Makita BGA452RFE, BGA452, BGA450 User Manual

ENGLISH

Cordless Angle
Grinder

MODEL BGA450
MODEL BGA452

INSTRUCTION MANUAL

WARNING:

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

007214

SPECIFICATIONS

Model BGA450 BGA452

Wheel diameter 115 mm

Spindle thread M14

No load speed (min-1)

Overall length 317 mm

Net weight 1.9 kg

Rated voltage D.C. 14.4V D.C. 18V

• Due to our continuing programme of research and development, the specifications herein are subject to change
without notice.

• Note: Specifications may differ from country to country.

END002-1

Symbols

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

.....................Wear safety glasses.

..................Only for EU countries

Do not dispose of electric equipment
together with household waste
material!
In observance of European Directive
2002/96/EC on waste electric and
electronic equipment and its
implementation in accordance with
national law, electric equipment that
have reached the end of their life
must be collected separately and

For European countries only

Noise and Vibration

The typical A-weighted sound pressure level is 75 dB (A).
Uncertainty is 3 dB(A).
The noise level under working may exceed 85 dB (A).
Wear ear protection.
The typical weighted root mean square acceleration
value is 3 m/s

2

These values have been obtained according to
EN60745.

EC-DECLARATION OF CONFORMITY

We declare under our sole responsibility that this prod­uct is in compliance with the following standards of
standardized documents;

EN60745, EN55014 in accordance with Council Direc­tives, 89/336/EEC, 98/37/EC.

returned to an environmentally
compatible recycling facility.

Intended use

The tool is intended for grinding, sanding and cutting of
metal and stone materials without the use of water.

MAKITA INTERNATIONAL EUROPE LTD.

Michigan Drive, Tongwell, Milton Keynes, Bucks MK15
8JD, ENGLAND

Responsible manufacturer:
Makita Corporation Anjo Aichi Japan

10,000

.

Yasuhiko Kanzaki CE2006

Director

2

GENERAL SAFETY RULES GEA002-3

WARNING:

Read all instructions. Failure to follow all instructions listed below may result in

electric shock, fire and/or serious injury. The term “power tool” in all of the
warnings listed below refers to your mains-operated (corded) power tool or
battery-operated (cordless) power tool.

SAVE THESE INSTRUCTIONS.

Wor k a rea sa fet y

1. Keep work area clean and well lit. Cluttered and

dark areas invite accidents.

2. Do not operate power tools in explosive atmo-

spheres, such as in the presence of flammable
liquids, gases or dust. Power tools create sparks

which may ignite the dust or fumes.

3. Keep children and bystanders away while oper-

ating a power tool. Distractions can cause you to

lose control.

Electrical safety

4. 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. Unmodified plugs and matching outlets will

reduce risk of electric shock.

5. 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.

6. Do not expose power tools to rain or wet condi-

tions. Water entering a power tool will increase the

risk of electric shock.

7. 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.

8. 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.

Personal safety

9. 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 influence of drugs, alcohol or medication. A

moment of inattention while operating power tools
may result in serious personal injury.

10. Use safety equipment. Always wear eye protec­tion. Safety equipment such as dust mask, non-skid

safety shoes, hard hat, or hearing protection used
for appropriate conditions will reduce personal inju­ries.

11. Avoid accidental starting. Ensure the switch is
in the off-position before plugging in. Carrying

power tools with your finger on the switch or plug­ging in power tools that have the switch on invites
accidents.

12. 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.

13. Do not overreach. Keep proper footing and bal­ance at all times. This enables better control of the

power tool in unexpected situations.

14. Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing, and gloves
away from moving parts. Loose clothes, jewellery

or long hair can be caught in moving parts.

15. If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used. Use of

these devices can reduce dust-related hazards.

Power tool use and care

16. 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.

17. 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.

18. 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.

3

19. 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.

20. Maintain power tools. Check for misalignment
or binding of moving parts, breakage of parts
and any other condition that may affect the
power tools operation. If damaged, have the
power tool repaired before use. Many accidents

are caused by poorly maintained power tools.

21. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.

