Milwaukee 5381-20, 5387-20 Operator's Manual

TO REDUCE THE RISK OF INJURY, USER MUST READ AND UNDERSTAND OPERATOR'S
MANUAL.

AFIN DE RÉDUIRE LE RISQUE DE BLESSURES, L'UTILISATEUR DOIT LIRE ET BIEN
COMPRENDRE LE MANUEL DE L'UTILISATEUR.

PARA REDUCIR EL RIESGO DE LESIONES, EL USUARIO DEBE LEER Y ENTENDER EL
MANUAL DEL OPERADOR.

OPERATOR'S MANUAL
MANUEL de L'UTILISATEUR
MANUAL del OPERADOR

Cat. No.

No de cat.

5381-20
5387-20

1/2" HAMMER-DRILL
PERCEUSES À PERCUSSION 13 mm (1/2")
13 mm (1/2") TALADRO-MARTILLO

2

3

PERSONAL SAFETY

GENERAL POWER TOOL SAFETY WARNINGS

WORK AREA SAFETY

ELECTRICAL SAFETY

WARNING READ ALL SAFETY WARNINGS AND ALL INSTRUCTIONS. Failure

to follow the warnings and instructions may result in electric shock, fi re and/or serious
injury. Save all warnings and instructions for future reference. The term "power
tool" in the warnings refers to your mains-operated (corded) power tool or battery-operated
(cordless) power tool.

POWER TOOL USE AND CARE

SERVICE

SPECIFIC SAFETY RULES

• Power tool plugs must match the outlet. Never

modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) power
tools. Unmodifi ed plugs and matching outlets will

reduce risk of electric shock.

• Avoid body contact with earthed or grounded

surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric

shock if your body is earthed or grounded.

• Do not expose power tools to rain or wet con-
ditions. Water entering a power tool will increase
the risk of electric shock.

• Do not abuse the cord. Never use the cord for

carrying, pulling, or unplugging the power tool.
Keep cord away from heat, oil, sharp edges,
or moving parts. Damaged or entangled cords

increase the risk of electric shock.

• When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of
a cord suitable for outdoor use reduces the risk of
electric shock.

• Do not force the power tool. Use the correct
power tool for your application. The correct
power tool will do the job better and safer at the
rate for which it was designed.

• Do not use the power tool if the switch does not
turn it on and off. An power tool that cannot be
controlled with the switch is dangerous and must
be repaired.

• Disconnect the plug from the power source

and/or the battery pack from the power tool
before making any adjustments, changing
accessories, or storing power tools. Such pre-

ventive safety measures reduce the risk of starting
the tool accidentally.

• Store idle power tools out of the reach of

children and do not allow persons unfamiliar
with the power tools or these instructions to
operate power tools. Power tools are dangerous

in the hands of untrained users.

• Maintain power tools. Check for misalignment

or binding of moving parts, breakage of parts
and any other condition that may affect the
power tool's operation. If damaged, have the
power tool repaired before use. Many accidents

are caused by poorly maintained power tools.

• Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.

• Use the power tool, accessories and tool bits

etc., in accordance with these instructions and
in the manner intended for the particular type
of power tool, taking into account the working
conditions and the work to be performed. Use

of the power tool for operations different from those
intended could result in a hazardous situation.

• Have your power tool serviced by a qualifi ed

repair person using only identical replacement
parts. This will ensure that the safety of the power

tool is maintained.

• Keep work area clean and well lit. Cluttered or
dark areas invite accidents.

• Do not operate power tools in explosive atmo-

spheres, such as in the presence of fl ammable
liquids, gases, or dust. Power tools create sparks

which may ignite the dust or fumes.

• Keep children and bystanders away while
operating a power tool. Distractions can cause
you to lose control.

• Stay alert, watch what you are doing and use

common sense when operating a power tool.
Do not use a power tool while you are tired or
under the infl uence of drugs, alcohol or medi-
cation. A moment of inattention while operating

power tools may result in serious personal injury.

• Use safety equipment. Always wear eye pro-
tection. Safety equipment such as dust mask,
non-skid safety shoes, hard hat, or hearing pro­tection used for appropriate conditions will reduce
personal injuries.

