Makita GA4540R Manuel D'instruction page 9

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 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
A
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.
• 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 work-
piece. Let the wheel reach full speed and care-
fully 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.
• 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 per-
sonal injury.
• A diamond wheel shall be operated perpendicu-
lar to the material being cut.
1
2
3
► 1. Lock nut 2. Abrasive cut-off wheel/diamond wheel
3. Inner flange 4. Wheel guard for abrasive cut-off
wheel/diamond wheel
As for the installation, follow the instructions for
depressed center wheel.
The direction for mounting the lock nut and the inner
flange varies by wheel thickness.
Refer to the table below.
9 ENGLISH
4