Operation - Makita HR2300 Instruction Manual

Install the side grip so that the protrusions on the grip fit
in between the grooves 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
Coat the bit shank head beforehand with a small amount
of bit grease (about 0.5 – 1 g).
This chuck lubrication assures smooth action and longer
service life.
Installing or removing the bit
Clean the bit shank and apply bit grease before installing
the bit. (Fig. 5)
Insert the bit into the tool. Turn the bit and push it in until
it engages. (Fig. 6)
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. 7)
Depth gauge
The depth gauge is convenient for drilling holes of uni-
form depth. (Fig. 8)
Press the lock button on the grip base in the direction of
arrow shown in the figure and with the lock button being
pressed insert the depth gauge into the hex. hole in the
grip base. (Fig. 9)
At this time, the depth gauge needs to be inserted so that
its toothed side is directed to the toothed side of hex hole
marking on the grip base as shown in Fig. 10.
Adjust the depth gauge to the desired depth by moving it
back and forth while pressing the lock button. After the
adjustment, release the lock button to lock the depth
gauge. (Fig. 11)
NOTE:
• Inserting the depth gauge with its toothed side not
directed to the toothed side of hex hole marking on the
grip base as shown in the figure does not allow the
depth gauge to be locked.
Dust cup (Fig. 12)
Use the dust cup to prevent dust from falling over the tool
and on yourself when performing overhead drilling
operations. Attach the dust cup to the bit as shown in
Fig. 12. The size of bits which the dust cup can be
attached to is as follows.
Dust cup 5
Dust cup 9
006406
There is another type of dust cup (accessory) which
helps you prevent dust from falling over the tool and on
yourself when performing overhead drilling operations.
Installing or removing the dust cup
Before installing the dust cup, remove the bit from the
tool if installed on the tool. Install the dust cup (acces-
sory) on the tool so that the
aligned with the grooves in the tool. (Fig. 13)
To remove the dust cup, pull the chuck cover in the direc-
tion as shown in Fig. 14 and with the chuck cover pulled
take the bit out of the tool.
And then grab the attachment at the foot of dust cup and
take it out. (Fig. 15)
Bit diameter
6 mm – 14.5 mm
12 mm – 16 mm
symbol on the dust cup is
NOTE:
• When installing or removing the dust cup, the cap may
come off the dust cup. At that time, proceed as follows.
Remove the bellows from the attachment and fit the
cap from the side shown in the figure with its carved
side facing upward so that the groove in the cap fits in
the inside periphery of the attachment. Finally, mount
the bellows that has been removed. (Fig. 16, 17 & 18)
NOTE:
• If you connect a vacuum cleaner to your hammer,
cleaner operations can be performed. Dust cap needs
to be removed from the dust cup before the connection.
(Fig. 19)

OPERATION

Always use the side grip (auxiliary handle) and firmly
hold the tool by both side grip and switch handle during
operations.
Hammer drilling operation (Fig. 20)
Set the action mode changing knob to the
Position the bit at the desired location for the hole, then
pull the switch trigger. Do not force the tool. Light pres-
sure gives best results. Keep the tool in position and pre-
vent 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 bit partially from the hole. By
repeating this several times, the hole will be cleaned out
and normal drilling may be resumed.
CAUTION:
• There is 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 operat-
ing 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. 21)
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Drilling in wood or metal
Use the optional drill chuck assembly. When installing it,
refer to "Installing or removing the bit" described on the
previous page. (Fig. 22)
Diamond core drilling
When performing diamond core drilling operations,
always set the change lever to the
"rotation only" action.
CAUTION:
• If performing diamond core drilling operations using
"rotation with hammering" action, the diamond core bit
may be damaged.
symbol.
position to use
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