Milwaukee 5391-1, 5392-1 Operator's Manual
OPERATOR'S MANUAL
MANUEL de L'UTILISATEUR
MANUAL del OPERADOR
Catalog No.
No de Cat.
Catálogo No.
5391-1
5392-1
HEAVY-DUTY 3/8" HAMMER-DRILLS
EXTRA ROBUSTE PERCEUSES À PERCUSSION 9,5 mm (3/8")
HEAVY-DUTY 9,5 mm 3/8" TALADRO-MARTILLO
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.
GENERAL SAFETY RULES
WARNING!
READ AND UNDERSTAND ALL INSTRUCTIONS.
Failure to follow all instructions listed below, may result in
electric shock, fire and/or serious personal injury.
SAVE THESE INSTRUCTIONS.
WORK AREA
1. Keep your work area clean and well lit. Cluttered benches and
dark areas invite accidents.
2. Do not operate power tools in explosive atmospheres, such
as in the presence of flammable liquids, gases, or dust.
Power tools create sparks which may ignite the dust or fumes.
3. Keep bystanders, children, and visitors away while operat-
ing a power tool. Distractions can cause you to lose control.
Protect others in the work area from debris such as chips and
sparks. Provide barriers or shields as needed.
ELECTRICAL SAFETY
4. Grounded tools must be plugged into an outlet properly
installed and grounded in accordance with all codes and
ordinances. Never remove the grounding prong or modify
the plug in any way. Do not use any adaptor plugs. Check
with a qualified electrician if you are in doubt as to whether
the outlet is properly grounded. If the tools should electrically
malfunction or break down, grounding provides a low resistance
path to carry electricity away from the user.
5. Double Insulated tools are equipped with a polarized plug
(one blade is wider than the other). This plug will fit in a
polarized outlet only one way. If the plug does not fit fully in
the outlet, reverse the plug. If it still does not fit, contact a
qualified electrician to install a polarized outlet. Do not change
the plug in any way. Double insulation eliminates the need for
the three wire grounded power cord and grounded power supply
system.
6. Avoid body contact with grounded surfaces such as pipes,
radiators, ranges and refrigerators. There is an increased risk
of electric shock if your body is grounded.
7. Do not expose power tools to rain or wet conditions. Water
entering a power tool will increase the risk of electric shock.
8. Do not abuse the cord. Never use the cord to carry the tools
or pull the plug from an outlet. Keep cord away from heat,
oil, sharp edges or moving parts. Replace damaged cords
immediately. Damaged cords increase the risk of electric shock.
9. When operating a power tool outside, use an outdoor
extension cord marked W-A or W. These cords are rated
for outdoor use and reduce the risk of electric shock.
PERSONAL SAFETY
10. Stay alert, watch what you are doing, and use common sense
when operating a power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or medication. A
moment of inattention while operating power tools may result in
serious personal injury.
11. Dress properly. Do not wear loose clothing or jewelry.
Contain long hair. Keep your hair, clothing, and gloves away
from moving parts. Loose clothes, jewelry, or long hair can be
caught in moving parts.
12. Avoid accidental starting. Be sure switch is off before
plugging in. Carrying tools with your finger on the switch or
plugging in tools with the switch on invites accidents.
13. Remove adjusting keys or wrenches before turning on the
tool. A wrench or a key that is left attached to a rotating part of the
tool may result in personal injury.
14. Do not overreach. Keep proper footing and balance at all
times. Proper footing and balance enables better control of the tool
in unexpected situations.
15. Use safety equipment. Always wear eye protection. Dust
mask, non-skid safety shoes, hard hat, or hearing protection must
be used for appropriate conditions.
TOOL USE AND CARE
16. Use clamps or other practical way to secure and support
the workpiece to a stable platform. Holding the work by hand
or against your body is unstable and may lead to loss of control.
17. Do not force tool. Use the correct tool for your application.
The correct tool will do the job better and safer at the rate for which
it is designed.
18. Do not use tool if switch does not turn it on or off. Any tool
that cannot be controlled with the switch is dangerous and must be
repaired.
19. Disconnect the plug from the power source before making
any adjustments, changing accessories, or storing the tool.
Such preventive safety measures reduce the risk of starting the tool
accidentally.
20. Store idle tools out of reach of children and other untrained
persons. Tools are dangerous in the hands of untrained users.
21. Maintain tools with care. Keep cutting tools sharp and clean.
Properly maintained tools with sharp cutting edge are less likely to
bind and are easier to control. Do not use a damaged tool. Tag
damaged tools Do not use until repaired.
22. Check for misalignment or binding of moving parts, break-
age of parts, and any other condition that may affect the
tools operation. If damaged, have the tool serviced before
using. Many accidents are caused by poorly maintained tools.
23. Use only accessories that are recommended by the manufacturer for your model. Accessories that may be suitable for
one tool, may become hazardous when used on another tool.
SERVICE
24. Tool service must be performed only by qualified repair
personnel. Service or maintenance performed by unqualified per-
sonnel could result in a risk of injury.
25. When servicing a tool, use only identical replacement parts.
Follow instructions in the Maintenance section of this
manual. Use of unauthorized parts or failure to follow Maintenance
Instructions may create a risk of electric shock or injury.
page 2
SPECIFIC SAFETY RULES HAMMERS
1. 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.
2. Wear ear protectors when using the tool for extended periods. Prolonged exposure to high intensity noise can cause hearing loss.
3. Keep hands away from all cutting edges and moving parts.
4. Maintain labels and nameplates. These carry important information. If unreadable or missing, contact a MILWAUKEE service facility for a free
replacement.
5. WARNING! Some dust created by power sanding, sawing, grinding, drilling, and other construction 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 filter out microscopic
particles.
Cat.
Volts
No.
AC
5391-1
5392-1
1. Chuck
2. Hammer-drill selector collar
3. Nameplate
4. Forward/reverse switch
5. Cord
6. Trigger lock
7. Trigger
8. Side handle
9. Depth gauge
10. Dust shield
120
120
Watts
550
550
No Load
RPM
0 - 2,500
0 - 2,500
Specifications
In Steel
Blows per
Minute
0 - 50,000
0 - 50,000
10
Twist Drill
1
9
Capacities
In
In Concrete or
Masonry
Bits
Screw
Fasten-
ers
3/16"
3/16"
Carbide
Tipped
9/16"
9/16"
Bits
3/8"
3/8"
Wood
Flat
Boring
Bits
3/4"
3/4"
FUNCTIONAL DESCRIPTION
2
Symbology
Volts Alternating Current
No Load Revolutions per
Minute (RPM)
Underwriters Laboratories, Inc.
Canadian Standards Association
3
4
8
7
6
5
page 3
GROUNDING EXTENSION CORDS
WARNING!
Improperly connecting the grounding wire can
result in the risk of electric shock. Check with a
qualified 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 fit
the outlet, have a proper outlet installed by a
qualified 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.
Fig. A
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 suffix 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 qualified person before using it.
Protect your extension cords from sharp objects, excessive heat
and damp or wet areas.
Recommended Minimum Wire Gauge
Nameplate
Amperes
8.1 - 12
12.1 - 15
15.1 - 20
for Extension Cords*
25'
0 - 5
5.1 - 8
16
16
14
12
10
Extension Cord Length
100'
14
12
10
10
150'
12
10
--
--
--
--
50'
16
16
14
12
10
75'
16
14
12
10
10
200'
12
--
--
--
--
Double Insulated Tools:
Tools with Two Prong Plugs
Tools marked Double Insulated do
not require grounding. They have a
special double insulation system
which satisfies 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.
Fig. B
* Based on limiting the line voltage drop to five
volts at 150% of the rated amperes.
