Functional Description - Makita HR2445 Manual De Instrucciones

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 opera-
tion, pull the switch trigger and then push in the lock but-
ton. To stop the tool from the locked position, pull the
switch trigger fully, then release it.
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.
• When you operate the tool in counterclockwise rotation,
the switch trigger is pulled only halfway and the tool
runs at half speed. For counterclockwise rotation, you
cannot push in the lock button.
This tool has a reversing switch to change the direction of
rotation. Move the reversing switch lever to the
tion (A side) for clockwise rotation or to the
(B side) for counterclockwise rotation.
Selection action mode (Fig. 3)
For Model HR2445
This tool employs an action mode changing knob. Select
one of the two modes suitable for your work needs by
using this knob. For rotation only, turn the knob so that
the arrow on the knob points toward the
tool body. For rotation with hammering, turn the knob so
that the arrow on the knob points toward the
on the tool body.
CAUTION:
• Always set the knob fully to your desired mode symbol.
If you operate the tool with the knob positioned half-
way between the mode symbols, the tool may be dam-
aged.
For Model HR2455
CAUTION:
• Do not rotate the action mode changing knob when the
tool is running under load. The tool will be damaged.
• To avoid rapid wear on the mode change mechanism,
be sure that the action mode changing knob is always
positively located in one of the three action mode posi-
tions.
6
Rotation with hammering (Fig. 4)
For drilling in concrete, masonry, etc., depress the lock
button and rotate the action mode changing knob to the
H symbol. Use a tungsten-carbide tipped bit.
Hammering only (Fig. 5)
For chipping, scaling or demolition operations, depress
the lock button and rotate the action mode changing
knob to the g symbol. Use a bull point, cold chisel, scal-
ing chisel, etc.
Rotation only (Fig. 6)
For drilling in wood, metal or plastic materials, depress
the lock button and rotate the action mode changing
knob to the m symbol. Use a twist drill bit or wood bit.
Torque limiter
The torque limiter will actuate when a certain torque level
is reached. The motor will disengage from the output
shaft. When this happens, the bit will stop turning.
CAUTION:
• As soon as the torque limiter actuates, switch off the
tool immediately. This will help prevent premature wear
of the tool.
• Hole saws cannot be used with this tool. They tend to
pinch or catch easily in the hole. This will cause the
torque limiter to actuate too frequently.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
D
unplugged before carrying out any work on the tool.
posi-
E
position
Side Grip (auxiliary handle) (Fig. 7)
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.
Bit grease (Fig. 8)
m
symbol on the
Coat the bit shank head beforehand with a small amount
of bit grease (about 0.5 – 1 g).
H
symbol
This chuck lubrication assures smooth action and longer
service life.
Installing or removing the bit
CAUTION:
Always be sure that the tool is switched off and
unplugged before installing or removing the bit.
Clean the bit shank and apply bit grease before installing
the bit. (Fig. 8)
Insert the bit into the tool. Turn the bit and push it in until
it engages. (Fig. 9)
After installing, always make sure that the bit is securely
held in place by trying to pull it out.
To remove the bit, pull the chuck cover down all the way
and pull the bit out. (Fig. 10)