Makita GA7050, GA7050R, GA9050, GA9050R User Manual

INSTRUCTION MANUAL

MANUEL D'INSTRUCTION

MANUAL DE INSTRUCCIONES

Angle Grinder

Meuleuse d'Angle

Esmeriladora Angular

GA7050

GA7050R

GA9050

GA9050R

010638

DOUBLE INSULATION

DOUBLE ISOLATION

DOBLE AISLAMIENTO

IMPORTANT: Read Before Using.

IMPORTANT: Lire avant usage.

IMPORTANTE: Leer antes de usar.

ENGLISH (Original instructions)

SPECIFICATIONS

Model	GA7050	GA7050R	GA9050	GA9050R
Wheel diameter	180 mm (7")	180 mm (7")	230 mm (9")	230 mm (9")
Spindle thread	15.87mm (5/8")	15.87mm (5/8")	15.87mm (5/8")	15.87mm (5/8")
No load speed (RPM)	8,500/min	8,500/min	6,600/min	6,600/min
Overall length	432 mm (17")	455 mm (17-7/8")	432 mm (17")	455 mm (17-7/8")
Net weight	4.5 kg (9.9 lbs)	4.6 kg (10.1 lbs)	4.7 kg (10.4 lbs)	4.8 kg (10.6 lbs)

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

•Specifications may differ from country to country.

•Weight according to EPTA-Procedure 01/2003

USA002-2

GENERAL SAFETY RULES

(For All 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.

Work Area

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. Distractions can cause you to lose control.

Electrical Safety

4.Double insulated tools are equipped with a polarized plug ( one blade is wider than the other.) This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install a polarized outlet. Do not change the plug in any way. Double insulation eliminates the need for the three wire grounded power cord and grounded power supply system.

5.Avoid body contact with grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is grounded.

6.Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.

7.Do not abuse the cord. Never use the cord to carry the tools or pull the plug from an outlet.

Keep cord away from heat, oil, sharp edges or moving parts. Replace damaged cords immediately. Damaged cords increase the risk of electric shock.

8.When operating a power tool outside, use an outdoor extension cord marked "W-A" or "W".

These cords are rated for outdoor use and reduce 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 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.

10.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.

11.Avoid accidental starting. Be sure switch is off before plugging in. Carrying tools with your finger on the switch or plugging in tools that have the switch on invites accidents.

12.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.

13.Do not overreach. Keep proper footing and balance at all times. Proper footing and balance enables better control of the tool in unexpected situations.

14.Use safety equipment. Always wear eye protection. Dust mask, non-skid safety shoes, hard hat, or hearing protection must be used for

appropriate conditions. Ordinary eye or sun glasses are NOT eye protection.

Tool Use and Care

15.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

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unstable and may lead to loss of control.

16.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.

17.Do not use tool if switch does not turn it on or off. Any tool that cannot be controlled with the switch is dangerous and must be repaired.

18.Disconnect the plug from the power source before making any adjustments, changing accessories, or storing the tool. Such preventive safety measures reduce the risk of starting the tool accidentally.

19.Store idle tools out of reach of children and other untrained persons. Tools are dangerous in the hands of untrained users.

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

21.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.

22.Use only accessories that are recommended by the manufacturer for your model.

Accessories that may be suitable for one tool, may

become hazardous when used on another tool.

Service

23.Tool service must be performed only by qualified repair personnel. Service or maintenance performed by unqualified personnel could result in a risk of injury.

24.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 electric shock or injury.

USE PROPER EXTENSION CORD. Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. Table 1 shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage number, the heavier the cord.

Table 1: Minimum gage for cord

Ampere Rating		Volts		Total length of cord in feet
		120 V	25 ft.		50 ft.	100 ft.		150 ft.
More Than	Not More Than				AWG
0	6		18		16	16		14
6	10		18		16	14		12
10	12		16		16	14		12
12	16		14		12	Not Recommended

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USB005-5

SPECIFIC SAFETY RULES

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 or its own cord.

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.

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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 cord is clear of wheel. Do not wrap cord around your arm or wrist. If control of tool is lost, cord may become wrapped around you and cause personal injury.

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

14.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.

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

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

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

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

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

20.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.

