Milwaukee 5371-20, 5370-1, 5376-1, 5374-1 User Manual

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

Catalog No.

No de Cat.

Catálogo No.

5370-1

5371-20

5374-1 5376-1

HEAVY-DUTY 1/2" REVERSING HAMMER-DRILL EXTRA ROBUSTE PERCEUSES À PERCUSSION 13 mm (1/2") ROTATION

RÉVERSIBLE TALADRO-MARTILLOS HEAVY-DUTY 13 mm (1/2") DE REVERSIBLES

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  FOR ALL POWER TOOLS

WARNING!

Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury. The term "power tool" in all of the warnings listed below refers to your mains-operated (corded) power tool or battery-opearted (cordless) power tool.

SAVE THESE INSTRUCTIONS

READ ALL INSTRUCTIONS

WORK AREA SAFETY

1. Keep work area clean and well lit. Cluttered or 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 children and bystanders away while operating a power

tool. Distractions can cause you to lose control.

ELECTRICAL SAFETY

4. 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. Unmodified plugs and matching outlets

will reduce risk of electric shock.

5. 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.

6. Do not expose power tools to rain or wet conditions. Water

entering a power tool will increase the risk of electric shock.

7. 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.

8. 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.

PERSONAL SAFETY

16. 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.

17. Do not use the power tool if the switch does not turn it on

and off. Any power tool that cannot be controlled with the switch is

dangerous and must be repaired.

18. Disconnect the plug from the power source and/or the bat-

tery pack from the power tool before making any adjust-

ments, changing accessories, or storing power tools. Such

preventive safety measures reduce the risk of starting the tool acci-

dentally.

19. 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 danger-

ous in the hands of untrained users.

20. 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.

21. Keep cutting tools sharp and clean. Properly maintained cutting

tools with sharp cutting edges are less likely to bind and are easier

to control.

22. Use the power tool, accessories and tool bits etc., in accor-

dance 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.

POWER TOOL USE AND CARE

SERVICE

9. 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 influence of drugs, alcohol or

medication. A moment of inattention while operating power tools

may result in serious personal injury.

10. Use safety equipment. Always wear eye protection. Safety

equipment such as dust mask, non-skid safety shoes, hard hat, or

hearing protection used for appropriate conditions will reduce per-

sonal injuries.

11. Avoid accidental starting. Ensure the switch is in the off-

position before plugging in. Carrying tools with your finger on

the switch or plugging in power tools that have the switch on invites

accidents.

12. 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.

13. Do not overreach. Keep proper footing and balance at all

times. This enables better control of the power tool in unexpected

situations.

14. Dress properly. Do not wear loose clothing or jewellery.

Keep your hair, clothing and gloves away from moving parts.

Loose clothes, jewellery, or long hair can be caught in moving parts.

15. If devices are provided for the connection of dust extrac-

tion and collection facilities, ensure these are connected

and properly used. Use of these devices can reduce dust-re-

lated hazards.

page 2

23. Have your power tool serviced by a qualified repair person

using only identical replacement parts. This will ensure that

the safety of the power tool is maintained.

SPECIFIC SAFETY RULES

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

2. Wear ear protectors with impact drills. Exposure to noise can cause hearing loss.

3. Hold power tools 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.

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 specifically designed to filter out

microscopic particles.

Symbology

Underwriters

Laboratories, Inc. Canadian Standards

Association Mexican Approvals Marking

Specifications

Wood Steel Concrete

Cat.

Speed

No.

5370-1

5371-20

5376-1 5374-1

control

* Set gear shift to low speed se tting when boring holes in wood.

Nr = Not recommended

low

high

speed

No Load

RPM

0 - 1 000 0 - 2 500

0 - 2 500

Blows

per

minute

0 - 20 000 0 - 50 000

0 - 50 000

Flat

boring

bit

1-1/2"

3/4" 3/4"

Auger

bit

7/8"

auger bit

FUNCTIONAL DESCRIPTION

Ship

7/8"

Selfeed

bit

1-1/8"

Volts Alternating Current

No Load Revolutions

per Minute (RPM)

Amperes

Hole saw

3-1/4"

1-3/4"

Twist

Carbide

drill

1/2" 3/8"

3/8"

tipped

bit

5/8"

9/16" 9/16"

Screw

fasteners

1/4"

3/16"

1. Depth rod

2. Side handle

3. Nameplate

4. Trigger

5. Cord

6. Lock button

7. Forward/Reverse switch

8. Gear shift (Cat Nos. 5370-1, 5376-1 & 5371-20 only)

9. Collar hex

10. Handle ring

11. Hammer-drill selector collar

12. Keyed chuck (Keyless chuck on Cat No.5376-1)

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 re-

sistance 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 satisfies OSHA requirements

and complies with the applicable

standards of Underwriters Labora-

tories, Inc., the Canadian Standard

Association and the National Electri-

cal Code. Double Insulated tools may

be used in either of the 120 volt out-

lets shown in Figures B and C.

