Milwaukee 6320-20 Operator's Manual
OPERATOR'S MANUAL
MANUEL de L'UTILISATEUR
MANUAL del OPERADOR
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.
Cat. No.
No de cat.
6320-20
18 VOLT METAL CUTTING SAW
SCIE À MÉTAUX 18 VOLTS
SIERRA DE 18 VOLTS PARA CORTAR METAL
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3
PERSONAL SAFETY
GENERAL POWER TOOL SAFETY WARNINGS
WORK AREA SAFETY
ELECTRICAL 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.
• 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. 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 residual current device
(RCD) protected supply. Use of an RCD reduces
the risk of electric shock.
• 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.
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.
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 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.
• 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.
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5
• 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.
BATTER Y T OOL USE AND CARE
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.
• 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.
SPECIFIC SAFETY RULES
4. NEVER hold piece being cut in your hands
or across your leg. Secure the workpiece to
a stable platform. It is important to support the
work properly to minimize body exposure, blade
binding, or loss of control.
5. Hold 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.
6. When ripping always use a rip fence or
straight edge guide. This improves the accuracy of cut and reduces the chance for blade
binding.
7. Always use blades with correct size and
shape (diamond versus round) arbor holes.
Blades that do not match the mounting hardware
of the saw will run eccentrically, causing loss of
control.
8. Never use damaged or incorrect blade wash-
ers or bolts. The blade washers and bolts were
specially designed for your saw, for optimum
performance and safety of operation.
9. Causes and Operator Prevention of kick-
back:
Kickback is a sudden reaction to a pinched,
bound or misaligned saw blade, causing an uncontrolled saw to lift up and out of the workpiece
toward the operator.
When the blade is pinched or bound tightly by the
kerf closing down, the blade stalls and the motor
reaction drives the unit rapidly back toward the
operator.
If the blade becomes twisted or misaligned in the
cut, the teeth at the back edge of the blade can
dig into the top surface of the wood causing the
blade to climb out of the kerf and jump back toward
operator.
Kickback is the result of saw misuse and/or incorrect operating procedures or conditions and can
be avoided by taking proper precautions as given
below:
a. Maintain a firm grip with both hands on
the saw and position your arms to resist
kickback forces. Position your body to
either side of the blade, but not in line with
the blade. kickback could cause the saw to
jump backwards, but kickback forces can be
controlled by the operator, if proper precautions
are taken.
b. When blade is binding, or when interrupting
a cut for any reason, release the trigger and
hold the saw motionless in the material until
the blade comes to a complete stop. Never
attempt to remove the saw from the work or
DANGER:
1. Keep hands away from cutting area and blade.
Keep your second hand on auxiliary handle
or motor housing. If both hands are holding the
saw, they cannot be cut by the blade.
2. Do not reach underneath the workpiece. The
guard cannot protect you from the blade below
the workpiece.
3. Adjust the cutting depth to the thickness
of the workpiece. Less than a full tooth of the
blade teeth should be visible below the workpiece.
Symbology
Direct Current
No Load Revolutions per
Minute (RPM)
Underwriters Laboratories, Inc.
United States and Canada
pull the saw backward while the blade is in
motion or kickback may occur. Investigate
and take corrective actions to eliminate the
cause of blade binding.
c. When restarting a saw in the workpiece, cen-
ter the saw blade in the kerf and check that
saw teeth are not engaged into the material. If
saw blade is binding, it may walk up or kickback
from the workpiece as the saw is restarted.
d. Support large panels to minimize the risk of
blade pinching and kickback. Large panels
tend to sag under their own weight. Supports
must be placed under the panel on both sides,
near the line of cut and near the edge of the
panel.
e. Do not use dull or damaged blade. Unsharp-
ened or improperly set blades produce narrow
kerf causing excessive friction, blade binding
and kickback.
f. Blade depth and bevel adjusting locking le-
vers must be tight and secure before making
cut. If blade adjustment shifts while cutting, it
may cause binding and kickback.
g. Use extra caution when making a "Plunge
Cut" into existing walls or other blind areas.
The protruding blade may cut objects that can
cause kickback.
10.Check lower guard for proper closing before
each use. Do not operate the saw if lower
guard does not move freely and close instantly. Never clamp or tie the lower guard into
the open position. If saw is accidentally dropped,
lower guard may be bent. Raise the lower guard
with the retracting handle and make sure it
moves freely and does not touch the blade or
any other part, in all angles and depths of cut.
