Makita BLS820 User Manual

Cordless Compound
Miter Saw

Equipped with Electric Blade Brake
216 mm (8-1/2”)
MODEL BLS820

INSTRUCTION MANUAL

WARNING:

For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.

001764

SPECIFICATIONS

Blade diameter ........................................................................................... 216 mm (8-1/2”)

Hole (arbor) diameter ................................................................................. 15.88 mm (5/8”)

Max. Miter angle ......................................................................................Left 52°, Right 52°

Max. Bevel angle ......................................................................................................Left 45°

Max. Cutting capacities (H x W)

Miter angle

0°

45° (left and right)

0° 45° (left)

61 mm x 122 mm

(2-3/8” x 4-13/16”)

61 mm x 85 mm

(2-3/8” x 3-3/8”)

Bevel angle

45 mm x 122 mm

(1-3/4” x 4-13/16”)

45 mm x 85 mm

(1-3/4” x 3-3/8”)

(Note)

The max. Cutting capacities may vary according to workpiece, blade and/or charging
condition.

No load speed (RPM) .......................................................................................... 2,300/min.

Dimensions (L x W x H) ..................528 mm x 430 mm x 486 mm (20-3/4” x 17” x 19-1/8”)

Net weight ................................................................................................. 10.1 kg (22.3 lbs)

Battery Charger DC24SA DC24SA

Input A.C. only 50 Hz - 60 Hz

Output D.C. 7.2 V - 24 V

Battery Cartridge BH2420 BH2433 BH2420 BH2433

Voltage 24 V

Charging time 30 min. 60 min. 55 min. 90 min.

• Manufacturer reserves the right to change specifications without notice.

• Specifications may differ from country to country.

2

For Your Own Safety Read Instruction Manual
Before Operating Tool
Save it for future reference
GENERAL SAFETY PRECAUTIONS

(For All TOOIS)

1.

KNOW YOUR POWER TOOL. Read the
owner’s manual carefully. Learn the tool’s
applications and limitations, as well as the
specific potential hazards peculiar to it.

2.

KEEP GUARDS IN PLACE and in working
order.

3.

REMOVE ADJUSTING KEYS AND
WRENCHES. Form habit of checking to
see that keys and adjusting wrenches are
removed from tool before turning it on.

4.

KEEP WORK AREA CLEAN. Cluttered
areas and benches invite accidents.

5.

DON’T USE IN DANGEROUS ENVIRON­MENT. Don’t use power tools in damp or
wet locations, or expose them to rain.
Keep work area well lighted. Don’t use
tool in presence of flammable liquids or
gases.

6.

KEEP CHILDREN AWAY. All visitors
should be kept safe distance from work
area.

7.

MAKE WORKSHOP KID PROOF with pad­locks, master switches, or by removing
starter keys.

8.

DON’T FORCE TOOL. It will do the job bet­ter and safer at the rate for which it was
designed.

9.

USE RIGHT TOOL. Don’t force tool or
attachment to do a job for which it was not
designed.

10.

WEAR PROPER APPAREL. Do not wear
loose clothing, gloves, neckties, rings,
bracelets, or other jewelry which may get
caught in moving parts. Nonslip footwear
is recommended. Wear protective hair
covering to contain long hair.

11.

ALWAYS USE SAFETY GLASSES. Also
use face or dust mask if cutting operation
is dusty. Everyday eyeglasses only have
impact resistant lenses, they are NOT
safety glasses.

12.

SECURE WORK. Use clamps or a vise to
hold work when practical. It’s safer than
using your hand and it frees both hands
to operate tool.

13.

DON’T OVERREACH. Keep proper footing
and balance at all times.

14.

MAINTAIN TOOLS WITH CARE. Keep tools
sharp and clean for best and safest perfor­mance. Follow instructions for lubricating
and changing accessories.

15.

DISCONNECT BATTERY FROM TOOL
before servicing; when changing acces­sories such as blades, bits, cutters, and
the like.

16.

REDUCE THE RISK OF UNINTENTIONAL
STARTING. Make sure switch is in off
position before inserting battery.

17.

USE RECOMMENDED ACCESSORIES.
Consult the owner’s manual for recom­mended accessories. The use of improper
accessories may cause risk of injury to
persons.

USA005-1

3

18.

NEVER STAND ON TOOL. Serious injury
could occur if the tool is tipped or if the
cutting tool is unintentionally contacted.

19.