21.After using the tool, make sure the wheel rotation comes to a complete stop before setting the tool down. Setting the tool down with the wheel rotating can cause personal injury.

22.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.

SAVE THESE INSTRUCTIONS.

WARNING:

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

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Symbols

The followings show the symbols used for tool.

volts

amperes

hertz

alternating current

alternating or direct current

no load speed

Class II Construction

revolutions or reciprocation per minute

FUNCTIONAL DESCRIPTION

CAUTION:

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

Shaft lock

CAUTION:

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

1. Shaft lock

1

010639

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

Switch action

CAUTION:

•Before plugging in the tool, always check to see that the switch trigger actuates properly and returns to the "OFF" position when released.

•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.

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			1. Switch trigger
			2. Lock lever
		B	1
			2
	A	C
	010640

For tool with the lock-on switch

To start the tool, simply pull the switch trigger (in the B direction). Release the switch trigger to stop. For continuous operation, pull the switch trigger (in the B direction) and then push in the lock lever (in the A direction). To stop the tool from the locked position, pull the switch trigger fully (in the B direction), then release it.

For tool with the lock-off switch

To prevent the switch trigger from accidentally pulled, a lock lever is provided.

To start the tool, push in the lock lever (in the A direction) and then pull the switch trigger (in the B direction). Release the switch trigger to stop.

For tool with the lock on and lock-off switch

To prevent the switch trigger from accidentally pulled, a lock lever is provided.

To start the tool, push in the lock lever (in the A direction) and then pull the switch trigger (in the B direction). Release the switch trigger to stop.

For continuous operation, push in the lock lever (in the A direction), pull the switch trigger (in the B direction) and then pull the lock lever (in the C direction).

To stop the tool from the locked position, pull the switch trigger fully (in the B direction), then release it.

Indication lamp (For model GA7050R/GA9050R)

1	1. Indication lamp

010864

The indication lamp lights up green when the tool is plugged. If the indication lamp does not light up, the mains cord or the controller may be defective. The indication lamp is lit but the tool does not start even if the tool is switched on, the carbon brushes may be worn out, or the controller, the motor or the ON/OFF switch may be defective.

Unintentional restart proof

Even locking lever keeping the switch trigger depressed (Lock-on position) does not allow the tool to restart even

when the tool is plugged.

At this time, the indication lamp flickers red and shows the unintentional restart proof device is on function.

To cancel the unintentional restart proof, pull the switch trigger fully, then release it.

Soft start feature

These models begin to run slowly when they are turned on. This soft start feature assures smoother operation.

ASSEMBLY

CAUTION:

•Always be sure that the tool is switched off and unplugged 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.

010642

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

Installing or removing wheel guard (For depressed center wheel , multi disc , wire wheel brush )

WARNING:

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

the operator.

For tool with locking screw type wheel guard

	1	1. Wheel guard
		2.	Bearing box
	2	3.	Screw
		3

010643

5

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 counterclockwise. Be sure to tighten the screw securely. To remove wheel guard, follow the installation procedure in reverse.

For tool with clamp lever type wheel guard

1			1. Wheel guard
			2.	Bearing box
2	3		3.	Nut
		4	4.	Lever

	010644
	1	1.	Nut
		2.	Lever
	2

010645

Loosen the lever on the wheel guard. 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 to the position shown in the figure. Tighten the lever to fasten the wheel guard. If the lever is too tight or too loose to fasten the wheel guard, loosen or tighten the nut to adjust the tightening of the wheel guard band.

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

Installing or removing depressed center grinding wheel/Multi-disc (accessory)

WARNING:

•Always use 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	1.	Lock nut
		2.	Depressed
	2
			center grinding
	3		wheel/Multi-disc
		3. Inner flange

010656

Mount the inner flange onto the spindle. Fit the wheel/disc on the inner flange and screw the lock nut with its protrusion facing downward (facing toward the wheel).

WARNING:

•Never use a more than 6.5 mm thick grinding wheel.

NOTE:

•In countries other than United States and Canada, Inner flange 45 can be also used.

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.

