MAKITA BGA450 (01) PDF MANUAL

Model	BGA450	BGA452
Wheel diameter	115mm (4-1/2″)
Spindle thread	5/8″
No load speed (RPM)	10,000/min
Overall length	317 mm (12-1/2″)
Net weight*	2.2 kg (4.8 lbs)	2.3 kg (5.0 lbs)
Rated voltage	D.C. 14.4 V	D.C. 18 V
Standard battery cartridge	BL1430	BL1830

*Weight, with battery cartridge, according to EPTA-Procedure 01/2003.

Note: Specifications and battery cartridge may differ from country to country. Due to a continuing program of research and development, these specifications are subject to change without notice.

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

1. Always use proper guard with grinding wheel. A guard protects operator from broken wheel fragments.

2. Accessories must be rated for at least the speed recommended on the tool warning label. Wheels and other accessories running over rated speed can fly apart and cause injury.

3. Hold tool by insulated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring. Contact with a “live” wire will make exposed metal parts of the tool “live” and shock the operator.

4. When using depressed center grinding wheels, be sure to use only fiberglass-reinforced wheels.

5. Always use safety glasses or goggles. Ordinary eye or sun glasses are NOT safety glasses.

6. Check the wheel carefully for cracks or damage before operation. Replace cracked or damaged wheel immediately. Run the tool (with guard) at no load for about a minute, holding tool away from others. If wheel is flawed, it will likely separate during this test.

7. Use only flanges specified for this tool.

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

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

10. Hold the tool firmly.

11. Keep hands away from rotating parts.

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

13. 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 wheel.

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

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

16. Do not leave the tool running. Operate the tool only when hand-held.

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

18. ALWAYS wear proper apparel including long sleeve shirts, leather gloves and shop aprons to protect skin from contact with hot grindings.

19. Use of this tool to grind or sand some products, paints and wood could expose user to dust containing hazardous substances. Use appropriate respiratory protection.

20. NEVER USE Stone Cup type wheels with this grinder. This grinder is not designed for these types of wheels and the use of such a product may result in serious personal injury.

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 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.

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

7. 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.

8. Be careful not to drop or strike battery.

9. Do not use a damaged battery.

10. Follow your local regulations relating to disposal of battery.

1. Charge the battery cartridge before completely discharged.

2. Always stop tool operation and charge the battery cartridge when you notice less tool power.

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

4. 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.

5. Charge the battery cartridge once in every six months if you do not use it for a long period of time.

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

CAUTION: Always switch off the tool before installing or removing the battery cartridge.

CAUTION: Hold the tool and the battery cartridge firmly when installing or removing battery cartridge. Failure to hold the tool and the battery cartridge firmly may cause them to slip off your hands and result in damage to the tool and battery cartridge and a personal injury.

To remove: Slide the battery cartridge from the tool while sliding the button (1) on the front of the cartridge.

To install: Align the tongue on the battery cartridge (3) with the groove in the housing and slip it into place. Insert it all the way until it locks in place with a little click. If you can see the red indicator (2) on the upper side of the button, it is not locked completely.

CAUTION: Always install the battery cartridge fully until the red indicator cannot be seen. If not, it may accidentally fall out of the tool, causing injury to you or someone around you.

CAUTION: Do not install the battery cartridge forcibly. If the cartridge does not slide in easily, it is not being inserted correctly.

The tool is equipped with a battery protection system. This system automatically cuts off power to the motor to extend battery life. The tool will automatically stop during operation if the tool and/or battery are placed under one of the following conditions:

Overloaded: The tool is operated in a manner that causes it to draw an abnormally high current. In this situation, turn the tool off and stop the application that caused the tool to become overloaded. Then turn the tool on to restart. If the tool does not start, the battery is overheated. In this situation, let the battery cool before turning the tool on again.

Low battery voltage: The remaining battery capacity is too low and the tool will not operate. In this situation, remove and recharge the battery.

NOTE: The overheat protection works only with a battery cartridge with a star mark (1).

Indication lamps (1) are located in two positions.

When the battery cartridge is inserted on the tool with the slide switch positioned in the “O (OFF)”, the indication lamp flickers quickly for approximately one second. If it does not flicker so, the battery cartridge or indication lamp may be broken.

Overload protection:

– When the tool becomes 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 situation, move the slide switch to the “O (OFF)” position once. And then move it to the “I (ON)” position again to restart.

Battery cartridge replacing signal:

– When the remaining battery capacity is low, the indicator lamp lights up during operation earlier than that of high battery capacity.

Accidental re-start preventive function:

– Even if the battery cartridge is inserted on the tool with the slide switch in the “I (ON)” position, the tool does not start. In this situation, the lamp flickers slowly. It indicates 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.

CAUTION: Never actuate the shaft lock (1) when the spindle is moving. The tool may be damaged.

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

CAUTION: Before inserting the battery cartridge into the tool, always check to see that the slide switch (1) actuates properly and returns to the “OFF” position when the rear of the slide switch is depressed.

CAUTION: Switch can be locked in “ON” position for ease of operator comfort during extended use. Apply caution when locking tool in “ON” position and maintain firm grasp on tool.

To start: Slide the slide switch toward the “I (ON)” position. For continuous operation, press the front of the slide switch to lock it.

To stop: Press the rear of the slide switch, then slide it toward the “O (OFF)” position.

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

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.

WARNING: When using a depressed center grinding wheel/Multi-disc, flex wheel, wire wheel brush, cut-off wheel or diamond wheel, the wheel guard (1) must be fitted on the tool so that the closed side of the guard always points toward the operator.

To install: Mount the wheel guard with the protrusion on the wheel guard band aligned with the notch on the bearing box (2). Then rotate the wheel guard around 180 degrees. Be sure to tighten the screw (3) securely.

To remove: Follow the installation procedure in reverse.

WARNING: Always use the supplied guard when depressed center grinding wheel/Multi-disc is on tool. Wheel can shatter during use and guard helps to reduce chances of personal injury.

1. Mount the inner flange (3) onto the spindle.

2. Fit the wheel/disc (2) on the inner flange.

3. Screw the lock nut (1) onto the spindle.

4. To tighten the lock nut, press the shaft lock (2) firmly so that the spindle cannot revolve, then use the lock nut wrench (1) and securely tighten clockwise.

To remove: Follow the installation procedure in reverse.

CAUTION: Always install the wheel guard before installing the diamond wheel.

CAUTION: When mounting the wheel ensure that the arrow (indicating the direction of rotation) on the wheel is pointing in the same direction as the arrow for rotation provided on the tool.

1. Mount the inner flange (3) onto the spindle (4) so that the side of the inner flange with the 7/8″ diameter protrusion faces the diamond wheel.

2. Place the diamond wheel (2) onto the inner flange making sure the protrusion fits into the arbor of the wheel.

3. Use the lock nut (1) to secure the wheel by placing it on the spindle so that the flat side faces the wheel and screw the lock nut onto the spindle.

4. 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: Follow the installation procedure in reverse.

WARNING: Always use the supplied guard when flex wheel is on tool. Wheel can shatter during use and guard helps to reduce chances of personal injury.

Follow instructions for depressed center grinding wheel/Multi-disc installation, but also use the plastic pad (3) over the flex wheel (2). See the order of assembly: Inner flange (4), flex wheel (2), plastic pad (3), lock nut (1).

To remove: Follow the installation procedure in reverse.

NOTE: Use sander accessories specified in this manual. These must be purchased separately.

1. Mount the rubber pad (3) onto the spindle.

2. Fit the abrasive disc (2) on the rubber pad.

3. Screw the lock nut (1) onto the spindle.

4. 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: Follow the installation procedure in reverse.

WARNING: 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.

WARNING: ALWAYS replace wheel if tool is dropped while grinding.

WARNING: NEVER bang or hit grinding disc or wheel onto work.

WARNING: Avoid bouncing and snagging the wheel, especially when working corners, sharp edges etc. This can cause loss of control and kickback.

WARNING: 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.

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

CAUTION: 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.

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.

CAUTION: Do not “jam” the wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback, wheel breakage and overheating of the motor may occur.

CAUTION: Do not start the cutting operation in the workpiece. Let the wheel reach full speed and carefully enter into the cut moving the tool forward over the workpiece surface. The wheel may bind, walk up or kickback if the power tool is started in the workpiece.

