Milwaukee Impact Wrench User Manual
OPERATOR'S MANUAL
MANUEL de L'UTILISATEUR
MANUAL del OPERADOR
Catalog No.
No de Cat.
Número de Catálogo
9070-20
9071-20
9072-20
9072-22
9075-20
9092-20
9096-20
IMPACT WRENCH
CLÉ À PERCUSSION
LLAVE DE IMPACTO
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 operating 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.
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, breakage of
parts, and any other condition that may affect the tool’s operation. If damaged, have the tool serviced before using. Many acci-
dents are caused by poorly maintained tools.
23. Use only accessories that are recommended by the manufac-
turer for your model. Accessories that may be suitable for one tool,
may become hazardous when used on another tool.
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.
page 2
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.
SPECIFIC SAFETY RULES - IMPACT WRENCH
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. Maintain labels and nameplates. These carry important information. If unreadable or missing, contact a
ment.
3. 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.
MILWAUKEE
service facility for a free replace-
Symbology
Double Insulated
Volts Alternating Current/
Direct Current
Volts Alternating Current
Amperes
Impacts per Minute
Under Load (IPM)
Underwriters
Laboratories, Inc.
Canadian
Standards Association
Mexican Approvals Marking
Cat.
No.
9070-20
9071-20
9072-20
9075-20
9092-20
9096-20
* Only for use with the 7/16" or 5/8" Hex Quick Change chuck,
standard equiptment on the 9092-20 (7/16") and 9096-20 (5/8"),
optional accessory (Cat. No. 48-66-0061) on other models.
120 AC/DC
120 AC/DC
120 AC Only
120 AC/DC
120 AC Only
120 AC Only
Cat. No.
9070-20
9072-20
9092-20
9096-20
FUNCTIONAL DESCRIPTION
1. Drive shank
2. Forward/reverse switch (Cat. No. 9072-20, 9092-20 and 9096-20)
3. Trigger (Cat. No. 9072-20, 9092-20 and 9096-20)
Rocker switch (Cat. No. 9070-20, 9071-20, 9075-20)
4. Speed control dial (Cat. No. 9072-20, 9092-20 and 9096-20)
5. Quik-Lok® cord(Cat. No. 9072-20, 9092-20 and 9096-20)
6. Quick change chuck (Cat. No. 9092-20 and 9096-20)
7. Tool hanger (Cat. No. 9092-20 and 9096-20)
8. Tool hanger ring (Cat. No. 9092-20 and 9096-20)
1
Specifications
Drive
Shank
1/2"
1/2"
1/2"
3/4"
7/16" Hex
5/8" Hex
Volts
A
7
7
7
7
7
7
No Load
RPM
1800
1800
600-1800
1750
600-1800
600-1800
Quick Change Chuck Capacities*
Quick Change Auger Bits
1-1/2"
1-1/2"
1-1/2"
1-1/2"
2
3
Selfeed Bits
2-9/16"
2-9/16"
2-9/16"
2-9/16"
4
Impacts Per
Minute
2600
2600
1000-2600
2500
1000-2600
1000-2600
Average
Torque Output
300 ft-lbs.
300 ft-lbs.
100-300
100-315
100-315 ft-lbs.
Cat. No. 9072-20
ft-lbs.
380 ft-lbs.
ft-lbs.
Cat. No. 9075-20
8
7
6
3
Cat. No. 9092-20
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
will not fit the outlet, have a proper outlet installed by
a qualified electrician.
service facility before use. If the plug
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.
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 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. A
Fig. B
Fig. C
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
5.1 - 8
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
16
16
14
12
10
Extension Cord Length
100'
50'
16
16
14
12
10
75'
16
14
12
10
10
14
12
10
10
150'
12
10
--
--
--
--
200'
12
--
--
--
--
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
(Cat. No. 9072-20, 9092-20 and 9096-20)
MILWAUKEE
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.
's exclusive Quik-Lok® Cords provide instant field replace-
Cords (Fig. 1)
Fig. 3
Drive shank
1. To attach a socket or other accessory, push the accessory onto the
drive shank until it snaps into place.
2. To remove the accessory, pull it off the drive shank.
Attaching and Removing Accessories (Fig. 4)
Cat. No. 9070-20, 9072-20
These impact wrenches are intended only for use with sockets designed
for impact wrenches and that have a 1/2" square drive. Other sockets
could shatter or break, causing injury.
Fig. 4
Attaching and Removing the Tool Hanger (Fig. 2)
(Cat. No. 9092-20, 9096-20, or as an accessory)
Fig. 2
Gear case
screws
1. To attach, remove the two top gear case screws (Fig. 2).
2. Place the ring through the tool hanger.
3. Position the tool hanger on the tool over the two gear case screw
holes.
4. Replace the two gear case screws. Hand tighten the screws.
5. To remove, reverse the procedure.
Ring
Tool
hanger
WARNING!
