Makita HP331D Manual De Instrucciones página 9

either side and then secure it with a screw. To remove,
loosen the screw and then take it out.
Installing driver bit holder
Optional accessory
[Fig.11: 1. Driver bit holder 2. Driver bit]
Fit the driver bit holder into the protrusion at the tool foot
on either right or left side and secure it with a screw.
When not using the driver bit, keep it in the driver bit
holders. Driver bits 45 mm-long can be kept there.
OPERATION
CAUTION:
Always insert the battery cartridge
all the way until it locks in place. If you can see
the red part on the upper side of the button, it is not
locked completely. Insert it fully until the red part can-
not be seen. If not, it may accidentally fall out of the
tool, causing injury to you or someone around you.
CAUTION:
When the speed comes down
extremely, reduce the load or stop the tool to
avoid the tool damage.
Hold the tool firmly with one hand on the grip and the
other hand on the bottom of the battery cartridge to
control the twisting action.
[Fig.12]
Screwdriving operation
CAUTION:
Adjust the adjusting ring to the
proper torque level for your work.
CAUTION:
Make sure that the driver bit is
inserted straight in the screw head, or the screw
and/or driver bit may be damaged.
First, turn the action mode changing ring so that the
arrow on the tool body points to the
Place the point of the driver bit in the screw head and
apply pressure to the tool. Start the tool slowly and then
increase the speed gradually. Release the switch trigger
as soon as the clutch cuts in.
NOTE: When driving wood screw, pre-drill a pilot hole
2/3 the diameter of the screw. It makes driving easier
and prevents splitting of the workpiece.
Hammer drilling operation
CAUTION:
There is a tremendous and sud-
den twisting force exerted on the tool/drill bit
at the time of hole breakthrough, when the hole
becomes clogged with chips and particles, or
when striking reinforcing rods embedded in the
concrete.
First, turn the action mode changing ring so that the
arrow on the tool body points to the marking. The
adjusting ring can be aligned in any torque levels for
this operation.
Be sure to use a tungsten-carbide tipped drill bit.
Position the drill bit at the desired location for the hole,
then pull the switch trigger. Do not force the tool. Light
pressure gives best results. Keep the tool in position
and prevent it from slipping away from the hole.
Do not apply more pressure when the hole becomes
clogged with chips or particles. Instead, run the tool at
an idle, then remove the drill bit partially from the hole.
By repeating this several times, the hole will be cleaned
out and normal drilling may be resumed.
Blow-out bulb
Optional accessory
[Fig.13: 1. Blow-out bulb]
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Drilling operation
First, turn the adjusting ring so that the pointer points to
the
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 drill bit into
the workpiece.
Drilling in metal
To prevent the drill 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
drill bit in the indentation and start drilling.
Use a cutting lubricant when drilling metals. The excep-
tions are iron and brass which should be drilled dry.
will not speed up the drilling. In fact, this excessive
pressure will only serve to damage the tip of your drill
bit, decrease the tool performance and shorten the
service life of the tool.
marking.
when the drill bit begins to break through the
workpiece. There is a tremendous force exerted on
the tool/drill bit at the time of hole break through.
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.
a vise or similar hold-down device.
until the battery cartridge has discharged, allow
the tool to rest for 15 minutes before proceeding
with a fresh battery.
Using the tool as a hand screwdriver
[Fig.14]
Switch off the tool.
Move the reversing switch lever to the neutral position.
Turn the action mode changing ring so that the arrow
points to the
Turn the tool.
marking. Then proceed as follows.
CAUTION:
Pressing excessively on the tool
CAUTION:
Hold the tool firmly and exert care
CAUTION:
A stuck drill bit can be removed
CAUTION:
Always secure small workpieces in
CAUTION:
If the tool is operated continuously
marking.
ENGLISH 9