Milwaukee 2420-20 User Manual
Cat. No.
No de cat.
2420-20
OPERATOR'S MANUAL
MANUEL de L'UTILISATEUR
MANUAL del OPERADOR
12 VOLT HACKZALL™ RECIPROCATING SAW
SCIE ALTERNATIVE HACKZALL™ DE 12 V
SIERRA ALTERNATIVA DE 12 V HACKZALL™
TO REDUCE THE RISK OF INJURY, USER MUST READ OPERATOR'S MANUAL.
AFIN DE RÉDUIRE LE RISQUE DE BLESSURES, L'UTILISATEUR DOIT LIRE LE MANUEL DE
L'UTILISATEUR.
PARA REDUCIR EL RIESGO DE LESIONES, EL USUARIO DEBE LEER EL MANUAL DEL
OPERADOR.
GENERAL POWER TOOL SAFETY WARNINGS
WARNING READ ALL SAFETY WARNINGS AND 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.
WORK AREA SAFETY
• Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
• Do not operate power tools in explosive atmospheres, 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.
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. 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 elec-
tric shock if your body is earthed or grounded.
• Do not expose power tools to rain or wet conditions. W ater 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 residual current device
(RCD) protected supply. Use of an RCD reduces
the risk of electric shock.
• 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 personal protective equipment. Always
wear eye protection. Protective equipment such
as 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 fi nger on the switch or energising 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
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
dust collection can reduce dust-related hazards.
• 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.
2
PERSONAL SAFETY
POWER TOOL USE AND CARE
• 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
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. 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 hazardous situation.
BA TTER Y T OOL USE AND CARE
• Recharge only with the charger specifi ed by
the manufacturer. A charger that is suitable for
one type of battery pack may create a risk of fi re
when used with another battery pack.
• Use power tools only with specifi cally desig-
nated battery packs. Use of any other battery
packs may create a risk of injury and fi re.
• 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 termi-
nals together may cause burns or a fi re.
• Under abusive conditions, liquid may be ejected from the battery, avoid contact. If contact
accidentally occurs, fl ush with water. If liquid
contacts eyes, additionally seek medical help.
Liquid ejected from the battery may cause irritation or burns.
SERVICE
• 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.
SPECIFIC SAFETY RULES
• Hold power 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
also make exposed metal parts of the tool “live”
and shock the operator.
• 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, depend-
ing 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
particles.
3
HACKZALL
Symbology
Direct Current
No Load Strokes
per Minute (SPM)
Underwriters Laboratories, Inc.
United States and Canada
Specifi cations
Cat. No.
2420-20 12 0 - 3000 1/2”
Volts DCNo Load Strokes
Per Minute
Length of
Stroke
ASSEMBLY
WARNING Recharge only with the char-
ger specifi ed for the battery. For specifi c charg-
ing instructions, read the operator’s manual
supplied with your charger and battery.
Inserting/Removing the
Battery
To remove the battery, push in
the release buttons and pull the
battery pack away from the tool.
To insert the battery, slide the
pack into the body of the tool.
Make sure it latches securely
into place.
Fig. 1
Release
buttons
WARNING Always remove battery
pack before changing or removing accessories. Only use accessories specifically
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 Hackzall® and Sawzall®
blades. Use MILWAUKEE blades for best performance. When selecting a blade, choose the right
type and length. Many types of blades are available
for a variety of applications: 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
Functional Description
1
1. Shoe
2. Quik-Lok™ blade clamp
3. Fuel Gauge
4. Handle
5. Trigger
less than 3-1/2” long since they won’t extend
beyond the shoe throughout the stroke.
For best performance and longest life, see your
MILWAUKEE Electric Tool catalog or go online to
www.milwaukeetool.com to select the best blade
for the job.
Installing and Removing Blades from the QuikLok® 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.
