Operation; Optional Accessory - Makita GA4540R Instruction Manual

Models with the letter F are standard-equipped with Super
flange. Only 1/3 of efforts needed to undo lock nut,
compared with conventional type.
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. 10)
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. 11)
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. 12 & 13)
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.
Follow instructions for depressed center wheel but also
use plastic pad over wheel. See order of assembly on
accessories page in this manual. (Fig. 14)
Installing or removing abrasive disc

(optional accessory)

NOTE:
• Use sander accessories specified in this manual.
These must be purchased separately.
Mount the rubber pad onto the spindle. Fit the disc on the
rubber pad and screw the sanding lock nut onto the
spindle. To tighten the sanding lock nut, press the shaft
lock firmly so that the spindle cannot revolve, then use the
lock nut wrench and securely tighten clockwise. (Fig. 15)
To remove the disc, follow the installation procedure in
reverse.
Installing or removing dust cover
attachment (optional accessory)
WARNING:
• Always be sure that the tool is switched off and
unplugged before installing or removing the dust
cover attachment. Failure to do so causes damage to
the tool or a personal injury.
There are four pieces of dust cover attachment and each
is used in one of different positions.
Set the dust cover attachment so that the marking (A, B, C
or D) places as shown. Snap its pins in the vents.
(Fig. 16)
Dust cover attachment can be removed by hand.
NOTE:
• Clean out the dust cover attachment when it is clogged
with dust or foreign matters. Continuing operation with
a clogged dust cover attachment will damage the tool.

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
saw blades. 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.
• Always hold the tool firmly with one hand on housing
and the other on the side handle.
Grinding and sanding operation (Fig. 17)
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° 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)
WARNING:
• When using an abrasive cut-off/diamond wheel, be
sure to use only the special wheel guard designed for
use with cut-off wheels. (In some European countries,
when using a diamond wheel, the ordinary guard can
be used. Follow the regulations in your country.)
• NEVER use cut-off wheel for side grinding.
• 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.
• 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.
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