Manual Makita DGA455 (page 11 of 104) (English, German, Dutch, Danish, French, Italian, Portuguese, Turkish, Spanish)

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For tool with locking screw type wheel guard (Fig. 9)

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 to such an angle that it can

protect the operator according to work. Be sure to tighten

the screw securely.

To remove wheel guard, follow the installation procedure

in reverse.

Installing or removing depressed center

wheel or flap disc (optional accessory)

WARNING:

• When using a depressed center wheel or flap disc, the

wheel guard must be fitted on the tool so that the

closed side of the guard always points toward the

operator.

• Only actuate the shaft lock when the spindle is not

moving.

Mount the inner flange onto the spindle.

Make sure to fit the dented part of the inner flange onto

the straight part at the bottom of the spindle.

Fit the wheel/disc on the inner flange and screw the lock

nut onto the spindle. (Fig. 10)

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. (Fig. 11)

To remove the wheel, follow the installation procedure in

reverse.

Installing or removing Ezynut (optional

accessory)

CAUTION:

• Do not use Ezynut with Super Flange or angle grinder

with “F” on the end of the model No. Those flanges are

so thick that the entire thread cannot be retained by the

spindle.

Mount inner flange, abrasive wheel and Ezynut onto the

spindle so that Makita Logo on Ezynut faces outside.

(Fig. 12)

Press shaft lock firmly and tighten Ezynut by turning the

abrasive wheel clockwise as far as it turns.

Turn the outside ring of Ezynut counterclockwise to

loosen. (Fig. 13)

NOTE:

• Ezynut can be loosened by hand as long as the arrow

points the notch. Otherwise a lock nut wrench is

required to loosen it. Insert one pin of the wrench into a

hole and turn Ezynut counterclockwise. (Fig. 14 & 15)

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. (Fig. 16)

Follow instructions for depressed center grinding wheel/

flap 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) (Fig. 17)

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.

NOTE:

• Use sander accessories specified in this manual.

These must be purchased separately.

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. 18)

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 abrasive cut-off/diamond

wheel (optional accessory) (Fig. 19)

Remove the battery cartridge from the tool and place it

upside down allowing easy access to spindle. Mount the

inner flange and abrasive cut-off/diamond wheel onto the

spindle. Tighten the lock nut securely with supplied

wrench. The direction for mounting the lock nut and the

inner flange varies by wheel thickness.

Refer to the table below. (Fig. 20)

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Makita DGA455 Manual

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