8
Grinding and sanding operation
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. (Fig. 10)
Operation with abrasive cut-off wheel
(optional accessory) (Fig. 11)
WARNING:
• When using an abrasive cut-off wheel, be sure to use
only the special wheel guard designed for use with cut-
off wheels.
• NEVER use cut-off wheel for side grinding.
During cutting operations, never change the angle of the
wheel. Placing side pressure on the cut-off wheel (as in
grinding) will cause the wheel to crack and break, causing
serious personal injury.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.
(Fig. 12)
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.
To maintain product SAFETY and RELIABILITY, repairs,
carbon brush inspection and replacement, 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
• Wire cup brush
• Wire bevel brush 85
• Side grip
• Diamond wheel
• Abtasive cut-off wheel
For Model GA4030
ENG101-1
For European countries only
Noise
The typical A-weighted noise level determined according
to EN60745-2-3:
Sound pressure level (L
pA
): 85 dB (A)
Uncertainty (K): 3 dB (A)
The noise level under working may exceed 85 dB (A).
Wear ear protection.
Vibration
ENG208-2
The vibration total value (tri-axial vector sum) determined
according to EN60745-2-3:
Work mode: surface grinding
Vibration emission (a
h,AG
): 7.0 m/s
2
Uncertainty (K): 1.5 m/s
2
Cutting-off or wire brushing may have different vibration
emission values.
For Model GA4530
ENG101-1
For European countries only
Noise
The typical A-weighted noise level determined according
to EN60745-2-3:
Sound pressure level (L
pA
): 85 dB (A)
Uncertainty (K): 3 dB (A)
The noise level under working may exceed 85 dB (A).
Wear ear protection.
Vibration
ENG208-2
The vibration total value (tri-axial vector sum) determined
according to EN60745-2-3:
Work mode: surface grinding
Vibration emission (a
h,AG
): 7.5 m/s
2
Uncertainty (K): 1.5 m/s
2
Cutting-off or wire brushing may have different vibration
emission values.
For Model GA5030
ENG101-1
For European countries only
Noise
The typical A-weighted noise level determined according
to EN60745-2-3:
Sound pressure level (L
pA
): 85 dB (A)
Uncertainty (K): 3 dB (A)
The noise level under working may exceed 85 dB (A).
Wear ear protection.
Vibration
ENG208-2
The vibration total value (tri-axial vector sum) determined
according to EN60745-2-3:
Work mode: surface grinding
Vibration emission (a
h,AG
): 8.5 m/s
2
Uncertainty (K): 1.5 m/s
2
Cutting-off or wire brushing may have different vibration
emission values.