11. Check the operation and condition of the
lower guard spring. If the guard and the
spring are not operating properly, they must
be serviced before use. Lower guard may op-
erate sluggishly due to damaged parts, gummy
deposits, or a buildup of debris.
12.Lower guard should be retracted manually
only for special cuts such as "Plunge Cuts"
and "Compound Cuts". Raise lower guard
by retracting handle and as soon as blade
enters the material, the lower guard must be
released. For all other sawing, the lower guard
should operate automatically.
13.Always observe that the lower guard is
covering the blade before placing saw down
on bench or fl oor. An unprotected, coasting
blade will cause the saw to walk backwards,
cutting whatever is in its path. Be aware of the
time it takes for the blade to stop after switch is
released.
14.Maintain labels and nameplates. These carry
important information. If unreadable or missing,
contact a MILWAUKEE service facility for a free
replacement.
15.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.
Y our 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 specifi cally designed to fi lter out microscopic
particles.
16.Do not touch material after it has been cut.
Cut material may be very hot.
17.Do not use cutting oil. The use of cutting oil
may cause a fi re.
18.Do not use tool near fl ammable material.
Sparks may cause fi re.
19.Do not cut workpieces covered or stained
with gas, oil, solvents, thinners, etc. Exposure to these materials may damage the
transparent guard.
20.Do not remove the transparent front guard.
If the transparent front guard is damaged or
missing, return tool to authorized service station
for replacement.
21.Do not start the blade when in contact with
workpiece.
Wait for blade to reach full speed
before beginning cut.
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FUNCTIONAL DESCRIPTION
Blade
Size
6-7/8"
Cat.
No.
6320-20
Volts
DC
18
Specifi cations
No Load
RPM
3 200
Arbor
20 mm
Depth of Cut
At 90°
0 to 2-13/32"
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
11
1. Lock-off button
2. Trigger
3. Handle
4. Shoe
5. Lower guard lever
6. Lower guard
7. Blade bolt
8. Blade fl ange
9. Blade
10. Sight line
11. Transparent front guard
12. Upper guard
13. Front handle
14. Wrench
15. Spindle lock button
16. Depth adjusting lever
ASSEMBLY
WARNING Recharge only with the
charger specifi ed for the battery. For specifi c
charging instructions, read the operator’s
manual supplied with your charger and
battery.
WARNING Always lock trigger or
remove battery pack before changing or removing accessories. Only use accessories
specifi cally recommended for this tool. Others
may be hazardous.
Bolt
Outer
fl ange
Inner fl ange
Spindle
Fig. 2
Removing Battery Pack from Tool
Push in the release buttons and remove the battery pack.
Inserting Battery Pack into Tool
To insert the battery pack into the tool, push in
the release buttons and slide it into the body of
the tool.
NOTE: Always use a fully charged battery pack.
A low charge may cause blade binding and kickback.
Selecting Blade
Select a blade appropriate for your application. Refer to the “Accessories” section for a list of blades to
be used for the proper applications of this tool.
Always use sharp blades. Dull blades tend to
overload the tool and increase the chance of KICKBACK. Only use thin kerf blades with a maximum
safe operating speed greater than the no load RPM
marked on the tool's nameplate. Read the blade
manufacturer's instructions before use. Do not use
any type of abrasive cut-off wheel or dry diamond
cutting blades. Use the correct blade type for your
application. Using the wrong blade may result in
reduced performance or damage to the blade. Do
not use blades that are cracked or have broken
teeth. Do not sharpen ferrous metal cutting blades;
see the blade manufacturer's recommendations
regarding sharpening.
Installing and Removing Blades
1. Remove battery pack.
2. Place the saw on a fl at surface with the blade
facing upwards. To remove the bolt from the
spindle, push in the spindle lock button. While
holding in the spindle lock button, use the wrench
provided with the tool to turn the bolt clockwise.
Remove the bolt and blade fl ange.
3. Slide the lower guard lever up to raise the lower
guard. Remove the blade from the spindle. Always clean the spindle, upper guard and lower
guard to remove any dirt and dust.
NOTE: Do not remove inner blade fl ange. Larger
diameter of inner fl ange should face the blade.
(Fig. 2). Release the lower guard lever.
Fig. 1
Fig. 3
4. To install a blade, place the blade on the spindle
with the teeth pointing in the same direction as
the arrow on the lower guard.
5. Place the blade fl ange on the spindle and hand
tighten the bolt.
