonferrous metals such
as copper, brass or aluminum. Back the material
to prevent binding and distortion on breakthrough.
Driving Screws
When driving screws, use the proper screwdriver
bit for your job. After drilling pilot and shank holes,
start the screw slowly and increase the speed as
driving progresses. Set the screw by slowing to a
stop. Do not run screws down at excessive speeds.
To remove screws, reverse the motor.
5
To reduce the risk of explo-