Milwaukee Tool 0302-20 V.2 - Manual (Page 5)

8 9
APPLICATIONS
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.
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.
Bit Binding
A high rotational force occurs when a bit binds. If
the bit binds, the tool will be forced in the opposite
direction of the bit rotation (See Fig. 11 - 13). Bits
may bind if they are misaligned or when they are
breaking through a hole. Wood boring bits can also
bind if they run into nails or knots. Be prepared for
bit binding situations.
WARNING High rotational force. To
reduce the risk of injury, always hold or brace
securely. Always use side handle on tools
rated 1200 RPM or less.
Typical Bracing Methods
Fig. 12
Forward
rotation
Bracing
against
your leg
Reaction
Fig. 11 Forward rotation
Bracing against the fl oor
Reaction
CAPACITIES
Wood Steel Masonry
Cat. No.
Flat Boring
Bits
Auger
Bits
Ship Auger Bits
Selfeed
Bits
Hole
Saws
Twist
Drill
Hole
Saws
Carbide-
Tipped Bits
0233-20 1” N/R N/R N/R 1-3/4” 3/8” 1” 3/8”
0234-6
RAD low
RAD high
1-1/2”
1-1/2”
1-1/2” 1-1/2”
1-1/2”
1-1/8” 1-1/4”
1-1/2”
1”
2”
2-1/4”
1-1/2”
4”
4-1/2”
2-3/4”
1/2”
1/2”
1/2” 2”
2-1/8”
1-1/2”
1/2”
9/16”
7/16”
0235-21 1-1/2” 1-1/2” 1-1/4” 2” 4” 1/2” 2” 1/2”
0244-1
RAD low
RAD high
1-1/2”
1-1/2”
1-1/2” 1-1/2”
1-1/2”
1-1/2” 1-1/2”
1-1/2”
1-1/4” 2-1/4”
2-9/16”
1-3/4”
4-1/2”
5”
3-1/4”
1/2”
1/2”
1/2” 2-1/4”
2-1/4”
1-3/4” 9/16”
5/8”
1/2”
Bracing against
a stud
Reverse rotation Forward rotation
Bracin
a
R i
Reaction Reaction
Fig. 13 gainst
d
Reaction on on
To reduce the chance of bit binding:
• Use sharp bits. Sharp bits are less likely to bind
when drilling.
• Use the proper bit for the job. There are bits that
are designed for specifi c purposes.
• Use caution when drilling pitchy, knotty, wet or
warped material or when drilling in material that
may contain nails.
Maintaining Tools
Keep your tool in good repair by adopting a regular
maintenance program. Before use, examine the
general condition of your tool. Inspect guards,
switches, tool cord set and extension cord for
damage. Check for loose screws, misalignment,
binding of moving parts, improper mounting, bro-
ken parts and any other condition that may affect
its safe operation. If abnormal noise or vibration
occurs, turn the tool off immediately and have the
problem corrected before further use. Do not use a
damaged tool. Tag damaged tools “DO NOT USE”
until repaired (see “Repairs”).
Under normal conditions, relubrication is not neces-
sary until the motor brushes need to be replaced.
After six months to one year, depending on use,
return your tool to the nearest MILWAUKEE service
facility for the following:
• Lubrication
• Brush inspection and replacement
• Mechanical inspection and cleaning (gears, spin-
dles, bearings, housing, etc.)
• Electrical inspection (switch, cord, armature, etc.)
• Testing to assure proper mechanical and electrical
operation
WARNING To reduce the risk of injury,
electric shock and damage to the tool, never
immerse your tool in liquid or allow a liquid
to fl ow inside the tool.
MAINTENANCE
WARNING To reduce the risk of injury,
always unplug your tool before performing
any maintenance. Never disassemble the tool
or try to do any rewiring on the tool’s electrical
system. Contact a MILWAUKEE service facility
for ALL repairs.
Replacing Brushes
MILWAUKEE Magnum Drills have an exclusive
Brush Cartridge System. The tool will not start when
the brushes are worn to 1/8", preventing expensive
damage to the armature. New brushes are provided
in the Cartridge for fast changes anywhere.
1. Unplug tool and rest it on its side with the car-
tridge facing up. Loosen the brush holder screw
in the cartridge and pull cartridge out.
2. Remove worn brushes. If the brushes should fall
into the tool, be sure to shake them out before
reinserting the cartridge. Discard BOTH brushes.
Brushes should always be replaced in sets.
3. A set of spare brushes is provided in the car-
tridge. Remove the brushes from storage com-
partment.
4. Position new brushes with the fl at silver end fac-
ing into the brush holder. Push cartridge into the
tool and press evenly on top and bottom of the
cartridge to align terminals for proper connection.
5. Tighten the brush holder screw gently. If the head
of screw is damaged, use only MILWAUKEE
replacement parts.
Fig. 15
Brush
holder
screw
Brushes
Extra
brushes
Brush holder Fig. 14
WARNING Never use a different screw
as a brush holder screw.
ACCESSORIES
For a complete listing of accessories refer to your
MILWAUKEE Electric Tool catalog or go on-line
to www.milwaukeetool.com. To obtain a catalog,
contact your local distributor or a service center.
WARNING To reduce the risk of injury,
always unplug the tool before attaching or
removing accessories. Use only specifi cally
recommended accessories. Others may be
hazardous.
Cleaning
Clean dust and debris from vents. Keep the tool
handles clean, dry and free of oil or grease. Use
only mild soap and a damp cloth to clean your
tool since certain cleaning agents and solvents
are harmful to plastics and other insulated parts.
Some of these include: gasoline, turpentine, lacquer
thinner, paint thinner, chlorinated cleaning solvents,
ammonia and household detergents containing
ammonia. Never use fl ammable or combustible
solvents around tools.
Repairs
If your tool is damaged, return the entire tool to the
nearest service center.