CHECK DAMAGED PARTS. Before further
use of the tool, a guard or other part that
is damaged should be carefully checked
to determine that it will operate properly
and perform its intended function - check
for alignment of moving parts, binding of
moving parts, breakage of parts, mount­ing, and any other conditions that may

affect its operation. A guard or other part
that is damaged should be properly
repaired or replaced.

20.

DIRECTION OF FEED. Feed work into a
blade or cutter against the direction of
rotation of the blade or cutter only.

21.

NEVER LEAVE TOOL RUNNING UNAT­TENDED. TURN POWER OFF. Don’t leave
tool until it comes to a complete stop.

ADDITIONAL SAFETY RULES

USB034-2

DO NOT let comfort or familiarity with product (gained from
repeated use) replace strict adherence to miter saw safety
rules. If you use this tool unsafely or incorrectly, you can suffer
serious personal injury.

1.

Wear eye protection.

2.

Keep hands out of path of saw blade.
Avoid contact with any coasting blade. It
can still cause severe injury.

3.

Do not operate saw without guards in
place. Check blade guard for proper clos­ing before each use. Do not operate saw if
blade guard does not move freely and
close instantly. Never clamp or tie the
blade guard into the open position.

4.

Do not perform any operation freehand.
The workpiece must be secured firmly
against the turn base and guide fence
with a vise during all operations. Never
use your hand to secure the workpiece.

5.

Never reach around saw blade.

6.

Turn off tool and wait for saw blade to
stop before moving workpiece or chang­ing settings.

7.

Remove battery from tool before chang­ing blade or servicing.

8.

Always secure all moving portions before
carrying the tool.

9.

Be aware that this tool is always in an
operating condition, because it does not
have to be plugged into an electrical out­let.

10.

Do not use the tool in the presence of
flammable liquids or gases.

11.

Check the blade carefully for cracks or
damage before operation. Replace
cracked or damaged blade immediately.

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 to clean blade.

12.

Use only flanges specified for this tool.

13.

Be careful not to damage the arbor,
flanges (especially the installing surface)
or bolt. Damage to these parts could
result in blade breakage.

4

14.

Make sure that the turn base is properly
secured so it will not move during opera­tion. Use the holes in the base to fasten
the saw to a stable work platform or
bench. NEVER use tool where operator
positioning would be awkward.

15.

For your safety, remove the chips, small
pieces, etc. from the table top before oper­ation.

16.

Avoid cutting nails. Inspect for and
remove all nails from the workpiece
before operation.

17.

Make sure the shaft lock is released
before the switch is turned on.

18.

Be sure that the blade does not contact
the turn base in the lowest position.

19.

Hold the handle firmly. Be aware that the
saw moves up or down slightly during
start-up and stopping.

20.

Make sure the blade is not contacting the
workpiece before the switch is turned on.

21.

Before using the tool on an actual work­piece, let it run for a while. Watch for
vibration or wobbling that could indicate
poor installation or a poorly balanced
blade.

22.

Wait until the blade attains full speed
before cutting.

23.

Stop operation immediately if you notice
anything abnormal.

24.

Do not attempt to lock the trigger in the on
position.

25.

Be alert at all times, especially during
repetitive, monotonous operations. Do
not be lulled into a false sense of security.
Blades are extremely unforgiving.

26.

Always use accessories recommended in
this manual. Use of improper accessories
such as abrasive wheels may cause an
injury.

27.

NEVER hold workpiece on right side of
blade with left hand or vice versa. This is
called cross-armed cutting and exposes
user to risk of SERIOUS PERSONAL
INJURY as shown in the figure. ALWAYS
use vise to secure workpiece.

28.

NEVER stack workpieces on the table top
to speed cutting operations. Cut only one
piece at a time.

29.

Some material contains chemicals which
may be toxic. Take caution to prevent dust
inhalation and skin contact. Follow mate­rial supplier safety data.

SAVE THESE INSTRUCTIONS

WARNING:

MISUSE or failure to follow the safety rules stated in this
instruction manual may cause serious personal injury.

5

IMPORTANT SAFETY INSTRUCTIONS FOR
CHARGER & BATTERY CARTRIDGE

1.

SAVE THESE INSTRUCTIONS- This man­ual contains important safety and operat­ing instructions for battery charger.

2.

Before using battery charger, read all
instructions and cautionary markings on
(1) battery charger, (2) battery, and (3)
product using battery.

3.

CAUTION - To reduce risk of injury, charge
only MAKITA rechargeable batteries
marked on the charger label. Other types
of batteries may burst causing personal
injury and damage.

