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Makita GA4040C Manual

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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° 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 work-
piece. Once the edge of the wheel has been rounded off
by use, the wheel may be worked in both A and B direc-
tion.
Operation with abrasive cut-off / diamond wheel
(optional accessory) (Fig. 19)
The direction for mounting the lock nut and the inner
flange varies by wheel thickness.
Refer to the table below.
012746
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.
The wheel may bind, walk up or kickback if the power
tool is started in the workpiece.
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100 mm (4") model
115 mm (4-1/2") / 125 mm (5") / 150 mm (6") model
Abrasive cut-off wheel Diamond wheel
Abrasive cut-off wheel Diamond wheel
16 mm (5/8")
Thickness: 4 mm (5/32") or more Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more
Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more
16 mm (5/8")
20 mm (13/16") 20 mm (13/16")
1. Lock nut 2. Abrasive cut-off wheel 3. Inner flange 4. Diamond wheel
22.23 mm (7/8") 22.23 mm (7/8")
22.23 mm (7/8") 22.23 mm (7/8")
1. Lock nut 2. Abrasive cut-off wheel 3. Inner flange 4. Diamond wheel
Thickness: Less than 4 mm (5/32")
… 10 …


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