	1	1.	Lock nut wrench
		2.	Shaft lock

2

010647

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

Installing or removing flex wheel (optional accessory)

WARNING:

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

	1	1.	Lock nut
		2.	Flex wheel
	2
		3.	Plastic pad
	3
		4. Inner flange
	4

010657

Follow instructions for depressed center grinding wheel/Multi-disc but also use plastic pad over wheel. See order of assembly on accessories page in this manual.

Installing or removing abrasive disc (optional accessory)

NOTE:

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

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	1	1.	Lock nut
		2. Abrasive disc
	2	3.	Rubber pad
	3

010658

Mount the rubber pad onto the spindle. Fit the disc on the rubber pad 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 disc, follow the installation procedure in reverse.

OPERATION

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.

•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:

•Never switch on the tool when it is in contact with the workpiece, it may cause an injury to operator.

•Always wear safety goggles or a face shield during operation.

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

Grinding and sanding operation

A	B
	15°
010648

ALWAYS hold the tool firmly with one hand on rear handle 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 wire cup brush (optional accessory)

CAUTION:

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

•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. Wire cup brush
	1	2. Urethane
		washer
	2

010660

Unplug tool and place it upside down allowing easy access to spindle. Remove any accessories on spindle. Mount urethane washer then thread wire cup brush onto spindle and tighten with supplied wrench. When using brush, avoid applying too much pressure which causes over bending of wires, leading to premature breakage.

NOTE:

•When using wire cup brush, mount urethane washer to the spindle. It will make it easier to remove wire cup brush.

Operation with wire wheel brush (optional accessory)

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.

•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.

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•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. Wire wheel
1	brush

010659

Unplug tool and place it upside down allowing easy access to spindle. Remove any accessories on spindle. Thread wire wheel brush onto spindle and tighten with the wrenches.

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

MAINTENANCE

CAUTION:

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

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

	1	1. Exhaust vent
		2. Inhalation vent

2

010653

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.

Replacing carbon brushes

1. Commutator

22. Insulating tip

3. Carbon brush

1

3

001146

When the resin insulating tip inside the carbon brush is exposed to contact the commutator, it will automatically shut off the motor. When this occurs, both carbon brushes should be replaced. 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.

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.

	1.	Brush holder
		cap
	2.	Screwdriver
1	2
010649

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.

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.

•Your tool is supplied with a guard for use with a depressed center grinding wheel, multi-disc, flex wheel and wire wheel brush. 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.

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		1
2	2	8	2	12
3	3	9	11	13
4	6	10
5	7
	5
		GA7050/GA7050R/GA9050/GA9050R
1		Side grip
2		Wheel guard
3		Inner flange 89
4		Depressed center grinding wheel/Multi-disc
5		Lock nut 5/8-45
6		Plastic pad
7		Flex wheel
8		Rubber pad 170
9		Abrasive disc
10		Sanding lock nut 5/8-48
11		Wire wheel brush
12		Urethane washer 14
13		Wire cup brush
-		Lock nut wrench 28

Note

* In countries other than United States and Canada, Inner flange 45 can be also used.

011647

9

MAKITA LIMITED ONE YEAR WARRANTY

Warranty Policy

Every Makita tool is thoroughly inspected and tested before leaving the factory. It is warranted to be free of defects from workmanship and materials for the period of ONE YEAR from the date of original purchase. Should any trouble develop during this one year period, return the COMPLETE tool, freight prepaid, to one of Makita’s Factory or Authorized Service Centers. If inspection shows the trouble is caused by defective workmanship or material, Makita will repair (or at our option, replace) without charge.

This Warranty does not apply where:

repairs have been made or attempted by others:

repairs are required because of normal wear and tear:

the tool has been abused, misused or improperly maintained:

alterations have been made to the tool.

IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES FROM THE SALE OR USE OF THE PRODUCT. THIS DISCLAIMER APPLIES BOTH DURING AND AFTER THE TERM OF THIS WARRANTY.

MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLIED WARRANTIES OF "MERCHANTABILITY" AND "FITNESS FOR A SPECIFIC PURPOSE," AFTER THE ONE YEAR TERM OF THIS WARRANTY.

This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. Some states do not allow limitation on how long an implied warranty lasts, so the above limitation may not apply to you.

EN0006-1

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