READ AND SAVE ALL INSTRUCTIONS
FOR FUTURE USE.
Fig. C
page 4
TOOL ASSEMBLY
WARNING!
To reduce the risk of injury, always unplug
tool before attaching or removing accessories
or making adjustments. Use only specifically
recommended accessories. Others may be
hazardous.
®
Removing and Replacing Quik-Lok
MILWAUKEE's exclusive Quik-Lok
Cords (Fig. 1) (Cat. No. 5391-1)
®
Cords provide instant field replace-
ment or substitution.
OPERATION
WARNING!
To reduce the risk of injury, wear safety goggles
or glasses with side shields. Unplug the tool
before changing accessories or making adjustments.
Starting, Stopping and Controlling Speed
1. To start the tool, pull the trigger.
2. To vary the driving speed, simply increase or decrease pressure on
the trigger. The further the trigger is pulled, the greater the speed.
3. To stop the tool, release the trigger.
Fig. 1
1. To remove the Quik-Lok® Cord, turn the cord nut 1/4 turn to the left
and pull it out.
®
2. To replace the Quik-Lok
Cord, align the connector keyways and
push the connector in as far as it will go. Turn the cord nut 1/4 turn
to the right to lock.
Using Forward/Reverse Switch (Fig. 3)
Fig. 3
Reverse
Forward
Locking Trigger (Fig. 2.)
The lock button holds the trigger in the ON position for continuous full
speed use.
Fig. 2
Reversing Switch
Lever
Lock button
Trigger Speed
Control Switch
1. To lock the trigger, hold the lock button in while pulling the trigger.
Then release the trigger.
2. To unlock the trigger, pull the trigger and release. The lock button will
pop out.
1. For forward (clockwise) rotation, push the forward/reverse switch
to the right.
2. For reverse (counterclockwise) rotation, push the forward/reverse
switch to the left. Although an interlock prevents reversing the tool
while the motor is running, allow the tool to stop completely before
reversing.
page 5
Using the Shift Mechanism (Fig. 4)
MILWAUKEE Hammer-Drills are designed for two operating modes: drilling with hammering action and drilling only.
Fig. 4
Installing Bits Into Keyed Chucks (Fig. 5)
MILWAUKEE Hammer-Drills are equipped with an industrial, key-type
geared chuck.
Fig. 5
Tighten
Loosen
1. To use the hammer-drilling mode, rotate the knurled shift collar until
the hammer symbol appears at the top center of the collar. Apply
pressure to the bit to engage the hammering mechanism.
2. To use the drilling only mode, rotate the knurled shift collar until the
drill symbol appears at the top center of the collar.
Auxiliary Side Handle and Depth Gauge
A side handle is furnished to provide maximum control of the tool. It may
be threaded into either side of the gear case where it serves to lock the
depth gauge in position by clamping the rod between the handle flange
and the groove in the gear case. To change the setting, loosen the
handle slightly, reposition the rod and retighten the handle.
APPLICATIONS
WARNING!
To reduce the risk of injury, always unplug tool
before attaching or removing accessories. Use
only specifically recommended accessories.
Others may be hazardous.
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 flutes.
Use low speeds for plastics with a low melting point.
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 properly.
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. Then, 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 counterclockwise as shown. Tighten securely.
Dust Shield
A dust shield is provided to keep abrasive dust out of the mechanism and
to prevent grease contamination. Always operate the Hammer-Drill with
the dust shield in place.
Drilling in Masonry
When drilling masonry, use high speed carbide-tipped bits at low speeds.
Drilling soft masonry materials such as cinder block requires little pressure. Hard materials like concrete require more pressure. A smooth,
even flow of dust indicates the proper drilling rate. Do not let the bit spin
in the hole without cutting, since this will damage the bit. Do not use
water to settle dust or to cool bit. This will damage the carbide and create
a shock hazard.
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.
page 6
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