22. Use the power tool, accessories and tool bits
etc. in accordance with these instructions and
in the manner intended for the particular type of
power tool, 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.

Battery tool use and care

23. Ensure the switch is in the off position before
inserting battery pack. Inserting the battery pack

into power tools that have the switch on invites acci­dents.

24. Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one

type of battery pack may create a risk of fire when
used with another battery pack.

25. Use power tools only with specifically desig­nated battery packs. Use of any other battery

packs may create a risk of injury and fire.

26. 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 fire.

27. Under abusive conditions, liquid may be ejected
from the battery, avoid contact. If contact acci­dentally occurs, flush with water. If liquid con­tacts eyes, additionally seek medical help. Liquid

ejected from the battery may cause irritation or
burns.

Service

28. Have your power tool serviced by a qualified
repair person using only identical replacement
parts. This will ensure that the safety of the power

tool is maintained.

29. Follow instruction for lubricating and changing
accessories.

30. Keep handles dry, clean and free from oil and
grease.

ENB099-1

ADDITIONAL SAFETY RULES

1. Always use eye and ear protection. Other per­sonal protective equipment such as dust mask,
gloves, helmet and apron should be worn.

2. Keep guards in place.

3. Use only wheels with correct size and wheels
having a maximum operating speed at least as
high as the highest No Load Speed marked on
the tool’s nameplate. When using depressed
center wheels, be sure to use only fiberglass­reinforced wheels.

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

5. Observe the instructions of the manufacturer
for correct mounting and use of wheels. Handle
and store wheels with care.

6. Do not use separate reducing bushings or
adaptors to adapt large hole abrasive wheels.

7. Use only flanges specified for this tool.

8. Do not damage the spindle, the flange (espe­cially the installing surface) or the lock nut.
Damage to these parts could result in wheel
breakage.

9. For tools intended to be fitted with threaded
hole wheel, ensure that the thread in the wheel
is long enough to accept the spindle length.

10. Before using the tool on an actual workpiece,
test run the tool at the highest no load speed
for at least 30 seconds in a safe position. Stop
immediately if there is any vibration or wob­bling that could indicate poor installation or a
poorly balanced wheel. Check the tool to deter­mine the cause.

11. Check that the workpiece is properly sup­ported.

12. Hold the tool firmly.

13. Keep hands away from rotating parts.

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

15. Use the specified surface of the wheel to per­form the grinding.

16. Do not use cutting off wheel for side grinding.

17. Watch out for flying sparks. Hold the tool so
that sparks fly away from you and other per­sons or flammable materials.

18. Pay attention that the wheel continues to rotate
after the tool is switched off.

19. Do not touch the workpiece immediately after
operation; it may be extremely hot and could
burn your skin.

4

20. Do not use the tool on any materials containing
asbestos.

21. Do not use water or grinding lubricant.

22. When use cut-off wheel, always work with the
dust collecting wheel guard required by
domestic regulation.

23. Cutting discs must not be subjected to any lat­eral pressure.

SAVE THESE INSTRUCTIONS.

ENC007-2

IMPORTANT SAFETY
INSTRUCTIONS

FOR BATTERY CARTRIDGE

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

2. Do not disassemble battery cartridge.

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

4. 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.

5. Do not short the battery cartridge:
(1) Do not touch the terminals with any con-

ductive material.

(2) Avoid storing battery cartridge in a con-

tainer 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

6. Do not store the tool and battery cartridge in

7. Do not incinerate the battery cartridge even if it

8. Be careful not to drop or strike battery.

even a breakdown.

locations where the temperature may reach or
exceed 50°C (122°F).

is severely damaged or is completely worn out.
The battery cartridge can explode in a fire.

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.

SAVE THESE INSTRUCTIONS.

Tips for maintaining maximum battery life

1. Charge the battery cartridge before completely
discharged.

5

FUNCTIONAL
DESCRIPTION

1

2

1. Button

2. Red part

3. Battery cartridge

1

1. Shaft lock

CAUTION:

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

007215

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 front 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

3

007216

007217

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.

