5
ASSEMBLY
Installing side grip (auxiliary handle)
(Fig. 1)
CAUTION:
• Always be sure that the tool is switched off and
unplugged before installing or removing the side grip.
Always use the side grip to ensure operating safety. Install
the side grip so that the teeth on the grip fit in between the
protrusions on the tool barrel. Then tighten the grip by
turning clockwise at the desired position. It may be swung
360° so as to be secured at any position.
Installing or removing drill bit (Fig. 2)
CAUTION:
• Always be sure that the tool is switched off and
unplugged before installing or removing the bit.
To install the bit, place it in the chuck as far as it will go.
Tighten the chuck by hand. Place the chuck key in each of
the three holes and tighten clockwise. Be sure to tighten
all three chuck holes evenly. To remove the bit, turn the
chuck key counterclockwise in just one hole, then loosen
the chuck by hand.
After using the chuck key, be sure to return it to the
original position.
Depth gauge (optional accessory) (Fig. 3)
The depth gauge is convenient for drilling holes of uniform
depth. Loosen the side grip and insert the depth gauge
into the hole in the grip base. Adjust the depth gauge to
the desired depth and tighten the side grip.
NOTE:
• The depth gauge cannot be used at the position where
the depth gauge strikes against the gear housing.
FUNCTIONAL DESCRIPTION
Switch action (Fig. 4)
CAUTION:
• Before plugging in the tool, always check to see that
the switch trigger actuates properly and returns to the
"OFF" position when released.
To start the tool, simply pull the switch trigger. Tool speed
is increased by increasing pressure on the switch trigger.
Release the switch trigger to stop. For continuous
operation, pull the switch trigger and then push in the lock
button. To stop the tool from the locked position, pull the
switch trigger fully, then release it.
Reversing switch action (Fig. 5)
This tool has a reversing switch to change the direction of
rotation. Move the reversing switch lever to the
Õ
position
(A side) for clockwise rotation or to the
Ö
position (B side)
for counterclockwise rotation.
CAUTION:
• Always check the direction of rotation before operation.
• Use the reversing switch only after the tool comes to a
complete stop. Changing the direction of rotation
before the tool stops may damage the tool.
Selecting the action mode (Fig. 6)
This tool has an action mode change lever. For rotation
with hammering, slide the action mode change lever to
the right ( symbol). For rotation only, slide the action
mode change lever to the left ( symbol).
CAUTION:
• Always slide the action mode change lever all the way
to your desired mode position. If you operate the tool
with the lever positioned halfway between the mode
symbols, the tool may be damaged.
OPERATION
Hammer drilling operation
When drilling in concrete, granite, tile, etc., slide the action
mode change lever to the position of symbol to use
"rotation with hammering" action. Be sure to use a
tungsten-carbide tipped bit. Do not apply more pressure
when the hole becomes clogged with chips or particles.
Instead, run the tool at an idle, then remove the bit
partially from the hole. By repeating this several times, the
hole will be cleaned out.
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Drilling operation
When drilling in wood, metal or plastic materials, slide the
action mode change lever to the position of symbol to
use "rotation only" action.
Drilling in wood
When drilling in wood, the best results are obtained with
wood drills equipped with a guide screw. The guide screw
makes drilling easier by pulling the bit into the workplace.
Drilling in metal
To prevent the bit from slipping when starting a hole, make
an indentation with a center-punch and hammer at the
point to be drilled. Place the point of the bit in the
indentation and start drilling. Use a cutting lubricant when
drilling metals. The exceptions are iron and brass which
should be drilled dry.
CAUTION:
• Pressing excessively on the tool will not speed up the
drilling. In fact, this excessive pressure will only serve
to damage the tip of your bit, decrease the tool
performance and shorten the service life of the tool.
• There is a tremendous force exerted on the tool/bit at
the time of hole break through. Hold the tool firmly and
exert care when the bit begins to break through the
workplace.
• A stuck bit can be removed simply by setting the
reversing switch to reverse rotation in order to back
out. However, the tool may back out abruptly if you do
not hold it firmly.
• Always secure small workplaces in a vise or similar
hold-down device.
