GA9050KX - Grinders MAKITA - Free user manual and instructions

USER MANUAL GA9050KX MAKITA

GA7020/GA7020F
GA7020S/GA7020SF
GA9020/GA9020F
GA9020S/GA9020SF

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Explanation of general view

1. Shaft lock

2. Lock nut

3. Inhalation vent

4. Switch trigger

5. Depressed center wheel

6. Commutator

7. Lock lever

8. Super flange

9. Insulating tip

10. Wheel guard

11. Inner flange

12. Carbon brush

13. Screw

14. Lock nut wrench

15. Brush holder cap

16. Bearing box

17. Exhaust vent

18. Screwdriver

SPECIFICATIONS

Model	GA7020/GA7020F/GA7020S/ GA7020SF	GA9020/GA9020F/GA9020S/ GA9020SF
Depressed center wheel diameter	180 mm	230 mm
Spindle thread	M14	M14
No load speed (min-1)	8,500	6,600
Overall length	473 mm	473 mm
Net weight	4.7 kg	4.7 kg
Rated voltage	回/II

• Due to our continuing program of research and development, the specifications herein are subject to change without notice.
  Note: Specifications may differ from country to country.

Symbols

END202-2

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

Read instruction manual.

DOUBLE INSULATION

Wear safety glasses.

Intended use

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

Power supply

The tool should be connected only to a power supply of the same voltage as indicated on the nameplate, and can only be operated on single-phase AC supply. They are double-insulated in accordance with European Standard and can, therefore, also be used from sockets without earth wire.

For public low-voltage distribution systems of between 220 V and 250 V.

Switching operations of electric apparatus cause voltage fluctuations. The operation of this device under unfavorable mains conditions can have adverse effects to the operation of other equipment. With a mains impedance equal or less than 0.27 Ohms it can be presumed that there will be no negative effects. The mains socket used for this device must be protected with a fuse or protective circuit breaker having slow tripping characteristics.

ADDITIONAL SAFETY RULES

ENB031-6

1. Always use eye and ear protection. Other personal protective equipment such as dust mask, gloves, helmet and apron should be worn.
2. Always be sure that the tool is switched off and unplugged before carrying out any work on the tool.
3. Keep guards in place.
4. 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 fiberglass reinforced wheels.
5. Check the wheel carefully for cracks or damage before operation. Replace cracked or damaged wheel immediately.
6. Observe the instructions of the manufacturer for correct mounting and use of wheels. Handle and store wheels with care.
7. Do not use separate reducing bushings or adaptors to adapt large hole abrasive wheels.
8. Use only flanges specified for this tool.
9. Do not damage the spindle, the flange (especially the installing surface) or the lock nut. Damage to these parts could result in wheel breakage.
10. 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.
11. 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 bal

anced wheel. Check the tool to determine the cause.

1. Check that the workpiece is properly supported.
2. Hold the tool firmly.
3. Keep hands away from rotating parts.
4. Make sure the wheel is not contacting the workpiece before the switch is turned on.
5. Use the specified surface of the wheel to perform the grinding.
6. Do not use cutting off wheel for side grinding.
7. Watch out for flying sparks. Hold the tool so that sparks fly away from you and other persons or flammable materials.
8. Pay attention that the wheel continues to rotate after the tool is switched off.
9. Do not touch the workpiece immediately after operation; it may be extremely hot and could burn your skin.
10. Position the tool so that the power cord always stays behind the machine during operation.
11. If working place is extremely hot and humid, or badly polluted by conductive dust, use a short-circuit breaker (30 mA) to assure operator safety.
12. Do not use the tool on any materials containing asbestos.
13. Do not use water or grinding lubricant.
14. Ensure that ventilation openings are kept clear when working in dusty conditions. If it should become necessary to clear dust, first disconnect the tool from the mains supply (use non metallic objects) and avoid damaging internal parts.
15. When use cut-off wheel, always work with the dust collecting wheel guard required by domestic regulation.
16. Cutting discs must not be subjected to any lateral pressure

SAVE THESE INSTRUCTIONS

FUNCTIONAL DESCRIPTION

CAUTION:

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

Shaft lock (Fig. 1)

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 (Fig. 2)

CAUTION:

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

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 push the lock lever (in the A direction) further in.

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

NOTE:

Models GA7020S, GA9020S, GA7020SF and GA9020SF begin to run slowly when they are turned on. This soft start feature assures smoother operation and less operator fatigue.

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) (Fig. 3)

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 (Fig. 4)

CAUTION:

• 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 counterclockwise. Be sure to tighten the screw securely.

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

Installing or removing depressed center grinding wheel/Multi-disc (accessory) (Fig. 5)

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

Super flange (Fig. 6)

Models GA7020F,GA7020SF,GA9020F and 9020SF are standard-equipped with a super flange. Only 1/3 of efforts needed to undo lock nut, compared with conventional type.

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.

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 (Fig. 7)

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.

MAINTENANCE

CAUTION:

• Always be sure that the tool is switched off and unplugged 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. (Fig. 8)

Replacing carbon brushes

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. (Fig. 9)

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. (Fig. 10)

To maintain product SAFETY and RELIABILITY, repairs, any other maintenance 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
  Depressed center wheels
• Lock nut (For depressed center wheel)
  Rubber pad
• Abrasive discs
• Lock nut (For abrasive disc)
• Lock nut wrench
  Cut-off wheels
• Inner flange (For cut-off wheel)
• Outer flange (For cut-off wheel)
• Wire cup brush
  Side grip
• Dust collecting wheel guard

Descriptif

For European countries only Noise and Vibration

The typical A-weighted noise levels are

sound pressure level: 90 dB (A)

sound power level: 103 dB (A)

• Wear ear protection. -

The typical weighted root mean square acceleration value is not more than 2.5m / s^2

These values have been obtained according to EN50144.

FRANÇAIS

Michigan Drive, Tongwell, Milton Keynes,

Bucks MK15 8JD, ENGLAND

Responsible manufacturer:

Fabricant responsible :

Michigan Drive, Tongwell, Milton Keynes,

Bucks MK15 8JD, ENGLAND

Fabricante responsavel:

Ansvarlig fabrikant:

EC-DECLARATION OF CONFORMITY

We declare under our sole responsibility that this product is in compliance with the following standards of standardized documents, EN50144, EN55014, EN61000 in accordance with Council Directives, 89/336/EEC, 98/37/EC.

FRANÇAIS

Déclaration de CONFORMITE CE

Michigan Drive, Tongwell, Milton Keynes,

Bucks MK15 8JD, ENGLAND

Responsible manufacturer:

Fabricant responsible :

EU-DEKLARATION OM KONFORMITET

Michigan Drive, Tongwell, Milton Keynes,

Bucks MK15 8JD, ENGLAND

Fabricante responsavel:

Ansvarlig fabrikant: