Makita DGA517, Instruction Manual

Page: 17 / 184

17 ENGLISH
For 115 mm (4 - 1/2″) / 125 mm (5″)
model
► Fig.16: 1. Sanding lock nut 2. Abrasive disc
3. Rubber pad
1. Mount the rubber pad onto the spindle.
2. Fit the disc on the rubber pad and screw the sand-
ing lock nut onto the spindle.
3. Hold the spindle with the shaft lock, and securely
tighten the sanding lock nut clockwise with the lock nut
wrench.
To remove the disc, follow the installation procedure in
reverse.
Connecting a vacuum cleaner
Optional accessory
WARNING:
Never vacuum metal particles
created by grinding/cutting/sanding operation.
Metal particles created by such operation are so hot
that they ignite dust and the filter inside the vacuum
cleaner.
To avoid dusty environment caused by masonry cut -
ting, use a dust collecting wheel guard and a vacuum
cleaner.
Refer to the instruction manual attached to the dust
collecting wheel guard for assembling and using it.
► Fig.17: 1. Dust collecting wheel guard 2. Hose of
the vacuum cleaner
OPERATION
WARNING:
It should never be necessary to
force the tool.
The weight of the tool applies ade -
quate pressure. Forcing and excessive pressure
could cause dangerous wheel breakage.
WARNING:
ALWAYS replace wheel if tool is
dropped while grinding.
WARNING:
NEVER bang or hit grinding disc
or wheel onto work.
WARNING:
Avoid bouncing and snagging
the wheel, especially when working corners,
sharp edges etc. This can cause loss of control and
kickback.
WARNING:
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.
CAUTION:
Always wear safety goggles or a
face shield during operation.
CAUTION:
After operation, always switch off
the tool and wait until the wheel has come to a
complete stop before putting the tool down.
CAUTION:
ALWAYS hold the tool firmly with
one hand on housing and the other on the side
grip (handle).
Grinding and sanding operation
► Fig.18
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 forward direction or it may cut into
the workpiece. Once the edge of the wheel has been
rounded off by use, the wheel may be worked in both
forward and backward 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.
(In some European countries, when using a diamond
wheel, the ordinary guard can be used. Follow the
regulations in your country.)
WARNING:
NEVER use cut-off wheel for side
grinding.
WARNING:
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.
WARNING:
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.
WARNING:
During cutting operations, never
change the angle of the wheel. Placing side pres-
sure on the cut-off wheel (as in grinding) will cause
the wheel to crack and break, causing serious per-
sonal injury.
WARNING:
A diamond wheel shall be oper-
ated perpendicular to the material being cut.