Shaft lock

CAUTION:

• Never actuate the shaft lock when the spindle is moving. The tool may be
damaged.

Press the shaft lock to prevent spindle rotation when installing or removing
accessories.

Switch action

1. Slide switch

6

1

CAUTION:

• Before inserting the battery cartridge into the tool, always check to see
that the slide switch actuates properly and returns to the “OFF” position
when the rear of the slide switch is depressed.

To start the tool, slide the slide switch toward the “I (ON)” position. For contin­uous operation, press the front of the slide switch to lock it.
To stop the tool, press the rear of the slide switch, then slide it toward the “O
(OFF)” position.

1

1. Indication lamp

007224

Indication lamp with multi function

Indication lamps are located in two positions.
When the battery cartridge is inser ted on the tool with the slide switch posi-

tioned in the “O (OFF)” position, the indication lamp flickers quickly for approx­imately one second. If it does not flicker so, the battery cartridge or indication
lamp has broken.

- Overload protection

- When the tool is overloaded, the indication lamp lights up. When the

load on the tool is reduced, the lamp goes out.

- If the tool continues to be overloaded and the indication lamp

continues to light up for approximately two seconds, the tool stops.
This prevents the motor and its related parts from being damaged.

- In this case, to start the tool again, move the slide switch to the “O

(OFF)” position once and then to the “I (ON)” position.

- Battery cartridge replacing signal

- When the remaining battery capacity gets small, the indicator lamp

lights up during operation earlier than enough capacity battery use.

- Accidental re-start preventive function

- Even if the battery car tridge is inserted on the tool with the slide

switch in the “I (ON)” position, the tool does not start. At this time, the
lamp flickers slowly and this shows that the accidental re-start
preventive function is at work.

- To start the tool, first slide the slide switch toward the “O (OFF)”

position and then slide it toward the “I (ON)” position.

ASSEMBLY

1. Wheel guard

2. Bearing box

3. Screw

007225

007218

1

2
3

CAUTION:

• Always be sure that the tool is switched off and the battery cartridge is
removed before carrying out any work on the tool.

Installing side grip (handle)

CAUTION:

• Always be sure that the side grip is installed securely before operation.

Screw the side grip securely on the position of the tool as shown in the figure.

Installing or removing wheel guard

CAUTION:

• When using a depressed center grinding wheel/Multi-disc, flex wheel,
wire wheel brush, cut-off wheel or diamond wheel, the wheel guard must
be fitted on the tool so that the closed side of the guard always points
toward the operator.

Mount the wheel guard with the protrusion on the wheel guard band aligned
with the notch on the bearing box. Then rotate the wheel guard around 180
degrees. Be sure to tighten the screw securely.

To remove wheel guard, follow the installation procedure in reverse.

7

007219

1

2

3

1. Lock nut

2. Depressed center grinding wheel/
Multi-disc

3. Inner flange

007220

1

2

1. Lock nut wrench

2. Shaft lock

007239

1

3

2

4

1. Lock nut

2. Diamond wheel

3. Inner flange

4. Spindle

Installing or removing depressed center grinding wheel/Multi­disc

WAR NI NG:

• Always use supplied guard when depressed center grinding wheel/Multi­disc is on tool. Wheel can shatter during use and guard helps to reduce
chances of personal injury.

Mount the inner flange onto the spindle. Fit the wheel/disc on the inner flange
and screw the lock nut onto the spindle.

To tighten the lock nut, press the shaft lock firmly so that the spindle cannot
revolve, then use the lock nut wrench and securely tighten clockwise.

To remove the wheel, follow the installation procedure in reverse.

Installing or removing diamond wheel (optional accessory)

CAUTION:

• Make sure that the arrow on the tool should point in the same direction
as the arrow on the diamond wheel.

Mount the inner flange onto the spindle. Fit the diamond wheel on over the
inner flange and screw the lock nut onto the spindle. Notice that flat side of the
lock nut should face the diamond wheel in case the diamond wheel is used.

WAR NI NG:

Only actuate the shaft lock when the spindle is not moving.

