Drilling Operation; Using Holster; Maintenance - Makita HP331D Instruction Manual

Hammer drilling operation
CAUTION:
There is a tremendous and sudden
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
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 arrow points to
the marking. Then proceed as follows.
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.
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 drill bit, decrease
the tool performance and shorten the service life of the tool.
CAUTION:
Hold the tool firmly and exert care
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.
CAUTION:
A stuck drill 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.
CAUTION:
Always secure workpieces in a
vise or similar hold-down device.
CAUTION:
If the tool is operated continuously until
the battery cartridge has discharged, allow the tool to rest
for 15 minutes before proceeding with a fresh battery.
marking. The adjusting
10 ENGLISH
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 marking.
Turn the tool.
NOTE: This use is convenient for checking the
screwdriving.
NOTE: Do not use the tool for work requiring exces-
sive force, such as tightening bolt or removing rusted
screws.

Using holster

Optional accessory
CAUTION:
When using the holster, remove a
driver bit/drill bit from the tool.
CAUTION:
Turn off the tool and wait until it
comes to a complete stop before placing it in the
holster.
Be sure to close the holster securely with the
holster button so that it holds the tool firmly.
1.
Thread a waist belt or similar through holster
holder.
► Fig.15: 1. Holster holder 2. Waist belt
2. Put the tool in the holster and lock it with the hol-
ster button.
► Fig.16
► Fig.17
You can keep two driver bits at the front of the holster.

MAINTENANCE

CAUTION:
Always be sure that the tool is
switched off and the battery cartridge is removed
before attempting to perform inspection or
maintenance.
NOTICE:
Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
To maintain product SAFETY and RELIABILITY,
repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.