6. While holding in the spindle lock button, use the
wrench to turn the bolt counterclockwise and
tighten.
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3. Raise or lower the shoe to the desired position.
For the proper depth setting, the blade should
extend no more than 1/4" below the material
being cut (Fig. 5).
Fig. 4
Fig. 5
1/4"
WARNING
To reduce the risk of injury ,
do not remove the transparent front guard.
If the transparent front guard is damaged
or missing, return tool to authorized service
station for replacement.
Adjusting Depth
1. Remove battery pack.
2. To adjust the depth of the cut, hold the saw by
the handle and loosen the depth adjusting lever
by pushing it down toward the shoe (Fig. 4).
4. Lift the depth adjusting lever up towards the
motor housing to secure the shoe position.
Transparent Front Guard
The transparent front guard allows easy viewing of
the cutting line. If the transparent guard is cracked
or broken, return it to a MILWAUKEE service facility
for replacement. Never use the metal cutter with a
damaged or missing transparent guard.
OPERATION
WARNING T o reduce the risk of injury ,
wear safety goggles or glasses with side
shields.
WARNING Always remove battery
pack before changing or removing accessories. Only use accessories specifically
recommended for this tool. Others may be
hazardous.
Causes and Operator Prevention of KICKBACK:
KICKBACK is a sudden reaction to a pinched,
bound or misaligned saw blade, causing an
uncontrolled saw to lift up and out of the workpiece toward the operator.
When the blade is pinched or bound tightly
by the kerf, or cutting slot, closing down, the
blade stalls and the motor reaction drives the
unit rapidly back toward the operator.
If the blade becomes twisted or misaligned in
the cut, the teeth at the back edge of the blade
can dig into the top surface of the wood causing the blade to climb out of the kerf and jump
back toward operator.
KICKBACK is the result of tool misuse and/or
incorrect operating procedures or conditions
and can be avoided by taking proper precautions as given below:
1. Maintain a fi rm grip with both hands on the
saw and position your body and arm to allow
you to resist KICKBACK forces. KICKBACK
forces can be controlled by the operator, if
proper precautions are taken.
2. When blade is binding, or when interrupting
a cut for any reason, release the trigger and
hold the saw motionless in the material until
the blade comes to a complete stop. Never
attempt to remove the saw from the work or
pull the saw backward while the blade is in
motion or KICKBACK may occur. Investigate
and take corrective actions to eliminate the
cause of blade binding.
3. When restarting a saw in the workpiece,
center the saw blade in the kerf, or cut, and
check that saw teeth are not engaged into the
material. If saw blade is binding, it may walk up
or KICKBACK from the workpiece as the saw is
restarted.
4. Support large panels to minimize the risk of
blade pinching and KICKBACK. Large panels
tend to sag under their own weight. Supports
must be placed under the panel on both sides,
near the line of cut and near the edge of the
panel.
5. Do not use dull or damaged blades. Unsharp-
ened or improperly set blades produce narrow
kerf causing excessive friction, blade binding
and KICKBACK.
Fig. 7
Fig. 6
6. Blade depth and bevel adjusting locking le-
vers must be tight and secure before making
cut. If blade adjustment shifts while cutting, it
may cause binding and KICKBACK.
7. Use extra caution when making a “Pocket
Cut” into existing walls or other blind areas.
The protruding blade may cut objects that can
cause KICKBACK.
8. Set the depth of cut for no more than 1/8" to
1/4" greater than the thickness of the stock.
The less blade exposed, the less chance of
binding and KICKBACK. Before cutting, be sure
depth and bevel adjustments are tight.
9. Be cautious of pitchy, knotty, wet or warped
stock. These are most likely to create pinching
conditions and possible KICKBACK. Do not rip
warped lumber. Avoid cutting nails.
10.Use a rip fence or edge guide when ripping.
Guides improve control and reduce blade
binding.
11. Stay alert. Any distraction can cause twisting
or binding. Repetitive cuts may lull the user into
careless movements.
General Operation
Always clamp the workpiece securely on a saw
horse or bench (Fig. 6). See “APPLICATIONS” for
the correct way to support your work in different
situations.
1. Draw a cutting line. Place the front of the shoe on
the edge of the workpiece without making blade
contact. Hold the handle with one hand and the
front handle with the other (Fig. 7).
2. Line up the sight line with your cutting line. Position your arms and body to resist KICKBACK.
3. To start the saw, push the lock-off button down
while pulling the trigger. Allow the motor to reach
full speed before beginning cut.