8

OPERATION

A

B

WAR NI NG:

• It should never be necessary to force the tool. The weight of the tool
applies adequate pressure. Forcing and excessive pressure could cause
dangerous wheel breakage.

• ALWAYS replace wheel if tool is dropped while grinding.

• NEVER bang or hit grinding disc or wheel onto work.

• Avoid bouncing and snagging the wheel, especially when working

corners, sharp edges etc. This can cause loss of control and kickback.

• NEVER use tool with wood cutting blades and other sawblades. Such
blades when used on a grinder frequently kick and cause loss of control
leading to personal injury.

CAUTION:

• Make the depth of a single cut up to 5 mm. Adjust pressure on the tool so
that the tool does not slow down during the operation.

• After operation, always switch off the tool and wait until the wheel has
come to a complete stop before putting the tool down.

• If the tool is operated continuously until the battery cartridge has
discharged, allow the tool to rest for 15 minutes before proceeding with a
fresh battery.

007221

Grinding and sanding operation

ALWAYS hold the tool firmly with one hand on housing and the other on the
side handle. Turn the tool on and then apply the wheel or disc to the work­piece.
In general, keep the edge of the wheel or disc at an angle of about 15 degrees
to the workpiece surface.
During the break-in period with a new wheel, do not work the grinder in the B
direction or it will cut into the workpiece. Once the edge of the wheel has been
rounded off by use, the wheel may be worked in both A and B direction.

Operation with diamond wheel (accessory )

WAR NI NG:

• Forcing and exerting excessive pressure or allowing the wheel to bend,
pinch or twist in the cut can cause overheating of the motor and
dangerous kickback of the tool.

CAUTION:

• After cutting operation, make sure that the diamond wheel stops
revolving completely. Then, place the tool. It is dangerous to place the
tool before turning off the tool. If there are dust or dirt around the tool, the
tool may suck in them.

Be sure that the wheel does not contact the workpiece. Turn the tool on and
hold the tool firmly. Wait until the wheel attains full speed. Now simply move
the tool forward over the workpiece surface, keeping it flat and advancing
smoothly until the cutting is completed.

9

MAINTENANCE

1

2

1. Exhaust vent

2. Inhalation vent

1. Limit mark

007222

CAUTION:

• Always be sure that the tool is switched off and the battery cartridge is
removed before attempting to perform inspection or maintenance.

The tool and its air vents have to be kept clean. Regularly clean the tool’s air
vents or whenever the vents start to become obstructed.

001145

Replacing carbon brushes

Remove and check the carbon brushes regularly. Replace when they wear
down to the limit mark. Keep the carbon brushes clean and free to slip in the
holders. Both carbon brushes should be replaced at the same time. Use only
identical carbon brushes.

1

Insert the top end of slotted bit screwdriver into the notch in the tool and

007226

remove the holder cap cover by lifting it up.

1

1. Holder cap cover

2. Screwdriver

1

2

1. Brush holder cap

2. Screwdriver

10

2

007223

Use a screwdriver to remove the brush holder caps. Take out the worn carbon
brushes, insert the new ones and secure the brush holder caps.

Reinstall the holder cap cover on the tool.
To maintain product SAFETY and RELIABILITY, repairs, any other mainte-

nance or adjustment should be performed by Makita Authorized Service Cent­ers, always using Makita replacement parts.

ACCESSORIES

CAUTION:

• These accessories or attachments are recommended for use with your Makita tool specified in this manual. The
use of any other accessories or attachments might present a risk of injury to persons. Only use accessory or
attachment for its stated purpose.

If you need any assistance for more details regarding these accessories, ask your local Makita Service Center.

• Wheel guard (Wheel cover)

• Inner flange

• 115 mm Depressed center wheels

• Lock nut (For depressed center wheel)

• Rubber pad

• Abrasive discs

• Lock nut (For abrasive disc)

• Lock nut wrench

• Wire cup brush

• Wire bevel brush 85

• Side grip

• Dust collecting wheel guard

• 115 mm Diamond wheel

• Various type of Makita genuine batteries and

chargers

11

884662A226

Makita Corporation Anjo, Aichi, Japan