Fig. 2
1. Depending on the job, the blade may be inserted
2. Release collar and the spring loaded mechanism
3. Twist collar in the opposite direction of the ar-
4. Tug on blade to make sure it is securely locked
5. To remove a blade, twist collar in the direction of
4
2
7
6
6. Trigger lock
7. LED
Blade
with the teeth facing up or down. To install a
blade, twist collar in the direction of the arrow
while inserting the blade into the clamp until the
tang butts against the collar.
will clamp the blade fi rmly in place.
row to ensure that the blade is locked into the
clamp.
in place.
the arrow while pulling on the blade. Be careful
when handling hot blades.
5
4
Blade clamp
Quik-Lok® Blade Clamp Maintenance
• Periodically clean dust and debris from the QuikLok® Blade Clamp with dry compressed air.
• If the collar resists twisting, twist the collar back
and forth to shake debris loose.
3
• Periodically lubricate Quik-Lok® Blade Clamp with
a dry lubricant such as graphite.
Removing broken blades from the Quik-Lok
Blade Clamp
Broken blades can be removed by the following:
• Remove battery pack before removing blades.
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
(Fig. 3).
Fig. 3
Stroke
Stroke
• Point the tool downward, twist the collar, and
shake the tool up and down (DO NOT turn the tool
on while your fi 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. Twist the collar 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 twisting
the collar and pull it out.
OPERATION
WARNING T o reduce the risk of injury ,
keep hands away from the blade and other
moving parts. Always wear safety goggles or
glasses with side shields. Use only specifi -
cally recommended accessories. Others may
be hazardous.
Trigger Lock
To lock the trigger,
push the trigger lock as
shown.The trigger will
not work while the switch
is in the locked position.
Always lock the trigger
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 as
shown.
Fig. 4
Push for
Unlock
Push for
Lock
Fuel Gauge
To determine the amount of charge left in the battery, pull the trigger. The Fuel Gauge will light up
for 2-3 seconds.
T o signal the end of charge, 1 light on the fuel gauge
will fl ash for 2-3 seconds.
Starting, Stopping and Controlling Speed
To start the tool, grasp the handle fi rmly and pull
the trigger. An LED is turned on when the trigger
is pulled.
To vary the speed, increase or decrease the pres-
sure on the trigger. The further the trigger is pulled,
the greater the speed.
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.
5
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 fi rmly
and pull the trigger. Then guide the tool along your
cutting line. Always hold the shoe fl 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 T o reduce the risk of explo-
sion, electric shock and property damage,
always check the work area for hidden gas
pipes, electrical wires or water pipes when
making blind or plunge cuts.
Plunge Cutting
Y our MILWAUKEE Hackzall® is ideal for plunge cutting directly into surfaces that can not be cut from
an edge, such as walls or fl oors. Do not plunge cut
into metal surfaces (see "Cutting Metals").
1. Insert the blade into
the tool with the teeth
facing down. Hold the
tool as shown, 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 fi rmly on the
workpiece. Then guide
the tool along your cutting line to acquire the
desired cut.
Fig. 5
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.
After six months to one year, depending on use,
return the tool, battery pack and charger to A
MILWAUKEE service facility for:
• Lubrication
• Mechanical inspection and cleaning (gears,
spindles, bearings, housing, etc.)
• Electrical inspection (battery pack, charger,
motor)
• Testing to assure proper mechanical and electrical
operation
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.
WARNING To reduce the risk of per-
sonal injury and damage, never immerse your
tool, battery pack or charger in liquid or allow
a liquid to fl ow inside them.
Cleaning
Clean dust and debris from charger and tool
vents. Keep tool handles clean, dry and free of oil
or grease. Use only mild soap and a damp cloth
to clean the tool, battery pack and charger 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
For repairs, return the tool, battery pack and charger to the nearest service center listed on the back
cover of this operator's manual.
6
ACCESSORIES
WARNING Always remove battery
pack before changing or removing accessories. Only use accessories specifically
recommended for this tool. Others may be
hazardous.
For a complete listing of accessories refer to your
MILWAUKEE Electric Tool catalog or go online to
www.milwaukeetool.com. To obtain a catalog, contact your local distributor or a service center listed
on the back cover of this operator’s manual.
