Operation - Makita HR3520B Instruction Manual

The side grip can also be installed in the position shown
in the figure. Remove the side grip from the grip base by
turning the side grip counterclockwise. Screw the side
grip on either side of the tool, whichever is convenient.
Installing or removing the bit
003152
Important:
Always be sure that the tool is switched off and
unplugged before installing or removing the bit.
Insert the bit into the tool holder as far as it will go. Pull
out and turn the tool retainer 180 degrees. Then release
it to secure the bit.
CAUTION:
Never use A-type shank bits. They can cause
•
damage to the tool.
37 27
19
19
A
003155
To remove the bit, follow the installation procedure in
reverse.

OPERATION

Hammer drilling operation
003202
Set the change lever to the
Position the 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
1. Tool holder
2. Tool retainer
1
2
180
38.5 37
16
B
symbol.
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 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 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.
Blow-out bulb (optional accessory)
002449
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Chipping/Scaling/Demolition
003208
Set the change lever to the
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.
6
1. Blow-out bulb
1
symbol.