HIKOKI PDA-125M 취급 지침 매뉴얼 - 페이지 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.