Fig. A

Fig. B

Fig. 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 exten-

sion 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 mini-

mum 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

* Based on limiting the line voltage drop to five

volts at 150% of the rated amperes.

for Extension Cords*

25'

0 - 5

5.1 - 8

Extension Cord Length

100'

150'

50'

75' 16

200'

READ AND SAVE ALL INSTRUCTIONS

FOR FUTURE USE.

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® Cords (Fig. 1)

MILWAUKEE's exclusive Quik-Lok® Cords provide instant field replace-

ment 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. 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.

Attaching the Side Handle

MILWAUKEE Magnum Hammer-Drills are furnished with a side handle to

provide an insulated grasping surface and improved control of the tool.

A handle ring, which fits behind the hammer/drill selector collar, locks the

handle and depth rod in place. To change the setting of the depth rod,

loosen the handle slightly and slide the depth rod to the desired position.

Always tighten the side handle before operation. Be sure the handle ring

is flat against the collar hex and away from the chuck and selector collar.

When using large bits or exerting substantial pressure, position the side

handle 180° from the switch handle. This provides a "T" alignment to

balance the tipping effect of the force applied to each handle.

Setting the Depth Gauge (Fig. 3)

Fig. 3

1. Loosen the depth gauge by unscrewing the side handle grip slightly.

2. Slide the depth gauge rod backward or forward until it is set for the

desired depth.

NOTE: The drilling depth is the distance between the tip of the bit and

the tip of the depth gauge rod.

3. Hold the side handle in the desired position and flat against the collar

hex while tightening the handle grip securely.

Drilling Depth

WARNING!

To reduce the risk of personal injury and damage to the tool, hold and brace the tool securely. Brace tools with side handles as shown. If the bit binds, the tool will be forced in the opposite direction. Bits may bind if they are misaligned or when breaking through a hole. Wood boring bits can also bind if they run into nails or knots.

Adjusting the Side Handle Position (Fig. 2)

Fig. 2

1. Loosen the side handle by unscrewing the handle grip slightly.

2. Rotate the side handle to the desired position.

3. Hold the side handle in the desired position and flat against the collar

hex while tightening the handle grip securely.

page 5

WARNING!

OPERATION

To prevent personal injury, always remove the chuck key from the chuck after each use.

Installing Bits into Keyed Chucks (Fig. 4)

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 dam-

age or motor overloading may result. For best performance, be sure that

the bits are properly sharpened before use.

Fig. 4

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. To remove the bit, insert the chuck key into one of the holes in the

chuck and turn it counterclockwise.

Installing Bits into Keyless Chucks (Fig. 5)

For best performance, always use sharp, clean bits and be sure the

chuck jaws are clean. Dirt particles may cause the bit to line up improp-

erly. Do not use bits larger than the maximum recommended capacity of

the drill because gear damage or motor overloading may result.

Chuck jaws

Hole for

chuck key

WARNING!

To reduce the risk of injury, wear safety goggles or glasses with side shields. Unplug the tool before changing accessories or making adjustments.

Selecting Action (Fig. 6)

MILWAUKEE Hammer-Drills are designed to operate in either a "drill

only" mode or a "drilling with hammering action" mode.

Fig. 6

1. To select Drilling Action, pull the selector collar toward gear case

collar and rotate counter-clockwise until selector collar locks in place.

2. To select Hammer-Drilling Action, pull selector collar toward gear

case collar and rotate clockwise until selector collar locks in place.

NOTE: Constant pressure on bit must be maintained to engage ham-

mering mechanism. When pressure on bit is released, hammering

action will stop.

Using the Forward/Reverse Switch (Fig. 7)

Fig. 7

Forward

Fig. 5

Sleeve

1. Unplug the tool.

2. To open the chuck jaws, turn the sleeve in the direction marked

RELEASE.

3. Allow the bit to strike the bottom of the chuck and center the bit in the

chuck jaws.

4. To close the chuck jaws, hold the collar while turning the sleeve in

the direction marked GRIP. Tighten securely.

5. To remove the bit, hold the collar while turning the sleeve in the

direction marked RELEASE.

Chuck jaws

(located behind

dust shield)

Collar

Reverse

Trigger

The forward/reverse switch 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 switch.

1. For forward (clockwise) rotation, push the forward/reverse switch

to FWD as shown.

2. For reverse (counterclockwise) rotation, push the forward/reverse

switch to REV as shown. Although an interlock prevents reversing

the tool while the motor is running, allow the motor to come to a full

stop before reversing.

NOTE: When hammer-drilling, use the tool in forward rotation

(clockwise) only.

page 6

Locking Trigger Switch (Fig. 8)

The lock button holds trigger in the ON position for continuous full speed

use.

Fig. 8

APPLICATIONS

WARNING!

To reduce the risk of electric shock, check work area for hidden pipes and wires before drilling.

Lock

button

1. To lock the trigger switch, push in the lock button while pulling the

trigger. Then release the trigger.

2. To unlock the trigger switch, pull the trigger and release. The lock

button will pop out.

Selecting Speed

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

running under no load.

1. For Low speed (up to 1 000 rpm), turn the speed selector to

position 1.

