Makita GA5020 Instruction Manual page 11

NEVER bang or hit grinding disc or wheel onto
•
work.
Avoid bouncing
•
especially 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.
115 mm (4-1/2") / 125 mm (5") / 150 mm (6")
Abrasive cut-off wheel
Thickness: Less than
4 mm (5/32")
22.23 mm (7/8")
1. Lock nut
011184
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.
and snagging the
Thickness: 4 mm (5/32")
or more
1
2
22.23 mm (7/8")
3
2. Abrasive cut-off wheel
Grinding and sanding operation
Fig.18
wheel,
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 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.
Thickness: Less than
4 mm (5/32")
22.23 mm (7/8")
3. Inner flange
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.
11
Diamond wheel
Thickness: 4 mm (5/32")
or more
1
4
22.23 mm (7/8")
3
4. Diamond wheel