4. While cutting, keep the shoe fl at against the
workpiece and maintain a fi rm grip. Do not force
the saw through the workpiece. Forcing a saw
can cause KICKBACK. Use a light, continuous
pressure to make the cut while following the cut
line through the transparent guard or sight line.
5. If making a partial cut, restarting in mid-cut or
correcting direction, allow the blade to come to
a complete stop. To resume cutting, center the
blade in the kerf, back the saw away from cutting edge a few inches, push the lock-off button
down while pulling the trigger and re-enter the
cut slowly.
6. If the saw binds and stalls, maintain a fi rm grip
and release the trigger immediately. Hold the
saw motionless in the workpiece until the blade
comes to a complete stop.
7. After fi nishing a cut, be sure the lower guard
closes and the blade comes to a complete stop
before setting the saw down.
Electric Brake
This tool features an electric brake. The 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. If the brake misses frequently, the saw
needs servicing by an authorized MILWAUKEE
service facility. The brake is not a substitute for
the guard, and you must always wait for the blade
to stop completely before removing the saw from
the workpiece.
Troubleshooting
If the blade does not follow a straight line:
• Teeth are dull. This is caused by hitting a hard
object such as a nail or stone, dulling teeth on
one side. The blade tends to cut to the side with
the sharpest teeth.
• Shoe is out of line or bent
• Blade is bent
If the blade binds, smokes or turns blue from
friction:
• Blade is dull
• Blade is on backwards
• Blade is bent
• Blade is dirty
• Workpiece is not properly supported
• Incorrect blade is being used
• Battery charge is low
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11
APPLICATIONS
This tool is intended for cutting unhardened ferrous
metal, non-ferrous metal, plastics, fi ber cement
board, and wood. Refer to the “Accessories” section for a list of blades to be used for the proper
applications of this tool. The following precautions
must be followed to reduce the risk of injury:
• Do not cut stacked materials. Cut one piece at a
time.
• Do not cut hardened steel.
• Cut materials with the wider edge of the shoe over
the clamped side of the material.
• Do not touch the saw blade, workpiece, or cutting
chips with bare hands immediately after cutting;
they may be hot and could burn skin.
Cutting Angled Materials
When cutting angle materials, tilt the tool back to
avoid having the lower guard rest on the angle.
Fig. 8
Fig. 9
Incorrect
technique
Correct
technique
Fig. 10
properly supporting the workpiece, the blade will
tend to bind, causing KICKBACK. Support large
sheets. Be sure to set the depth of the cut so that
you only cut through the workpiece, not through
the supports. When cutting widths greater than 4",
clamp or tack 1" lumber to workpiece and use the
inside edge of the shoe as a guide.
Cutting Thin or Corrugated Materials
Cut thin and corrugated materials at least 1" from
the edge of the workpiece to avoid injury or damage to the tool caused by thin strips of metal being
pulled into the upper guard.
Cutting Large Sheets
Large sheets sag or bend if they are not correctly
supported. If you attempt to cut without leveling and
WARNING To reduce the risk of elec-
tric shock, check work area for hidden pipes
and wires before making pocket cuts.
Pocket Cutting
Pocket cuts are made in the middle of the workpiece
when it can not be cut from an edge. We recommend
using a Sawzall® reciprocating saw or jig saw for this
type of cut. However, if you must use a circular saw
to make a pocket cut, USE EXTREME CAUTION.
T o maintain control of the saw during pocket cutting,
keep both hands on the saw.
1. Beginning at a corner, line up the sight line with
your cutting line. Tilt the saw forward, fi rmly fi x-
ing the front of the shoe on the workpiece. The
blade should be just above cutting line, but not
touching it. Raise the lower guard using the lower
guard lever.
2. To start the saw, push the lock-off button down
while pulling the trigger. Allow the motor to reach
full speed before beginning cut. Using the front
of the shoe as a hinge point, gradually lower
the back end of the saw into the workpiece.
Release the lower guard lever and grasp the
front handle.
3. When the shoe rests fl at against workpiece,
advance the saw to the far corner. Release the
trigger and allow the blade to come to a complete
stop before removing it from workpiece. Repeat
the above steps for each side of the opening.
Use a Sawzall
®
reciprocating saw, jig saw or
small hand saw to fi nish the corners if they are
not completely cut through.
MAINTENANCE
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.
WARNING T o 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.
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.
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