Makita 5090D User Manual
Cordless Circular Saw
85 mm (3-3/8”)
MODEL 5090D
INSTRUCTION MANUAL
WARNING:
For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
www.makitatools.com
SPECIFICATIONS
Model 5090D
Blade diameter 85 mm (3-3/8”)
Max. Cutting depth
No load speed (RPM) 1,000/min.
Overall length 313 mm (12-3/8”)
Net weight 1.8 kg (4.0 lbs)
Battery Charger DC9700A
Input A. C. only 50 Hz - 60 Hz
Output D. C. 7.2 V - 9.6 V
Battery Cartridge 9000
Vol tag e 9 .6 V
Charging time 60 min.
• Manufacturer reserves the right to change specifications without notice.
• Specifications may differ from country to country.
at 90° 22 mm (7/8”)
at 45° 18 mm (11/16”)
GENERAL SAFETY RULES
USA003-1
(FOR All BATTERY OPERATED TOOLS)
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
2.
Work A re a
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. Distrac-
tions can cause you to lose control.
Electrical Safety
4.
A battery operated tool with integral batteries or a separate battery pack must be
recharged only with the specified charger
for the battery. A charger that may be suit-
able for one type of battery may create a risk
of fire when used with another battery.
5.
Use battery operated tool only with specifically designated battery pack. Use of any
other batteries may create a risk of fire.
Personal Safety
6.
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.
7.
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.
8.
Avoid accidental starting. Be sure switch
is in the locked or off position before
inserting battery pack. Carrying tools with
your finger on the switch or inserting the battery pack into a tool with the switch on invites
accidents.
9.
Remove adjusting keys or wrenches
before turning the tool on. A wrench or a
key that is left attached to a rotating part of
the tool may result in personal injury.
10.
Do not overreach. Keep proper footing
and balance at all times. Proper footing and
balance enable better control of the tool in
unexpected situations.
11.
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
12.
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.
13.
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.
14.
Do not use tool if switch does not turn it
on or off. A tool that cannot be controlled
with the switch is dangerous and must be
repaired.
15.
Disconnect battery pack from tool or
place the switch in the locked or off position before making any adjustments,
changing accessories, or storing the tool.
Such preventive safety measures reduce the
risk of starting the tool accidentally.
16.
Store idle tools out of reach of children
and other untrained persons. Tools are
dangerous in the hands of untrained users.
17.
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 sparks, burns, or a fire.
18.
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.
19.
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 accidents are
caused by poorly maintained tools.
3
20.
Use only accessories that are recommended by the manufacturer for your
model. Accessories that may be suitable for
one tool may create a risk of injury when
used on another tool.
SERVICE
21.
Tool service must be performed only by
qualified repair personnel. Service or main-
tenance performed by unqualified personnel
may result in a risk of injury.
22.
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
shock or injury.
SPECIFIC SAFETY RULES
USB068-1
DO NOT let comfort or familiarity with product (gained from
repeated use) replace strict adherence to circular saw safety
rules. If you use this tool unsafely or incorrectly, you can suffer
serious personal injury.
1.
DANGER! 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.
Keep your body positioned to either side
of the saw blade, but not in line with the
saw blade. KICKBACK could cause the saw
to jump backwards. (See “Causes and Operator Prevention of Kickback”)
Do not reach underneath the work. The
guard can not protect you from the blade
below the work. Do not attempt to remove cut
material when blade is moving.
CAUTION: Blades coast after turn off. Wait
until blade stops before grasping cut material.
2.
Check lower guard for proper closing
before each use. Do not operate 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 Lever and make sure it moves freely and
does not touch the blade or any other part, in
all angles and depths of cut.
To check lower guard, open lower guard by
hand, then release and watch guard closure.
Also check to see that Retracting Lever does
not touch tool housing. Leaving blade
exposed is VERY DANGEROUS and can
lead to serious personal injury.
3.
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 operate sluggishly due to damaged
parts, gummy deposits, or a buildup of debris.
4.
