Milwaukee 2721-20 Operator's Manual
Cat. No. / No de cat.
2721-20
M18
™
FUEL™ SAWZALL® RECIPROCATING SAW WITH ONE-KEY
™
SCIE ALTERNATIVE ONE-KEY SAWZALL® FUEL™ M18
™
SIERRA RECÍPROCA M18™ FUEL™ ONE-KEY SAWZALL
®
OPERATOR'S MANUAL
MANUEL de L'UTILISATEUR
MANUAL del OPERADOR
WARNING To reduce the risk of injury, user must read and understand operator's manual.
AVERTISSEMENT An de réduire le risque de blessures, l'utilisateur doit lire et bien
comprendre le manuel.
ADVERTENCIA Para reducir el riesgo de lesiones, el usuario debe leer y entender el manual.
2
GENERAL POWER TOOL
SAFETY WARNINGS
WARNING
Read all safety warnings, instructions, illustrations and specica-
tions provided with this power tool. Failure to
follow all instructions listed below may result in
electric shock, 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-oper-
ated (cordless) power tool.
WORK AREA SAFETY
• 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 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.
ELECTRICAL SAFETY
• 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. Unmodied 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 conditions. 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.
• If operating a power tool in a damp location is
unavoidable, use a ground fault circuit interrupter
(GFCI) protected supply. Use of an GFCI reduces
the risk of electric shock.
PERSONAL SAFETY
• 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 inuence of drugs, alcohol or medication. A
moment of inattention while operating power tools
may result in serious personal injury.
• Use personal protective equipment. Always wear
eye protection. Protective equipment such as a dust
mask, non-skid safety shoes, hard hat or hearing
protection used for appropriate conditions will reduce
personal injuries.
• Prevent unintentional starting. Ensure the switch
is in the off-position before connecting to power
source and/or battery pack, picking up or carrying
the tool. Carrying power tools with your nger on the
switch or energizing 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.
• Dress properly. Do not wear loose clothing or
jewelry. Keep your hair and clothing away from
moving parts. Loose clothes, jewelry 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 dust
collection can reduce dust-related hazards.
• Do not let familiarity gained from frequent use of
tools allow you to become complacent and ignore
tool safety principles. A careless action can cause
severe injury within a fraction of a second.
POWER TOOL USE AND CARE
• 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. Any power tool that cannot be controlled
with the switch is dangerous and must be repaired.
• Disconnect the plug from the power source and/
or remove the battery pack, if detachable, from
the power tool before making any adjustments,
changing accessories, or storing power tools.
Such preventive safety measures reduce the risk of
starting the power tool accidentally.
• Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the
power tool or these instructions to operate the
power tool. Power tools are dangerous in the hands
of untrained users.
• Maintain power tools and accessories. 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, 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 hazard-
ous situation.
• Keep handles and grasping surfaces dry, clean
and free from oil and grease. Slippery handles and
grasping surfaces do not allow for safe handling and
control of the tool in unexpected situations.
BATTERY TOOL USE AND CARE
• Recharge only with the charger specied by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of re when used
with another battery pack.
• Use power tools only with specically designated
battery packs. Use of any other battery packs may
create a risk of injury and re.
3
• When battery pack is not in use, keep it away
from other metal objects, like paper clips, coins,
keys, nails, screws or other small metal objects,
that can make a connection from one terminal to
another. Shorting the battery terminals together may
cause burns or a re.
• Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact accidentally occurs, ush with water. If liquid contacts
eyes, additionally seek medical help. Liquid ejected
from the battery may cause irritation or burns.
• Do not use a battery pack or tool that is damaged or
modied. Damaged or modied batteries may exhibit
unpredictable behavior resulting in re, explosion or
risk of injury.
• Do not expose a battery pack or tool to re or excessive temperature. Exposure to re or temperature
above 265°F (130°C) may cause explosion.
• Follow all charging instructions and do not charge
the battery pack or tool outside the temperature
range specified in the instructions. Charging
improperly or at temperatures outside the specied
range may damage the battery and increase the risk
of re.
SERVICE
• Have your power tool serviced by a qualied
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
• Never service damaged battery packs. Service
of battery packs should only be performed by the
manufacturer or authorized service providers.
SPECIFIC SAFETY RULES FOR
SAWZALL
®
• Hold power tool by insulated gripping surfaces,
when performing an operation where the cutting
accessory may contact hidden wiring. Cutting ac-
cessory contacting a “live” wire may make exposed
metal parts of the power tool “live” and could give the
operator an electric shock.
• Use clamps or another practical way to secure
and support the workpiece to a stable platform.
Holding the work by hand or against your body leaves
it unstable and may lead to loss of control.
• 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 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
lter out microscopic particles.
SYMBOLOGY
Volts
Direct Current
No Load Stokes per Minute (SPM)
C
US
UL Listing for Canada and U.S.