2. For High speed (up to 2 500 rpm), turn the speed selector to

position 2.

Starting, Stopping & Controlling Speed

Place the drill bit on the work surface and apply firm pressure before

starting. A center punch may be used, in steel, to make starting easier.

Start the drill slowly to permit maximum control and to prevent the bit from

wandering. When the hole has been properly started, increase the speed

until maximum cutting efficiency is reached.

Increasing the speed of the drill permits increasing the amount of pres-

sure applied. However, too much pressure will slow the drill bit and

retard drilling efficiency. Too little pressure will cause the bit to slide over

the work and cause excessive friction which will dull the point of the bit.

See Specifications for RPM and blows per minute information.

1. To start the tool, pull the trigger.

2. To stop the tool, release the trigger.

3. To vary the speed, increase or decrease pressure on trigger. The

further the trigger is pulled, the greater the speed.

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 break-

through.

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 flow 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.

Stalling

If the drill slows due to loading, increase the speed intil it operates

properly. If stalling occurs, reverse the motor and remove the bit from the

work and start again.

Operating

Position the tool, grasp the handles firmly and pull the trigger. Always

hold 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 flutes and tend to

make the bit bind in the hole.

page 7

MAINTENANCE

FIVE YEAR TOOL LIMITED WARRANTY

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.

Maintaining Tools

Keep your tool in good repair by adopting a regular maintenance pro-

gram. 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 mount-

ing, broken parts and any other condition that may affect its safe opera-

tion. If abnormal noise or vibration occurs, turn the tool off immediately

and have the problem corrected before further use. Do not use a dam-

aged 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

Every MILWAUKEE tool is tested before leaving the factory and is war-

ranted to be free from defects in material and workmanship. MILWAUKEE

will repair or replace (at MILWAUKEEs discretion), without charge, any

tool (including battery chargers) which examination proves to be defec-

tive in material or workmanship from five (5) years after the date of

purchase. Return the tool and a copy of the purchase receipt or other

proof of purchase to a MILWAUKEE Factory Service/Sales Support

Branch location or MILWAUKEE Authorized Service Station, freight pre-

paid and insured. This warranty does not cover damage from repairs

made or attempted by other than MILWAUKEE authorized personnel,

abuse, normal wear and tear, lack of maintenance, or accidents.

Battery Packs, Flashlights, and Radios are warranted for one (1) year

from the date of purchase.

THE REPAIR AND REPLACEMENT REMEDIES DESCRIBED HEREIN ARE

EXCLUSIVE. IN NO EVENT SHALL MILWAUKEE BE LIABLE FOR ANY

INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES, INCLUDING

LOSS OF PROFITS.

THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRAN-

TIES, OR CONDITIONS, WRITTEN OR ORAL, EXPRESSED OR IMPLIED FOR

MERCHANTABLILITY OR FITNESS FOR PARTICULAR USE OR PURPOSE.

This warranty gives you specific legal rights. You may also have other

rights that vary from state to state and province to province. In those

states that do not allow the exclusion of implied warranties or limitation

of incidental or consequential damages, the above limitations or exclu-

sions may not apply to you. This warranty applies to the United States,

Canada, and Mexico only.

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 flow inside the tool.

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 flammable or

combustible solvents around tools.

Repairs

If your tool is damaged, return the entire tool to the nearest service

center.

page 8

ACCESSORIES

WARNING!

To reduce the risk of injury, always unplug the tool before attaching or removing accessories. Use only specifically recommended accessories. Others may be hazardous.

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.

Percussion Carbide-Tipped Bits

These carbide-tipped bits are specially designed for drilling through con-

crete and masonry. They are made with round shanks for use with

Hammer-Drills. Alloy steel shanks and bodies provide durability and long

life. The wide spiral with shallow oval flutes removes dust quickly to

assure maximum drilling efficiency.

Bit Catalog Overall

Diameter No. Lenth

1/8" 48-20-6800 3"

3/16" 48-20-6805 4"

3/16" 48-20-6806 6"

1/4" 48-20-6810 4"

1/4" 48-20-6811 6"

5/16" 48-20-6815 4"

5/16" 48-20-6816 6"

3/8" 48-20-6820 4"

3/8" 48-20-6821 6"

3/8" 48-20-6823 13-1/2"

7/16" 48-20-6825 6"

1/2" 48-20-6830 6"

1/2" 48-20-6833 13-1/2"

9/16" 48-20-6835 6"

5/8" 48-20-6840 6"

5/8" 48-20-6843 13-1/2"

Steel Carrying Case

Cat. No. 48-55-0711

Impact Resistant Carrying Case

Cat. No. 48-55-5378

8' Quik-Lok Cord

Cat. No. 48-76-4008

25' Quik-Lok Cord

Cat. No. 48-76-4025

Chuck Key

Cat. No. 48-66-3280

Key Holder

Cat. No. 48-66-4040

1/2" Keyed Chuck

Cat. No. 48-66-1365

Keyless Chuck

Cat. No. 48-66-0600

page 9

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