Lower guard should be Retracted manually only for special cuts such as “Pocket
Cuts” and “Compound Cuts.” Raise lower
guard by retracting Lever. As soon as
blade enters the material, lower guard
must be released. For all other sawing, the
lower guard should operate automatically.
5.
Always observe that the lower guard is
covering the blade before placing saw
down on bench or floor. An unprotected,
coasting blade will cause the saw to walk
backwards, cutting whatever is in its path. Be
4
aware of the time it takes for the blade to stop
after switch is released.
6.
NEVER hold piece being cut in your hands
or across your leg. It is important to support
the work properly to minimize body exposure,
blade binding, or loss of control.
7.
Hold tool by insulated gripping surfaces
when performing an operation where the
cutting tool may contact hidden wiring.
Contact with a “live” wire will also make
exposed metal parts of the tool “live” and
shock the operator.
8.
When ripping always use a rip fence or
straight edge guide. This improves the
accuracy of cut and reduces the chance for
blade binding.
9.
Always use blades with correct size and
shape (diamond vs. round) arbor holes.
Blades that do not match the mounting hardware of the saw will run eccentrically, causing
loss of control.
10.
Never use damaged or incorrect blade
washers or bolts. The blade washers and
bolt were specially designed for your saw, for
optimum performance and safety of operation.
11.
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 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 the 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:
Maintain a firm grip on the saw and position your body and arm in a way that
allows you to resist KICKBACK forces.
KICKBACK forces can be controlled by the
operator, if proper precautions are taken.
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.
When restarting a saw in the workpiece,
center the saw blade in the kerf and check
that 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.
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 as shown in Fig. 1.
To minimize the risk of blade pinching and
kickback. When cutting operation requires
the resting of the saw on the workpiece, the
saw shall be rested on the larger portion and
the smaller piece cut off.
Fig. 1 To avoid kickback, do support board or
panel near the cut.
5
Fig. 2 Do not support board or panel away from
the cut.
Do not use dull or damaged blade.
Unsharpened or improperly set blades produce narrow kerf causing excessive friction,
blade binding and KICKBACK. Keep blade
sharp and clean. Gum and wood pitch hardened on blades slows saw and increases
potential for kickback. Keep blade clean by
first removing it from tool, then cleaning it
with gum and pitch remover, hot water or kerosene. Never use gasoline.
Blade depth and bevel adjusting locking
levers must be tight and secure before
making cut. If blade adjustment shifts while
cutting, it will cause binding and KICKBACK.
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. For pocket cuts,
retract lower guard using Retracting Lever.
ALWAYS hold the tool firmly with both
hands. NEVER place your hand or fingers
behind the saw. If kickback occurs, the saw
could easily jump backwards over your hand,
leading to serious personal injury.
Push the saw forward at a speed so that the
blade cuts without slowing.
12.
Be aware that this tool is always in an
operating condition, because it does not
have to be plugged into an electrical outlet.
13.
Use extra caution when cutting damp
wood, pressure treated lumber, or wood
containing knots. Adjust speed of cut to
maintain smooth advancement of tool without
decrease in blade speed.
14.
Adjustments. Before cutting be sure
depth and bevel adjustments are tight.
15.
Avoid Cutting Nails. Inspect for and
remove all nails from lumber before cutting.
16.
The tool is provided with a front grip
(motor housing) and rear handle for two
hand operation. Operate with proper hand
support and proper workpiece support.
WARNING: It is important to support the
workpiece properly and to hold the saw
firmly to prevent loss of control which
could cause personal injury. Fig. 4 illustrates typical hand support of the saw.
Fig. 3
Never force the saw. Forcing the saw can
cause uneven cuts, loss of accuracy, and
possible kickback.
6
Fig. 4 A typical illustration of proper hand sup-
port and workpiece support.
17.
Place the wider portion of the saw base on
that part of the workpiece which is solidly
supported, not on the section that will fall
off when the cut is made. As examples,
Fig. 5 illustrates the RIGHT way to cut off
the end of a board, and Fig. 6 the WRONG
way. If the workpiece is short or small,
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