SPECIFICATIONS
Cat. No. ..................................................... 2721-20
Volts.............................................................. 18 DC
No Load Strokes per Minute ...................... 0 - 3000
Length of Stroke ........................................... 1.125"
Battery Type ................................................. M18™
Charger Type................................................M18™
FUNCTIONAL DESCRIPTION
1. Quik-Lok® blade clamp
2. LED
3. Quik-Lok
®
blade clamp release lever
4. Insulating boot
5. Rafter hook (not shown)
6. Trigger
7. Trigger lock
8. Mode selector
9. Handle
10. Shoe release lever
11. Shoe
4
7
6
8
9
5
3
10
1
11
2
4
Removing broken blades from the
Quik-Lok
®
Blade Clamp
Broken blades can be removed by the following
methods.
• Remove battery pack before removing blades.
• Point the tool downward, slide up and hold the
release lever, and shake the tool up and down
(DO NOT turn the tool on while your ngers are
holding the blade clamp open). The shank of the
broken blade should drop out of the clamp.
• If shaking the tool doesn't work...
In most cases, a corner of the broken blade will
extend beyond the blade clamp. Slide up and hold
the release lever, and pull the broken blade out of
the clamp by this corner.
• If the broken stub doesn't extend far enough to be
grabbed by its corner, use a thin blade with small
teeth (such as a metal cutting blade) to hook the
blade that is jammed in the clamp while holding up
the release lever, and pull it out.
WARNING
To reduce the risk of injury, be sure
the blade always extends beyond
the shoe and workpiece throughout the stroke.
Blades may shatter if they impact the workpiece
or shoe.
Stroke
Stroke
ONE-KEY™
To learn more about the ONE-KEY functionality for
this tool, please reference the Quick Start guide in-
cluded with this product or go to milwaukeetool.com/
One-Key. To download the ONE-KEY app, visit the
App Store or Google Play from your smart device.
ASSEMBLY
WARNING
Recharge only with the charger
specied for the battery. For specic charging instructions, read the operator’s
manual supplied with your charger and battery.
Removing/Inserting the Battery
To remove the battery, push in the release buttons
and pull the battery pack away from the tool.
WARNING
Always remove battery pack before
changing or removing accessories.
To insert the battery, slide the pack into the body
of the tool. Make sure it latches securely into place.
WARNING
Only use accessories specically
recommended for this tool. Others
may be hazardous.
Selecting a Blade
The Quik-Lok® Blade Clamp can be used with all 1/2"
shank universal Sawzall
®
blades. Use MILWAUKEE
Sawzall
®
blades for best performance. When select-
ing a blade, choose the right type and length. Many
types of blades are available for a variety of appli-
cations: cutting metal, wood, nail-embedded wood,
scroll cutting, roughing-in, and contours.
Many lengths are also available. Choose a length
long enough to extend beyond the shoe and your
work throughout the stroke. Do not use blades less
than 3-1/2" long since they won't extend beyond
the shoe throughout the stroke.
Installing and Removing Blades from the
Quik-Lok
®
Blade Clamp
Remove battery pack before changing blades. Make
sure the spindle and blade clamp areas are clean.
Metal chips and sawdust may prevent the Quik-Lok
®
Blade Clamp from clamping securely.
1. Depending on the
1
2
job, the blade
may be inserted
with the teeth fac-
ing up or down.
To install a
blade, slide the
release lever up.
Insert the blade into the clamp until the tang butts
against the collar.
2. Release the lever and the spring loaded mecha-
nism will clamp the blade rmly in place.
3. Tug o
n blade to make sure it is securely locked in place.
4. To remove a blade, slide the release lever up
and pull the blade from the tool. Be careful when
handling hot blades.
Quik-Lok® Blade Clamp Maintenance
•Periodically clean dust and debris from the
Quik-Lok
®
Blade Clamp with dry compressed air.
• If the collar resists, slide the release lever back and
forth to shake debris loose.
• Periodically lubricate Quik-Lok
®
Blade Clamp with
a dry lubricant such as graphite.
5
OPERATION
WARNING
Always remove battery pack before
changing or removing accesso-
ries. Only use accessories specically recommended for this tool. Others may be hazardous.
To reduce the risk of injury, always wear safety
goggles or glasses with side shields.
Trigger Lock
To lock the trigger, push the trigger lock from the
side of the tool. The trigger will not work while the
switch is in the locked position. Always lock the trig-
ger and remove the battery pack before performing
maintenance and changing accessories. Lock the
trigger when storing the tool and when the tool is
not in use.
To unlock the trigger, push the trigger lock from the
side of the tool.
Selecting Mode
Allow the tool to come to a complete stop before
changing modes. Press the selector button
to cycle
between the settings. Select wireless
to change
the default settings via the ONE-KEY App on your
smart device.
Default Max SPM
Setting 1 Setting 2 Setting 3 Setting 4
Max
SPM
1500 2400 3000 3000
Ramp-up
Time*
1 sec. 2 sec. 3 sec. N/A
* Ramp-up time is the amount of time it takes for the tool
to reach Max Speed. This is benecial for cutting through
dense materials by allowing the blade to bite into the
material before increasing in speed, assisting in making a
smoother, more accurate cut.
WARNING
To reduce the risk of personal in-
jury, always hold tool securely.
Starting, Stopping and Controlling Speed
1. To start the tool, grasp the handle rmly and pull
the trigger.
