Manual Hitachi SP 18 VA (page 8 of 56) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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4. Confirm the lock pin

Confirm that the lock pin is disengaged by pushing

the lock pin two or three times before switching

the power tool on. (See Fig. 3, 4)

5. Fixing the loop handle

Fix the loop handle with a bolt and a washer to

the gear cover.

PRACTICAL ELECTRONIC SANDER POLISHER

APPLICATIONS

Motor speed is increased by increasing pressure on

the trigger. Release the trigger to stop. For continuous

operation, pull the trigger and then push in the lock

button. To stop the motor from the locked position,

pull the trigger full, then release it.

Motor speed can be variable as desired by rotating the

dial; it is increased by turning the dial towards “6”,

decreased by turning it towards “1” (Fig. 1).

Select the motor speed appropriate for the work being

done. The following table gives the motor speeds

corresponding to each indication on the dial scale and

shows the types of work for which they are suitable.

Dial

R.P.M. Type of work

Indication

1 600

2 1100

For Polishing

3 1700

4 2300

5 2900

For Sanding

6 3400

CAUTION

The dial cannot be rotated further than the “6” or “1”

on the scale in their respective directions.

1. Sander operation

(1) This unit is designed to provide sufficient polishing

(sanding) power with the disc pressed lightly against

the sanding/polishing surface: it is equipped with

an electronic control circuit to ensure that the motor

will not slow down even when loaded. There is

therefore no need to press the sanding disc hard

against the surface; doing so can overload the motor,

subsequently causing the overload cut device to

step into operation by cutting the motor’s power

supply.

If this should happen, cut the power switch and turn

at the correct motor speed.

(2) Do not apply the entire disc surface to the surface

of the material. As shown in Fig. 2, the sander

should be held at an approximately 15° to 25° angle

in relation to the material surface so that the

peripheral portion of the sanding disc is offered to

the material surface.

(3) Precaution immediately after finishing an operation:

After turning the switch OFF, do not put the sander

down until the sanding disc has come to a complete

stop. This precaution will not only prevent a serious

accident, but will also reduce the amount of dust

and swarf sucked into the machine.

2. Polisher operation:

(1) Curved surfaces as well as flat surfaces can be

efficiently finished. Do not excessively push the

polisher against the surface of the material. The

weight of the polisher alone is sufficient for effective

polishing. Excessive pressure will result in a poor

finish and cause possible overload to the motor.

(2) Sanding disc, polishing compound or wax should

be selected in accordance with the material and the

desired surface finish. Maximum polishing effect

will be attained by following the following method:

⅜ Preliminary polishing with sander using a finegrain

sanding disc.

⅜ Polishing with wool bonnet using polishing

compound and/or wax. Apply a small quantity of

compound and/or wax on material surface and polish

with the wool bonnet.

CAUTION

⅜ Carefully guard against permitting the cabtyre cord

to touch the wool bonnet or sanding disc during

operation. If the cord touches, there is a danger that

it may become entangled.

⅜ Do not use the lock pin as a brake to stop the tool

as this may lead to damage of the gear or

detachment of the tool.

MOUNTING AND DISMOUNTING THE

SANDING DISC AND WOOL BONNET

1. For Sander operation (Fig. 3)

(1) After placing the sanding disc on the rubber pad,

thread the washer nut onto the spindle.

(2) Press the lock pin to secure the spindle and tighten

the washer nut with a wrench.

(3) To remove the sanding disc, follow the above

procedures in reverse.

2. For Polisher operation (Fig. 4)

(1) Insert the washer nut through the rubber pad and

thread it onto the spindle.

(2) Press the lock pin to secure the spindle and tighten

the washer nut with a wrench.

(3) As shown in Fig. 5, wrap the rubber pad with the

hood of the wool bonnet, and firmly secure it by

tightening and tying its draw string. Be sure the

excess string is firmly tucked inside the wool bonnet

to prevent it from flying out while polishing.

CAUTION

Improper fitting of the wool bonnet may cause

vibration.

(4) To remove the wool bonnet, follow the above

procedures in reverse.

CAUTION

⅜ Use a wrench to tighten the washer nut

sufficiently.

⅜ After releasing the lock pin, check to be sure

that it has returned to its normal position.

MAINTENANCE AND INSPECTION

1. Inspecting the mounting screws:

Regularly inspect all mounting screws and ensure

that they are properly tightened. Should any of the

screws be loose, retighten them immediately. Failure

to do so could result in serious hazard.

01Eng_SP18VA_WE 2/19/09, 19:427

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Hitachi SP 18 VA Manual

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