User Manual

11
CAUTION:
• There is a tremendous and sudden twisting force
exerted on the tool/bit at the time of hole
break-through, when the hole becomes clogged
with chips and particles, or when striking reinforcing
rods embedded in the concrete. Always use the
side grip (auxiliary handle) and firmly hold the tool
by both side grip and switch handle during
operations. Failure to do so may result in the loss of
control of the tool and potentially severe injury.
NOTE:
Eccentricity in the bit rotation may occur while operating
the tool with no load. The tool automatically centers itself
during operation. This does not affect the drilling
precision.
Blow-out bulb (optional accessory)
Fig.29
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Chipping/Scaling/Demolition
For Models HR2310T, HR2610, HR2610T, HR2611F,
HR2611FT
Fig.30
Set the action mode changing knob to the
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
For Models HR2300, HR2600, HR2601, HR2610,
HR2611F
Fig.31
Use the optional drill chuck assembly. When installing it,
refer to "Installing or removing the bit" described on the
previous page.
For Models HR2310T, HR2610T, HR2611FT
Fig.32
Fig.33
Use the quick change drill chuck as standard equipment.
When installing it, refer to "changing the quick change
chuck for SDS-plus " described on the previous page.
Fig.34
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
to tighten the chuck. To remove the bit, hold the ring and
turn the sleeve counterclockwise.
Set the action mode changing knob to the
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
quick change drill chuck is installed on the tool. The
quick change drill chuck 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 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 similar
hold-down device.
Diamond core drilling
When performing diamond core drilling operations,
always set the change lever to the
position to use
"rotation only" action.
CAUTION:
• If performing diamond core drilling operations using
"rotation with hammering" action, the diamond core
bit may be damaged.
Operation when using the dust cup
(accessory)
Fig.35
Operate the tool with the dust cup against the ceiling
surface.
NOTE:
• The dust cup (accessory) is intended only for
drilling in the ceramic workpiece such as concrete
and mortar. Do not use the tool with the dust cup
when drilling in metal or similar. Using the dust cup
for drilling in the metal may damage the dust cup
due to the heat produced by small metal dust or
similar.
• Empty the dust cup before removing a drill bit.
• When using the dust cup, make sure that the dust
cap is mounted on it securely.