Makita DHR280 Manuel D'instructions page 17

Installing or removing the dust
collection system
Optional accessory
To install the dust collection system, insert the tool into
the dust collection system all the way until it locks in
place with a little double click.
► Fig.23
To remove the dust collection system, pull the tool while
pressing the lock-off button.
► Fig.24: 1. Lock-off button
Dust cup
Optional accessory
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
the figure. The size of bits which the dust cup can be
attached to is as follows.
Model
Dust cup 5
Dust cup 9
► Fig.25: 1. Dust cup
Dust cup set
Optional accessory
Before installing the dust cup set, remove the bit from
the tool if installed.
Install the dust cup set on the tool so that the
bol on the dust cup is aligned with the groove in the tool.
► Fig.26: 1. symbol 2. Groove
NOTE: If you connect a vacuum cleaner to the dust
cup set, remove the dust cap before connecting it.
► Fig.27: 1. Dust cap
To remove the dust cup set, remove the bit while pulling
the chuck cover in the direction of the arrow.
► Fig.28: 1. Bit 2. Chuck cover
Hold the root of dust cup and pull it out.
► Fig.29
NOTE: If the cap comes off from the dust cup, attach
it with its printed side facing up so that groove on the
cap fits in the inside periphery of the attachment.
► Fig.30
Bit diameter
6 mm - 14.5 mm
12 mm - 16 mm
sym-
OPERATION
CAUTION:
Always use the side grip (auxiliary
handle) and firmly hold the tool by both side grip
and switch handle during operations.
CAUTION:
Always make sure that the work-
piece is secured before operation.
CAUTION:
Do not pull the tool out forcibly even
the bit gets stuck. Loss of control may cause injury.
CAUTION:
The dust collection system is intended
for drilling in concrete only. Do not use the dust collec-
tion system for drilling in metal or wood.
CAUTION:
When using the tool with the dust
collection system, be sure to attach the filter to the dust
collection system to prevent dust inhalation.
CAUTION:
Before using the dust collection
system, check that the filter is not damaged.
Failure to do so may cause dust inhalation.
CAUTION:
The dust collection system col-
lects the generated dust at a considerable rate,
but not all dust can be collected.
NOTICE:
Do not use the dust collection system
for core drilling or chiseling.
NOTICE:
Do not use the dust collection system for
drilling in wet concrete or use this system in wet envi-
ronment. Failure to do so may cause malfunction.
NOTE: If the battery cartridge is in low temperature, the
tool's capability may not be fully obtained. In this case,
warm up the battery cartridge by using the tool with no load
for a while to fully obtain the tool's capability.
► Fig.31
Hammer drilling operation
CAUTION:
There is tremendous and sudden twisting
force exerted on the tool/drill 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.
Set the action mode changing knob to the
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.
NOTE: Eccentricity in the drill bit rotation may occur
while operating the tool with no load. The tool auto-
matically centers itself during operation. This does not
affect the drilling precision.
17 ENGLISH
symbol.