Use only sockets and other accessories specifically
designed for use on impact wrenches and drivers.
Other sockets and accessories might shatter or
break causing injury.
Drive shank
Detent pin
1. To attach a socket or other accessory, align the hole in the accessory with the detent pin on the drive shank. Hold the detent pin in
while pushing the socket onto the drive shank. The detent pin will
snap into place in the hole to secure the socket.
2. To remove the accessory, insert a nail or other thin object into the
hole in the accessory and press the detent pin in. Pull the accessory
off the drive shank.
Attaching and Removing Accessories (Fig. 5)
Cat. No. 9092-20, 9096-20, or other Impact Wrenches using the
Quick Change 1/2" Square Drive to 7/16" Hex Adapter
Cat. No. 9092-20 and accessory Cat. No. 48-66-0061 are intended for
use with drill bits and adapters with a 7/16" Hex Quick Change shank.
Cat. No. 9096-20 is intended for use with drill bits and adapters with a
5/8" Hex Quick Change shank. Both Hex Quick Change shanks have a
ball-retainer groove. They are not intended for use with Hex Shank Bit
Extensions.
Fig. 5
Open (Release)
Ball-retainer
groove
Closed (Locked)
Attaching and Removing Accessories (Fig. 3)
Cat. No. 9071-20, 9075-20
This impact wrench is intended only for use with sockets designed for
impact wrenches and that have a 1/2" square drive (3/4" square drive
for Cat. No. 9075-20). Other sockets could shatter or break, causing injury.
1. To attach an accessory, pull the chuck collar forward and insert the
accessory shank. Release the collar. It may be necessary to pull the
bit out slightly to engage the holding mechanism.
2. To remove the accessory, pull the chuck collar forward and remove
the accessory. Release the collar.
page 5
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.
Using the Forward/Reverse Switch (Fig. 6)
Cat. No. 9072-20, 9092-20, and 9096-20
This impact wrench is equipped with a forward/reverse switch that may
be set to forward or reverse rotation.
Fig. 6
1. For forward (clockwise) rotation, push the forward/reverse switch in
the direction shown. Check the direction of rotation before use.
2. For reverse (counterclockwise) rotation, push the forward/reverse
switch in the direction shown. Check the direction of rotation before
use.
Reverse
Forward
Forward/ Reverse
Switch
Starting, Stopping and Controlling Speed (Fig. 8)
Cat. No. 9072-20, 9092-20, and 9096-20
Fig. 8
Trigger
Speed dial
This impact wrench may be operated at any speed from 0 to full speed.
The speed will remain variable up to the chosen speed dial setting by use
of the trigger. The speed dial turns clockwise to increase the speed or
counterclockwise to decrease the speed (Fig. 8).
1. Select a speed on the speed dial.
2. To start the tool, pull the trigger.
3. To vary the driving speed, increase or decrease pressure on the trigger. The further the trigger is pulled, the greater the speed.
4. To stop the tool, release the trigger.
Starting and Stopping the Tool (Fig. 9)
Cat No. 9070-20, 9071-20, 9075-20
Fig. 9
To increase
the speed
WARNING!
To reduce the risk of injury, keep hands and cord
away from the bit and all moving parts.
WARNING!
To reduce the risk of explosion, electric shock and
property damage, always check the work area for
hidden pipes and wires before drilling.
WARNING!
To reduce the risk of injury, only grasp tool by
handle and red insulated surfaces (Fig. 7). Do not
hold gray gear case when impacting or drilling.
Fig. 7
page 6
Rocker
switch
These impact wrenches are equipped with a rocker switch that offers
both forward and reverse rotation.
1. For forward (clockwise) rotation, pull the lower portion of the switch.
2. For reverse (counterclockwise) rotation, pull the upper portion of the
switch.
NOTE: To prevent damage to the motor and internal mechanism, allow
the motor to stop completely before switching from forward to reverse or
from reverse to forward.
Impacting Techniques
The longer a bolt, screw, or nut is impacted, the tighter it will become. To
help prevent damaging the fasteners or workpieces, avoid excessive impacting. Be particularly careful when impacting smaller fasteners because
they require less impacting to reach optimum torque.
Practice with various fasteners, noting the length of time required to reach
the desired torque. Check the tightness with a hand-torque wrench. If the
fasteners are too tight, reduce the impacting time. If they are not tight
enough, increase the impacting time.
Impacting for two seconds is generally sufficient for a 3/8" bolt and one
second for a 5/16" bolt. However, oil, dirt, rust or other matter on the
threads or under the head of the fastener affects the degree of tightness.
The torque required to loosen a fastener averages 75% to 80% of the
tightening torque, depending on the condition of the contacting surfaces.
However, if rust or corrosion causes seizing, more torque may be required.
On light gasket jobs, run each fastener down to a relatively light torque
and use a hand torque wrench for final tightening.
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