• Avoid accidental starting. Ensure the switch is
in the off-position before plugging in. Carrying
tools with your fi nger on the switch or plugging
in power tools that have the switch on invites ac­cidents.

• Remove any adjusting key or wrench before
turning the power tool on. A wrench or a key left
attached to a rotating part of the power tool may
result in personal injury.

• Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.

• Maintain labels and nameplates. These carry
important information. If unreadable or missing,
contact a MILWAUKEE service facility for a free
replacement.

• WARNING! Some dust created by power sanding,
sawing, grinding, drilling, and other construction

• Dress properly. Do not wear loose clothing or

jewellery. Keep your hair, clothing and gloves
away from moving parts. Loose clothes, jewel-

lery, or long hair can be caught in moving parts.

• If devices are provided for the connection of

dust extraction and collection facilities, ensure
these are connected and properly used. Use of

these devices can reduce dust-related hazards.

SPECIFICATIONS

Capacities

Tool

Drill Only

(steel/wood)

Rotary Hammer

(concrete)

Cat. No.

Volts

AC

Amps

No Load

RPM

No Load Blows

per Minute

Twist Drill Bit

Carbide Tipped

Percussion Bit

5387-20
5381-20

120
120

8.5

8.5

Low 0 - 1000

High 0 - 2500

0 - 1800

16,000
40,000
28,000

1/2" / 1"

3/8" / 3/4"

3/4"
5/8"

SYMBOLOGY

Double Insulated

Amperes

Volts

Alternating Current

No Load Revolutions
per Minute (RPM)

BPM

Blows per Minute (BPM)

Underwriters Laboratories, Inc.
United States and Canada

Mexican Approvals Marking

activities contains chemicals known to cause
cancer, birth defects or other reproductive harm.
Some examples of these chemicals are:

• lead from lead-based paint

• crystalline silica from bricks and cement and other
masonry products, and

• arsenic and chromium from chemically-treated
lumber.

Your risk from these exposures varies, depending

on how often you do this type of work. To reduce
your exposure to these chemicals: work in a well
ventilated area, and work with approved safety
equipment, such as those dust masks that are
specially designed to fi lter out microscopic par-
ticles.

• Hold tool by insulated gripping surfaces when

performing an operation where the cutting tool
may contact hidden wiring or its own cord.

Contact with a “live” wire will make exposed metal
parts of the tool “live” and shock the operator.

• Keep hands away from all cutting edges and

moving parts.

• Wear ear protectors with impact drill. Exposure
to noise can cause hearing loss.

• Use auxiliary handles supplied with the tool.
Loss of control can cause personal injury.

FUNCTIONAL DESCRIPTION

1. Side handle

2. Clamping lever

3. Depth guage

4. Hammer/Drill lever

5. Variable speed trigger

6. Forward/Reverse lever

7. Speed/Torque selector(Cat. No. 5387-20 only)

8. Chuck

9. Quik-Lok® cord (Cat. No. 5387-20 only)

Cat. No. 5387-20

9

7 6 5

8

3

4

1

2

4

5

Fig. B

Fig. C

Fig. A

GROUNDING

WARNING Improperly connecting the

grounding wire can result in the risk of elec­tric shock. Check with a qualifi ed electrician
if you are in doubt as to whether the outlet is
properly grounded. Do not modify the plug
provided with the tool. Never remove the
grounding prong from the plug. Do not use
the tool if the cord or plug is damaged. If
damaged, have it repaired by a MILWAUKEE
service facility before use. If the plug will not
fi t the outlet, have a proper outlet installed by
a qualifi ed electrician.

Grounded Tools: Tools with Three Prong Plugs

Tools marked “Grounding Required” have a three
wire cord and three prong grounding plug. The
plug must be connected to a properly grounded
outlet (See Figure A). If the tool should electrically
malfunction or break down, grounding provides a
low resistance path to carry electricity away from
the user, reducing the risk of electric shock.
The grounding prong in the plug is connected
through the green wire inside the cord to the
grounding system in the tool. The green wire in the
cord must be the only wire connected to the tool's
grounding system and must never be attached to
an electrically “live” terminal.
Your tool must be plugged into
an appropriate outlet, properly
installed and grounded in accord­ance with all codes and ordinances.
The plug and outlet should look like
those in Figure A.

