Operation - Makita HR160D Instruction Manual

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, core bits, diamond core bits, etc. 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 the bat-
tery cartridge is removed before carrying out any work
on the tool.
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 (Fig. 5, 6, 7)
Clean the bit shank and apply bit grease before installing
the bit.
Insert the bit into the tool. Turn the bit and push it in until
it engages.
If the bit cannot be pushed in, remove the bit. Pull the
chuck cover down a couple of times. Then insert the bit
again. Turn the bit and push it in until it engages.
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.
Using cold chisel or bull point (Fig. 8)
When using optional cold chisel or bull point, proceed as
follows.
1. Unplug the tool.
2. Remove the side grip from the tool.
3. Set the action mode changing knob to "rotation with
hammering" symbol.
4. Install the chisel on the tool. Refer to "installing or
removing the bit".
5. Install the chisel adapter (optional accessory) on the
tool so that the chisel is inserted through the chisel
adapter.
6. Rotate the chisel so that the chisel faces toward the
direction suitable for your work. Then secure the
chisel and chisel adapter to the tool using the clamp
screw on the chisel adapter.
7. Set the action mode changing knob to "hammering
only". Now you can use the chisel.
8. To remove the chisel, follow the installation proce-
dures in reverse.
CAUTION:
• Always use "hammering only" action when the chisel
adapter is installed on the tool. If you use "rotation with
hammering" or "rotation only", a malfunction and dam-
age to the tool will result.
6
Depth gauge (Fig. 9)
The depth gauge is convenient for drilling holes of uni-
form depth. Insert the depth gauge into the hole in the
grip base. Adjust the depth gauge to the desired depth
and then tighten the clamp screw to secure the depth
gauge.
NOTE:
• The depth gauge cannot be used at the position where
the depth gauge strikes against the gear housing.
Dust cup (Fig. 10)
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. 10.
The size of bits which the dust cup can be attached to is
as follows.
Dust cup 5
Dust cup 9

OPERATION

Hammer drilling operation
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 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 embed-
ded 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.
Blow-out bulb (optional accessory) (Fig. 11)
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Drilling in wood or metal (Fig. 12)
Use the optional drill chuck assembly (consisting of drill
chuck and chuck adapter assembly). When installing it,
refer to "Installing or removing the bit".
Set the action mode changing knob to "rotation only". You
can drill up to 13 mm diameter in metal and up to 20 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.
Bit diameter
6 mm – 14.5 mm
12 mm – 16 mm