Operation - Makita GA5020 Instruction Manual

For tool with clamp lever type wheel guard
► Fig.10: 1. Bearing box 2. Wheel guard 3. Screw
4. Lever
► Fig.11: 1. Screw
Loosen the lever on the wheel guard after loosening
the screw. 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 screw to
adjust the tightening of the wheel guard band.
To remove wheel guard, follow the installation proce-
dure in reverse.
Installing or removing depressed
center grinding wheel/Multi-disc
(optional 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.
► Fig.12: 1. Lock nut 2. Depressed center grinding
wheel/Multi-disc 3. Inner flange
Mount the inner flange onto the spindle. Fit the wheel/disc
on the inner flange 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.
► Fig.13: 1. Lock nut wrench 2. Shaft lock
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.
► Fig.14: 1. Ezynut 2. Abrasive wheel 3. Inner flange
4. Spindle
Mount inner flange, abrasive wheel and Ezynut onto the
spindle so that Makita Logo on Ezynut faces outside.
► Fig.15: 1. Shaft lock
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.16: 1. Arrow 2. Notch
► Fig.17
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.

OPERATION

WARNING:
• It should never be necessary to force the tool.
The weight of the tool applies adequate pres-
sure. 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, espe-
cially 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:
• 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 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.
10 ENGLISH