Double Insulated Tools:
Tools with Two Prong Plugs

Tools marked “Double Insulated” do not require
grounding. They have a special double insula­tion system which satisfi es OSHA requirements
and complies with the applicable standards of
Underwriters Laboratories, Inc.,
the Canadian Standard Asso­ciation and the National Elec­trical Code. Double Insulated
tools may be used in either of
the 120 volt outlets shown in
Figures B and C.

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
Canada) to indicate that it is acceptable for outdoor
use.

• 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.

READ AND SAVE ALL

INSTRUCTIONS FOR FUTURE USE.

* Based on limiting the line voltage drop to fi ve volts at

150% of the rated amperes.

EXTENSION CORDS

Recommended Minimum Wire Gauge

For Extension Cords*

Extension Cord Length

Nameplate

Amperes

25' 50' 75' 100' 150'

0 - 2.0

2.1 - 3.4

3.5 - 5.0

5.1 - 7.0

7.1 - 12.0

12.1 - 16.0

16.1 - 20.0

18
18
18
18
16
14
12

18
18
18
16
14
12
10

18
18
16
14
12
10

--

18
16
14
12
10

--

--

16
14
12
12

--

--

--

ASSEMBLY

WARNING To reduce the risk of injury,

always unplug tool before attaching or remov­ing accessories or making adjustments. Use
only specifi cally recommended accessories.
Others may be hazardous.

Removing and Replacing Quik-Lok® Cords (Fig.

1) (Cat. No. 5387-20)

MILWAUKEE's exclusive Quik-Lok® Cords provide
instant fi eld replacement or substitution.

Fig. 1

1. To remove the Quik-Lok® Cord, turn the cord nut

1/4 turn to the left and pull it out.

2. T o replace the Quik-Lok® Cord, align the connec-

tor keyways and push the connector in as far as it
will go. Turn the cord nut 1/4 turn to the right to lock.

Installing Bits into Keyed Chucks (Fig. 2)

Be sure that the shank of the bit and the chuck jaws
are clean. Dirt par­ticles may cause the bit
to line up improperly.
Do not use bits larger
than the maximum rec­ommended capacity of
the drill because gear
damage or motor over­loading may result.
For best performance,
be sure that the bits are
properly sharpened
before use.

1. Unplug the tool.

2. Open the chuck jaws wide enough to insert a bit.
Allow the bit to strike the bottom of the chuck.
Center the bit in the chuck jaws and tighten the
jaws by hand to align the bit.

3. Place the chuck key into each of the three holes
in the chuck, turning it clockwise to tighten the
chuck securely.

NOTE: Never use a wrench or means other than

a chuck key to tighten or loosen the chuck.

4. T o remove the bit, insert the chuck key into one of
the holes in the chuck and turn it counterclockwise.

Fig. 2

Loosen

Tighten

Adjusting the Side Handle Position (Fig. 3)

1. Loosen the side handle by unscrewing the side
handle grip until the side handle rotates freely.

2. Rotate the side handle to the desired position.

3. Tighten the side handle grip securely.

WARNING To prevent personal injury,

always remove the chuck key from the chuck
after each use.

WARNING To reduce the risk of injury,

always use a side handle when using this tool.
Always brace or hold securely.

Fig. 3

Clamping lever

Side handle

grip

2. Slide the depth gauge rod backward or forward
until it is set for the desired depth (Fig. 4).

NOTE: The drilling depth is the distance between

the tip of the bit and the tip of the depth gauge
rod.

3. Release the clamping lever.

Setting the Depth Gauge (Fig. 4)

1. Press in the clamping lever (Fig. 3).

Chuck Removal (Fig. 5)

This tool is equipped with a threaded spindle to hold
the chuck. Before removing the chuck, unplug the
tool and open the chuck jaws. A left-handed thread
screw is located inside the chuck to prevent the
chuck from loosening when the tool is operated
in reverse direction. Remove the screw by turning
it clockwise. To remove the chuck, hold the tool
so that only the side of the chuck rests fi rmly and
squarely on a solid workbench. Insert the chuck
key or a chuck re­mover bar in one
of the keyholes.
Turn the chuck
so the key is at
about a 30° angle
to the bench top
and strike the
key sharply with
a hammer so the
chuck turns in a
counterclockwise
direction (look­ing from the front
of the tool). This
should loosen the
chuck from the
spindle which has
a right hand thread making it easy to remove the
chuck by hand.
NOTE: When replacing the chuck, always replace
the left hand thread screw in the chuck.

Fig. 4

Drilling Depth

WARNING To reduce the risk of injury,

always wear eye protection.

Fig. 5

6

7

ACCESSORIES

WARNING T o reduce the risk of injury,

always unplug the tool before attaching or
removing accessories. Use only specifi cally
recommended accessories. Others may be
hazardous.

WARNING T o 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 T o 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.

OPERATION

Selecting Action

MILWAUKEE Hammer-Drills have two settings:
drilling and hammer-drilling.

1. For drilling, turn the hammer-drill lever to the
drill symbol.

2. For hammer-drilling, turn the hammer-drill lever
to the hammer symbol.

NOTE: To engage the hammering mechanism,

maintain pressure on the bit. When pressure
on the bit is released, the hammering action will
stop.

Using Forward/Reverse Lever (Fig. 6)

The forward/reverse
lever can only be ad­justed when the trigger
is not pressed. Always
allow the motor to come
to a complete stop be­fore using the forward/
reverse lever.

1. For forward (clock­wise) rotation, push
the forward/reverse
lever to the left (when
viewed from the back
of the tool) as shown.

2. For reverse (counterclockwise) rotation, push
the forward/reverse lever to the right (when
viewed from the back of the tool) as shown. Allow
the motor to come to a full stop before reversing.

NOTE: When hammer-drilling, use the tool in for­ward rotation (clockwise) only.

Selecting Speed (Cat. No. 5387-20 only)

The speed can only be changed when the tool is
at a complete stop.

1. For high torque/low speed (up to 1000 rpm),
turn the speed selector to position 1.

2. For low torque/high speed (up to 2500 rpm),
turn the speed selector to position 2.

Starting, Stopping & Controlling Speed

1. To start the tool, pull trigger.

2. To stop the tool, release trigger.

3. To vary the speed, increase or decrease pres­sure to trigger. The further the trigger is pulled,
the greater the speed.

Operating

Position the tool, grasp the handles fi rmly and pull
the trigger. Always hold or brace the tool securely
using both handles and maintain control. This tool
has been designed to achieve top performance with
only moderate pressure. Let the tool do the work.
If the speed begins to drop off when drilling deep
holes, pull the bit partially out of the hole while the
tool is running to help clear dust. Do not use water
to settle the dust since it will clog the bit fl utes and
tend to make the bit bind in the hole.

WARNING T o reduce the risk of injury ,

wear safety goggles or glasses with side
shields. Unplug the tool before changing
accessories or making adjustments.

Fig. 6

Forward

Reverse

APPLICATIONS

Drilling in Wood, Composition Materials and
Plastic

When drilling in wood, composition materials and
plastic, select the drill operating mode. Start the drill
slowly, gradually increasing speed as you drill. Se­lect low speeds for plastics with a low melting point.

Drilling in Metal

When drilling in metal, select the drill operating
mode. Use high speed steel twist drills or hole saws.
Use a center punch to start the hole. 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.

Drilling in Masonry

When drilling in masonry, select the hammer-drill
operating mode. 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. Do not
attempt to drill through steel reinforcing rods. Both
actions will damage the carbide.

WARNING T o reduce the risk of electric

shock, check work area for hidden pipes and
wires before drilling.

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, broken 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 neces­sary 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,
spindles, bearings, housing, etc.)

• Electrical inspection (switch, cord, armature, etc.)

• Testing to assure proper mechanical and electrical
operation

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.

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.

Side Handle

Cat. No. 49-15-5300

Depth Gauge

Cat. No. 48-66-5185