4.

Do not expose charger to rain or snow.

5.

Use of an attachment not recommended
or sold by the battery charger manufac­turer may result in a risk of fire, electric
shock, or injury to persons.

Table 1: RECOMMENDED MINIMUM AWG SIZE FOR EXTENSION CORDS FOR BATTERY CHARGERS

Length of Cord (Feet) 25 50 100 150

AWG Size of Cord 18 18 18 16

9.

Do not operate charger with damaged
cord or plug - replace them immediately.

10.

Do not operate charger if it has received a
sharp blow, been dropped, or otherwise
damaged in any way; take it to a qualified
serviceman.

11.

Do not disassemble charger or battery
cartridge; take it to a qualified serviceman
when service or repair is required. Incor­rect reassembly may result in a risk of
electric shock or fire.

12.

To reduce risk of electric shock, unplug
charger from outlet before attempting any
maintenance or cleaning. Turning off con­trols will not reduce this risk.

6.

To reduce risk of damage to electric plug
and cord, pull by plug rather than cord
when disconnecting charger.

7.

Make sure cord is located so that it will
not be stepped on, tripped over, or other­wise subjected to damage or stress.

8.

An extension cord should not be used
unless absolutely necessary. Use of
improper extension cord could result in a
risk of fire and electric shock. If extension
cord must be used, make sure:

a.

That pins on plug of extension cord
are the same number, size, and shape
as those of plug on charger;

b.

That extension cord is properly wired
and in good electrical condition; and

c.

That wire size is at least as large as
the one specified in the table below.

13.

The battery charger is not intended for
use by young children or infirm persons
without supervision.

14.

Young children should be supervised to
ensure that they do not play with the bat­tery charger.

15.

If operating time has become excessively
shorter, stop operating immediately. It
may result in a risk of overheating, possi­ble burns and even an explosion.

16.

If electrolyte gets into your eyes, rinse
them out with clear water and seek medi­cal attention right away. It may result in
loss of your eyesight.

USC002-3

6

ADDITIONAL SAFETY RULES FOR CHARGER &
BATTERY CARTRIDGE

1.

Do not charge Battery Cartridge when
temperature is BELOW 10°C (50°F) or
ABOVE 40°C (104°F).

2.

Do not attempt to use a step-up trans­former, an engine generator or DC power
receptacle.

3.

Do not allow anything to cover or clog the
charger vents.

4.

Do not short the battery cartridge:

(1)

Do not touch the terminals with any
conductive material.

(2)

Avoid storing battery cartridge in a
container with other metal objects
such as nails, coins, etc.

(3)

Do not expose battery cartridge to
water or rain.

A battery short can cause a large current
flow, overheating, possible burns and
even a breakdown.

5.

Do not store the tool and Battery Car­tridge in locations where the temperature
may reach or exceed 50°C (122°F).

6.

Do not incinerate the Battery Cartridge
even if it is severely damaged or is com­pletely worn out. The battery cartridge can
explode in a fire.

7.

Be careful not to drop, shake or strike bat­tery.

8.

Do not charge inside a box or container of
any kind. The battery must be placed in a
well ventilated area during charging.

SAVE THESE INSTRUCTIONS

SYMBOLS

The following show the symbols used for the charger. Be sure that you understand their
meaning before use.

.......... Ready to charge

............. Charging

............. Charging complete

...........Delay charge (Cooling)

........Defective battery

....Conditioning

...........Cooling abnormality

7

INSTALLATION

1

23

1. Base

2. Hex bolt

3. Auxiliary plate

12

34

1. Auxiliary plate

2. Base

3. Hex bolt

4. Nut

1

001823

Installing auxiliary plate

Installing the auxiliary plate using the notch in the tool’s base
and secure it by tightening the hex bolt.

001832

Bench mounting

001847

When the tool is shipped, the handle is locked in the lowered
position by the stopper pin. Release the stopper pin by lower­ing the handle slightly and pulling the stopper pin.

1. Stopper pin

1. Bolt

8

001857

This tool should be bolted with two bolts to a level and stable
surface using the bolt holes provided in the tool’s base. This
will help prevent tipping and possible injury.

1

FUNCTIONAL
DESCRIPTION

3

1

1. Button

2. Battery cartridge

3. Red part

1

1. Terminal cover

2. Battery cartridge

3. Charging light

4. Battery charger

2

001803

001336

2

3

4

CAUTION:

• Always be sure that the tool is switched off and the
battery cartridge is removed before adjusting or
checking function on the tool.

