6
For HP2041 (Fig.3)
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
until the chuck is tightened with a little click. After the
click, always tighten the chuck additionally to prevent
accidental loosening during operation.
To remove the bit, hold the ring and turn the sleeve coun-
terclockwise.
Depth gauge (Fig.4)
The depth gauge is convenient for drilling holes of uni-
form depth. Loosen the side grip and insert the depth
gauge into the hole in the side grip. 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.
Switch action (Fig.5)
CAUTION:
Before plugging in the tool, always check to see that the
switch trigger actuates properly and returns to the “OFF”
position when released.
For HP2040 and HP2041
To start the tool, simply pull the trigger. Tool speed is
increased by increasing pressure on the trigger. Release
the trigger to stop. For continuous operation, pull the trig-
ger and then push in the lock button. To stop the tool from
the locked position, pull the trigger fully, then release it.
For HP2042
To start the tool, simply pull the trigger. Release the trig-
ger to stop. For continuous operation, pull the trigger and
then push in the lock button. To stop the tool from the
locked position, pull the trigger fully, then release it.
Reversing switch action (Fig. 6)
For HP2040 and HP2041
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
for clockwise rotation or the
e position for counterclock-
wise rotation.
Speed change (Fig.7)
Two rpm ranges can be preselected with the speed
change knob.
For low speed, turn the knob so that the pointer on the
knob points to the number 1 marked on the tool body.
(Fig.7-1)
For high speed, turn the knob so that the pointer points to
the number 2. (Fig. 7-2)
If the knob is not turned smoothly, turn the chuck slightly
in either direction and then turn the knob again.
Selecting action mode (Fig.8)
This tool has an action mode change button. For rotation
only, depress the button from the side with
f symbol.
For rotation with hammering, depress the button from the
side with
g symbol.
CAUTION:
Always depress the button all the way to your desired
mode position. If you operate the tool with the button
positioned half-way between the mode symbols, the tool
may be damaged.
Operation
1. Hammer drilling operation
When drilling in concrete, granite, tile, etc., depress
the action mode change button from the side with
g symbol to use “rotation with hammering” action.
Be sure to use a tungsten-cabide 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. (Fig.9)
2. Drillng operation
When drilling in wood, metal or plastic materials,
depress the action mode change button from the
side with
f symbol to use “rotation only” action.
• Drilling in wood
When drilling in wood, best results are obtained
with wood drills equipped with a guide screw. The
guide screw makes drilling easier by pulling the bit
into the workpiece.
• Drilling in metal
To prevent the bit from slipping when starting a
hole, make an indentation with a centerpunch 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 twisting force exerted on
the tool/bit at the time of hole breakthrough. Hold
the tool firmly and exert care when the bit begins
to break through the workpiece.
• 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 workpieces in a vise or simi-
lar hold-down device.