FIVE YEAR TOOL LIMITED WARRANTY
Every MILWAUKEE electric power tool (including battery charger) is warranted to the original purchaser
only to be free from defects in material and workmanship. Subject to certain exceptions, MILWAUKEE will
repair or replace any part on a electric power tool which, after examination, is determined by MILWAUKEE
to be defective in material or workmanship for a period of fi ve (5) years* after the date of purchase. Return
the electric power tool and a copy of proof of purchase to a MILWAUKEE factory Service/Sales Support
Branch location or MILWAUKEE Authorized Service Station, freight prepaid and insured, are requested
for this warranty to be effective. This warranty does not apply to damage that MILWAUKEE determines
to be from repairs made or attempted by anyone other than MILWAUKEE authorized personnel, misuse,
alterations, abuse, normal wear and tear, lack of maintenance, or accidents.
* The warranty period for Hoists (lever, hand chain, & electric chain hoists), all Ni-CD battery packs,
Work Lights (cordless fl ashlights), Job Site Radios, and Trade Titan™ Industrial Work Carts is one (1)
year from the date of purchase. *The warranty period for Li-Ion battery packs that do not contain V™technology – 4.0 volts through 18.0 volts - is two (2) years from the date of purchase.
*There is a separate warranty for V™-technology Li-Ion Battery Packs V™18 volts and above that accompany V™-technology cordless power tools:
*Every MILW AUKEE V™-technology Li-Ion Battery Pack 18 volts or above is covered by an initial 1000
Charges/2 Years free replacement warranty. This means that for the earlier of the fi rst 1000 charges
or two (2) years from the date of purchase/fi rst charge, a replacement battery will be provided to the
customer for any defective battery free of charge. Thereafter, customers will also receive an additional
warranty on a pro rata basis up to the earlier of the fi rst 2000 charges or fi ve (5) Years from the date
of purchase/fi rst charge. This means that every customer gets an additional 1000 charges or three (3)
years of pro rata warranty on the V™-technology Li-Ion Battery Pack 18 volts or above depending upon
the amount of use. During this additional warranty period, the customer pays for only the useable service
received over and above the fi rst 1000 Charges/2 years, based on the date of fi rst charge and number
of charges found on the battery pack via Milwaukee’s V™-technology Service Reader.
Warranty Registration is not necessary to obtain the applicable warranty on a MILWAUKEE product. The
manufacturing date of the product will be used to determine the warranty period if no proof of purchase
is provided at the time warranty service is requested.
ACCEPTANCE OF THE EXCLUSIVE REP AIR AND REPLACEMENT REMEDIES DESCRIBED HEREIN
IS A CONDITION OF THE CONTRACT FOR THE PURCHASE OF EVERY MILWAUKEE PRODUCT.
IF YOU DO NOT AGREE TO THIS CONDITION, YOU SHOULD NOT PURCHASE THE PRODUCT. IN
NO EVENT SHALL MILWAUKEE BE LIABLE FOR ANY INCIDENT AL, SPECIAL, CONSEQUENTIAL OR
PUNITIVE DAMAGES, OR FOR ANY COSTS, A TTORNEY FEES, EXPENSES, LOSSES OR DELA YS
ALLEGED TO BE AS A CONSEQUENCE OF ANY DAMAGE TO, FAILURE OF, OR DEFECT IN ANY
PRODUCT INCLUDING, BUT NOT LIMITED T O, ANY CLAIMS FOR LOSS OF PROFITS. THIS W ARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES OR CONDITIONS, WRITTEN OR
ORAL, EXPRESSED OR IMPLIED. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING,
MILWAUKEE DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR USE OR PURPOSE, AND ALL OTHER WARRANTIES.
This warranty applies to product sold in the U.S.A., Canada and Mexico only.
Please consult the ‘Service Center Search’ in the Parts & Service section of MILWAUKEE’s web-site
www.milwaukeetool.com or call 1.800.SA WDUST (1.800.729.3878) to locate your nearest service facility
for warranty and non-warranty service on a MILWAUKEE electric power tool.
7
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