HIKOKI PDA-125M Manual de Instruções de Manuseamento - Página 7
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7. Confi rming and mounting the depressed center
wheel.
Thoroughly check that a specifi ed depressed center
wheel is free of cracks and splits is mounted.
Confi rm that the depressed center wheel is mounted
under the specifi ed condition and is fi rmly clamped.
For details, refer to the item "Assembling and
Disassembling the depressed center wheel".
8. Fixing the side handle.
Screw the side handle into the gear cover. (As shown in
Fig. 1)
9. Apply a trial run
To start grinding work without checking for possible
cracks and splits in the depressed center wheel is very
dangerous. Prior to start of grinding, direct the grinder
in a direction where no one is present, and apply a trial
run without fail to confi rm that the grinder displays no
abnormalities.
Duration of the trial run is as follows:
When depressed center wheels is replaced
............................................... 3 minutes or more
When starting daily work ................1 minute or more
PRACTICAL GRINDER APPLICATIONS
1. Since grinding by utilizing only the grinder's own weight
is feasible, the grinder should never be pressed forcibly
against the plane to be ground Hold the grinder lightly so
that it only slightly contacts the plane to be ground.
Heavy pressure will reduce the revolving speed and
such deteriorate the fi nished surface, and phenomena as
overload will lead to burning out of the motor.
2. Do not utilize the grinder entire surface when grinding.
Use only its peripheral surface by tilting the wheel at an
angle of 15-30°, as shown in Fig. 2.
3. When a grinder equipped with a new depressed center
wheel is pushed forward (direction A), the wheel edge
may occasionally cut into the material to be ground.
Always pull it backward (direction B) in this instance.
However, once the depressed center wheel angle has
been adequately abraded, both forward and backward
operations are permissible.
4. The provided depressed center wheel (resinoid wheel) is
rated as Class A grain and #36 grain size.
Accordingly, its range of applications cover a wide
variety, proving to be most suitable for heavy grinding
of general steel materials. Since the wheel grain size
is rather coarse, creating a fi ne-surfaced fi nish is very
diffi cult.
In this instance, hold the grinder lightly as through trying
to lift it, and apply grinding slowly at a constant low
speed. Whereby a fi ne fi nish similar to that accomplished
with a fi ne-grain depressed center wheel is obtainable.
5. Switching on the grinder
The switch can be turned ON by turning its lever ON side,
or turn OFF by turning its lever to the OFF side.
6. Precaution after use
Do not lay the grinder down immediately after use in a
place where there are many shavings and much dirt and
dust until it has completely stopped revolving.
CAUTION
○ Shock to the main body can be the cause of cracks or
splits in the depressed center wheel. Be especially careful
to avoid sudden shocks when using the equipment.
If the main unit is accidentally bumped or dropped, make
a careful check for cracks or splits on the depressed
center wheel before further use.
○ Do not press the push button when the equipment is
turning. Also, do not turn on the switch when the push
button is pressed down.
ASSEMBLING AND DISASSEMBLING
THE DEPRESSED CENTER WHEEL (Fig. 3)
CAUTION
Be sure to switch power OFF and disconnect the
attachment plug from the power receptacle to avoid
serious trouble.
(1) Turn the equipment upsidedown so that the spindle will
be facing up.
(2) Mount the wheel washer onto the spindle.
(3) Mount the protuberance of the depressed center wheel
onto the wheel washer.
(4) Mount the convex side of the wheel nut onto the
depressed center wheel, and screw the wheel nut onto
the spindle.
(5) As shown in Fig. 3 push in the push button to prevent
rotation of the spindle. Then, secure the depressed
center wheel by tightening the wheel nut with the wrench.
CAUTION: Confi rm that the depressed center wheel is
mounted fi rmly.
Confi rm that the push button is disengaged by
pushing push button two or three times before
switching the power tool on.
○ Disassembling of the depressed center wheel is the
reverse of assembling.
HOW TO INSTALL THE OPTIONAL ACCESSORIES
CAUTION
○ Be sure to switch power OFF and disconnect the plug
from the power receptacle to avoid serious trouble. When
utilizing the optional accessories, keep the wheel guard
attached and wear protective glasses.
○ Do not use the optional accessories which exceed
the designated external diameter designated in the
paragraph.
1. Mounting the 125 mm Sanding Disc. (Fig. 4)
NOTE
Do not use the wheel washer and wheel nut of the
depressed center wheel.
(1) Mount the rubber pad and sanding disc onto the spindle.
(2) Screw from the washer nut onto the spindle.
(3) As shown in Fig. 4, push in the push button to prevent
rotation of the spindle. Then, secure the sanding disc by
tightening the wheel nut with the wrench.
2. Mounting the Diamond Wheel (Fig. 5)
CAUTION
When utilizing the diamond wheel, pay particular
attention to the following points.
(1) Utilize the correct size diamond wheel (external dia.
125 mm, internal dia. 22.2 mm)
(2) Do not apply cooling water or grinding fl uid while utilizing
the diamond wheel.
(3) Hold the tool fi rmly to control the tendency of the tool to
be repelled by the material during cutting operation.
(4) Ensure that the cutting depth is kept within 2-5 mm to
prevent over-heating damage to the motor. Use with
moderate cutting speed, and do not apply excessive
pressure on the workpiece.
NOTE
Mounting of the diamond wheel on the spindle is
illustrated in Fig. 5. Note that the wheel washer is
reversed from ordinary usage with depressed center
wheel.
(1) Mount the wheel washer and diamond wheel onto the
spindle.
(2) Mount the concave side of the wheel nut onto the
diamond wheel, and screw the wheel nut onto the
spindle.
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