CAUTION: A diamond wheel shall be operated perpendicular to the material being cut.

CAUTION: Check operation of brush by running tool with no load, insuring that no one is in front of or in line with brush.

CAUTION: Do not use brush that is damaged, or which is out of balance. Use of damaged brush could increase potential for injury from contact with broken brush wires.

1. Remove the battery cartridge from the tool and place it upside down allowing easy access to spindle.

2. Remove any accessories on spindle.

3. Thread wire cup brush (1) onto spindle and tighten with supplied wrench.

4. When using brush, avoid applying too much pressure which causes over bending of wires, leading to premature breakage.

CAUTION: Check operation of wire wheel brush by running tool with no load, insuring that no one is in front of or in line with the wire wheel brush.

CAUTION: Do not use wire wheel brush that is damaged, or which is out of balance. Use of damaged wire wheel brush could increase potential for injury from contact with broken wires.

CAUTION: ALWAYS use guard with wire wheel brushes, assuring diameter of wheel fits inside guard. Wheel can shatter during use and guard helps to reduce chances of personal injury.

1. Remove the battery cartridge from the tool and place it upside down allowing easy access to spindle.

2. Remove any accessories on spindle.

3. Thread wire wheel brush (1) onto spindle and tighten with the wrenches.

4. When using wire wheel brush, avoid applying too much pressure which causes over bending of wires, leading to premature breakage.

WARNING: When using an abrasive cut-off wheel, be sure to use only the special wheel guard (4) designed for use with cut-off wheels.

WARNING: NEVER use cut-off wheel for side grinding.

WARNING: Do not “jam” the wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback, wheel breakage and overheating of the motor may occur.

WARNING: Do not start the cutting operation in the workpiece. Let the wheel reach full speed and carefully enter into the cut moving the tool forward over the workpiece surface. The wheel may bind, walk up or kickback if the power tool is started in the workpiece.

WARNING: During cutting operations, never change the angle of the wheel. Placing side pressure on the cut-off wheel (as in grinding) will cause the wheel to crack and break, causing serious personal injury.

Installation involves: Inner flange (3), Abrasive cut-off wheel (2), Lock nut (1).

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

CAUTION: Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.

The tool and its air vents have to be kept clean. Regularly clean the tool’s air vents (Exhaust vent (1), Inhalation vent (2)) or whenever the vents start to become obstructed.

To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjustment should be performed by Makita Authorized or Factory Service Centers, always using Makita replacement parts.

1. Remove and check the carbon brushes regularly. Replace when they wear down to the limit mark (1).

2. Keep the carbon brushes clean and free to slip in the holders.

3. Both carbon brushes should be replaced at the same time.

4. Use only identical carbon brushes.

5. Insert the top end of a slotted bit screwdriver (2) into the notch in the tool and remove the holder cap cover (1) by lifting it up.

6. Use a screwdriver (2) to remove the brush holder caps (1). Take out the worn carbon brushes, insert the new ones and secure the brush holder caps.

7. Reinstall the holder cap cover on the tool.

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.

CAUTION: Your tool is supplied with a guard for use with a depressed center grinding wheel, multi-disc, diamond wheel, flex wheel and wire wheel brush. A cut-off wheel can also be used with an optional guard. If you decide to use your Makita grinder with approved accessories which you purchase from your Makita distributor or factory service center, be sure to obtain and use all necessary fasteners and guards as recommended in this manual. Your failure to do so could result in personal injury to you and others.

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

• Makita genuine battery and charger

Item	Description
1	Grip 36
2	Wheel guard
3	Inner flange 45
4	4-1/2″ Depressed center grinding wheel/4-1/2″ Multi-disc
5	Lock nut 5/8-45
8	Rubber pad 100
9	Abrasive disc
10	Sanding lock nut 5/8-48
11	Wire wheel brush
12	Wire cup brush
13	Wheel guard (For cut-off wheel)
14	Cut-off wheel / 4-1/2″ Diamond wheel
–	Lock nut wrench 28

NOTE: Some items in the list may be included in the tool package as standard accessories. They may differ from country to country.