2. To vary the speed, increase or decrease the pres-
sure on the trigger. The further the trigger is pulled,
the greater the speed.
3. To stop the tool, release the trigger. Make sure the
blade comes to a complete stop before removing
the blade from a partial cut or laying the tool down.
Electric Brake
The electric brake engages when the trigger is released, causing the blade to stop and allowing you
to proceed with your work. Generally, the saw blade
stops within two seconds. However, there may be a
delay between the time you release the trigger and
when the brake engages. Occasionally the brake may
miss completely. If the brake misses frequently, the
saw needs servicing by an authorized MILWAUKEE
service facility. Always wait for the blade to stop completely before removing the saw from the workpiece.
General Cutting
For straight or contour cutting from an edge, line
the blade up with your cutting line. Before the blade
contacts the workpiece, grasp the handle rmly and
pull the trigger. Then guide the tool along your cutting
line. Always hold the shoe at against the workpiece
to avoid excessive vibration.
Cutting Metals
Begin cutting at a slow speed, gradually increasing
speed as you cut. When cutting into metals or hard
materials that can not be cut from an edge, drill a
starting hole larger than the widest part of the blade.
WARNING
To reduce the risk of explosion,
electric shock and property damage, always check the work area for hidden gas
pipes, electrical wires or water pipes when mak-
ing blind or plunge cuts.
Plunge Cutting
This MILWAUKEE Sawzall® is ideal for plunge cutting directly into surfaces that can not be cut from
an edge, such as walls or oors. Plunge cutting may
be done two ways depending on how the blade is
inserted. Column A shows how to plunge cut with the
teeth of the blade facing downward. Column B shows
how to plunge cut with the teeth of the blade facing
upward. Do not plunge cut into metal surfaces (see
"Cutting Metals").
1. Insert the blade into the tool.
If you inserted the blade with the teeth facing
downward, hold the tool as shown in Column A,
resting the edge of the shoe on the workpiece.
If you inserted the blade with the teeth facing up-
ward, hold the tool as shown in Column B, resting
the edge of the shoe on the workpiece.
2. With the blade just above the workpiece, pull the
trigger. Using the edge of the shoe as a pivot, lower
the blade into the workpiece as shown.
3. As the blade starts cutting, raise the handle of
the tool slowly until the shoe rests rmly on the
workpiece. Then guide the tool along your cutting
line to acquire the desired cut.
NOTE: To make plunge cutting easier, use a heavy
gauge blade and install the blade with the teeth facing
upward as shown in Column B.
A
B
6
MAINTENANCE
WARNING
To reduce the risk of injury, always
unplug the charger and remove the
battery pack from the charger or tool before
performing any maintenance. Never disassemble
the tool, battery pack or charger. Contact a
MILWAUKEE service facility for ALL repairs.
Maintaining Tool
Keep your tool, battery pack and charger in good
repair by adopting a regular maintenance program.
Inspect your tool for issues such as undue noise,
misalignment or binding of moving parts, breakage of
parts, or any other condition that may affect the tool
operation. Return the tool, battery pack, and charger
to a MILWAUKEE service facility for repair. After six
months to one year, depending on use, return the
tool, battery pack and charger to a MILWAUKEE
service facility for inspection.
If the tool does not start or operate at full power with
a fully charged battery pack, clean the contacts on
the battery pack. If the tool still does not work properly, return the tool, charger and battery pack, to a
MILWAUKEE service facility for repairs.
Internal Battery
An internal battery is used to facilitate full ONE-KEY™
functionality.
To replace the battery:
1. Remove the battery pack.
+
2. Remove the two screws holding the battery door.
3. Pull out the battery board and
remove the old battery.
4. Insert the new battery (3V CR2032), with the positive site away from the board.
5. Slide the board back into the tool and replace the
battery door and screws.
WARNING
To reduce the risk of personal injury and damage, never immerse
your tool, battery pack or charger in liquid or
allow a liquid to ow inside them.
Cleaning
Clean dust and debris from vents. Keep handles
clean, dry and free of oil or grease. Use only mild
soap and a damp cloth to clean, 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 deter-
gents containing ammonia. Never use ammable or
combustible solvents around tools.
Repairs
For repairs, return the tool, battery pack and charger
to the nearest service center.
ACCESSORIES
WARNING
Use only recommended accesso-
ries. Others may be hazardous.
For a complete listing of accessories, go online to
www.milwaukeetool.com or contact a distributor.
SERVICE - UNITED STATES
1-800-SAWDUST (1.800.729.3878)
Monday-Friday, 7:00 AM - 6:30 PM CST
or visit www.milwaukeetool.com
Contact Corporate After Sales Service Technical
Support with technical, service/repair, or warranty
questions.
Email: metproductsupport@milwaukeetool.com
Become a Heavy Duty Club Member at
www.milwaukeetool.com to receive important
notications regarding your tool purchases.
SERVICE - CANADA
Milwaukee Tool (Canada) Ltd
1.800.268.4015
Monday-Friday, 7:00 AM - 4:30 PM CST
or visit www.milwaukeetool.ca
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