Installing or removing battery cartridge

• Always switch off the tool before insertion or removal of
the battery cartridge.

• To remove the battery cartridge, withdraw it from the tool
while sliding the button on the side of the cartridge.

• To insert the battery cartridge, align the tongue on the
battery cartridge with the groove in the housing and slip
it into place. Always insert it all the way until it locks in
place with a little click. If you can see the red part on the
upper side of the button, it is not locked completely.
Insert it fully until the red part cannot be seen. If not, it
may accidentally fall out of the tool, causing injury to you
or someone around you.

• Do not use force when inserting the battery cartridge. If
the cartridge does not slide in easily, it is not being
inserted correctly.

Charging

1. Plug the battery charger into the proper AC voltage
source. Two charging lights will flash in green color
repeatedly.

2. Insert the battery cartridge into charger until it stops
adjusting to the guide of charger. Terminal cover of
charger can be opened with inserting and closed with
pulling out the battery cartridge.

3. When the battery cartridge is inserted, the charging light
color will change from green to red and charging will
begin. The charging light will keep lighting up lit steadily
during charging. One red charging light indicates
charged condition in 0 - 80% and two red ones indicates
80 - 100%.

4. With finish of charge, the charging lights will change
from two red ones to two green ones.

9

5. If you leave the battery cartridge in the charger after the
charging cycle is complete, the charger will switch into
its “ trickle charge (maintenance charge)” mode which
will last approximately 24 hours.

6. After charging, unplug the charger from the power
source.

NOTE:

• The battery charger is for charging Makita battery
cartridge. Never use it for other purposes or for other
manufacturer’s batteries.

• When you charge a new battery cartridge or a battery
cartridge which has not been used for a long period of
time, it may not accept a full charge. This is a normal
condition and does not indicate a problem. You can
recharge the battery cartridge fully after discharging it
completely and recharging a couple of times.

• If you charge a battery cartridge from a just operated tool
or battery cartridge which has been left in a location
exposed to direct sunlight for a long time, the charging
light may flash in red color. If this occurs, wait for a while.
Charging will begin after the battery cartridge is cooled
by the cooling fan installed in the charger. (DC24SA
only) When the temperature on battery is more than
approx. 70°C, two charging lights may flash in red color,
and when approx. 50°C - 70°C, one charging light in red
color.

• If the charging light flashes alternately in green and red
color, charging is not possible. The terminals on the
charger or battery cartridge are clogged with dust or the
battery cartridge is worn out or damaged.

Cooling system (DC24SA only)

• This charger is equipped with cooling fan for heated
battery in order to enable the battery to prove its own
performance. Sound of cooling air comes out during
cooling, which means no trouble on the charger.

• Yellow light will flash for warning in the following cases.

- Trouble on cooling fan

- Incomplete cool down of battery, such as, being
clogged with dust
The battery can be charged in spite of the yellow
warning light. But the charging time will be longer than
usual in this case.

10

• Check the sound of cooling fan, vent on the charger and
battery, which can be sometime clogged with dust.

• The cooling system is in order although no sound of
cooling fan comes out, if the yellow warning light will not
flash.

• Always keep clean the vent on charger and battery for
cooling.

• The products should be sent to repair or maintenance, if
the yellow warning light will frequently flash.

Conditioning charge (DC24SA only)

Conditioning charge can extend the life of battery by auto­matically searching the optimum charging condition for the
batteries in every situations.

The battery employed in the following conditions repeatedly,
will be worn out shortly, and yellow warning light may flash.

1. Recharge of battery with its high temperature

2. Recharge of battery with its low temperature

3. Recharge of full charged battery

4. Over-discharge of battery (continue to discharge battery
in spite of down of power.)

The charging time of such battery is longer than usual.

Trickle charge (Maintenance charge)

If you leave the battery cartridge in the charger to prevent
spontaneous discharging after full charge, the charger will
switch into its “trickle charge (maintenance charge)” mode
and keep the battery cartridge fresh and fully charged.

Tips for maintaining maximum battery life

1. Charge the battery cartridge before completely dis­charged.
Always stop tool operation and charge the battery car­tridge when you notice less tool power.

2. Never recharge a fully charged battery cartridge.
Overcharging shortens the battery service life.

3. Charge the battery cartridge with room temperature at
10°C - 40°C (50°F - 104°F).
Let a hot battery cartridge cool down before charging it.

4. Charge the Nickel Metal Hydride battery cartridge when
you do not use it for more than six months.

11