Functional Description - Maktec MT816 Betriebsanleitung

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Switch action (Fig. 1)
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, push in the lock button
and then release the switch trigger. To stop the tool from
the locked position, pull the switch trigger fully, then
release it.
CAUTION:
• Switch can be locked in "ON" position for ease of oper-
ator comfort during extended use. Apply caution when
locking tool in "ON" position and maintain firm grasp on
tool.
Reversing switch action (Fig. 2)
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.
This tool has a reversing switch to change the direction
of rotation. Move the reversing switch lever to the D
position (A side) for clockwise rotation or to the E
position (B side) for counterclockwise rotation.
Selecting the action mode (Fig. 3)
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.
This tool has an action mode change lever. For rotation
with hammering, slide the action mode change lever to
the right (g symbol). For rotation only, slide the action
mode change lever to the left (m symbol).
ASSEMBLY
Installing side grip (auxiliary handle) (Fig. 4)
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.
4
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Installing or removing drill bit
CAUTION:
• Always be sure that the tool is switched off and
unplugged before installing or removing the bit.
For Model MT816/MT817 (Fig. 5)
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.
For Model MT818 (Fig. 6)
Hold the ring and turn the sleeve counterclockwise to
open the chuck jaws. Place the bit in the chuck as far as
it will go. Hold the ring firmly and turn the sleeve
clockwise to tighten the chuck.
To remove the bit, hold the ring and turn the sleeve
counterclockwise.
Depth gauge (Optional accessory) (Fig. 7)
The depth gauge is convenient for drilling holes of
uniform depth. Install the depth gauge by the following
sequence.
1. Turn the side grip counterclockwise to loosen the
hex bolt fully and pull it out.
2. Insert the hex bolt into the side grip through the grip
base.
3. Slightly tighten the side grip.
4. Insert the depth gauge and adjust the depth of hole.
5. Turn the side grip clockwise so that the depth gauge
and the grip base are fixed on the tool completely.
NOTE:
• The depth gauge cannot be used at the position where
the depth gauge strikes against the tool body.
OPERATION (Fig. 8)
CAUTION:
• Always use the side grip (auxiliary handle) and firmly
hold the tool by both side grip and switch handle during
operations.
Hammer drilling operation
CAUTION:
• There is tremendous and sudden twisting force exerted
on the tool/bit at the time of hole break-through, when
the hole becomes clogged with chips and particles, or
when striking reinforcing rods embedded in the con-
crete. Always use the side grip (auxiliary handle) and
firmly hold the tool by both side grip and switch handle
during operations. Failure to do so may result in the
loss of control of the tool and potentially severe injury.
When drilling in concrete, granite, tile, etc., slide the
action mode change lever to the position of g 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.