Maintenance - Makita HR2450 Betriebsanleitung

Dust cup (Fig. 15)
Use the dust cup to prevent dust from falling over the tool
and on yourself when performing overhead drilling opera-
tions. Attach the dust cup to the bit as shown in Fig. 15.
The size of bits which the dust cup can be attached to is
as follows.
Dust cup 5
Dust cup 9
Chipping/Scaling/Demolition (Fig. 16)
Set the action mode changing knob to the g symbol.
Hold the tool firmly with both hands. Turn the tool on and
apply slight pressure on the tool so that the tool will not
bounce around, uncontrolled. Pressing very hard on the
tool will not increase the efficiency.
Drilling in wood or metal (Fig. 17 & 18)
Use the optional drill chuck assembly. When installing it,
refer to "Installing or removing drill bit" described on the
previous page.
Set the action mode changing knob to the m symbol. You
can drill up to 13 mm diameter in metal and up to 32 mm
diameter in wood.
CAUTION:
• Never use "rotation with hammering" when the drill
chuck assembly is installed on the tool. The drill chuck
assembly may be damaged.
Also, the drill chuck will come off when reversing the
tool.
• 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 perfor-
mance 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 similar
hold-down device.
Diamond core drilling
When performing diamond core drilling operations,
always set the change lever to the
tion only" action.
CAUTION:
If performing diamond core drilling operations using
"rotation with hammering" action, the diamond core bit
may be damaged.
Bit diameter (mm)
6 – 14.5
12 – 16
m
position to use "rota-

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
To maintain product safety and reliability, repairs, mainte-
nance or adjustment should be carried out by a Makita
Authorized Service Center.
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