Makita GA9050R Instruction Manual page 11

Grinding and sanding operation
A
B
15°
010648
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.
Operation with wire cup brush (optional
accessory)
CAUTION:
Check operation of brush by running tool with no load,
•
insuring that no one is in front of or in line with brush.
Do not use brush that is damaged, or which is out of
•
balance. Use of damaged brush could increase potential
for injury from contact with broken brush wires.
1
010862
Unplug tool and place it upside down allowing easy access to
spindle. Remove any accessories on spindle. Mount wire cup
brush onto spindle and tighten with supplied wrench. When
using brush, avoid applying too much pressure which causes
over bending of wires, leading to premature breakage.
Operation with wire wheel brush
(optional accessory)
CAUTION:
Check operation of wire wheel brush by running
•
tool with no load, insuring that no one is in front of
or in line with the wire wheel brush.
Do not use wire wheel brush that is damaged, or which is
•
out of balance. Use of damaged wire wheel brush could
increase potential for injury from contact with broken wires.
1. Wire cup brush
11
ALWAYS use guard with wire wheel brushes,
•
assuring diameter of wheel fits inside guard.
Wheel can shatter during use and guard helps to
reduce chances of personal injury.
1
010659
Unplug tool and place it upside down allowing easy
access to spindle. Remove any accessories on spindle.
Thread wire wheel brush onto spindle and tighten with
the wrenches.
When using wire wheel brush, avoid applying too much
pressure which causes over bending of wires, leading to
premature breakage.
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 European
countries, when using a diamond wheel, the
ordinary guard can be used.)
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.
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.
A diamond wheel shall be operated perpendicular
•
to the material being cut.
Mount the inner flange onto the spindle. Fit the
wheel/disc on the inner flange and screw the lock nut
onto the spindle.
1. Wire wheel
brush