Makita HR3851 Instruction Manual page 9

BlOw-oUt
bulb
Use the blow-out bulb to clean out the
hole.
Core bit (optional accessory)
[When using the center bit]
Screw the core bit on the adapter. Install
the adapter with the core bit in the tool in
the same manner as a drill bit.
Install the center bit.
Rest
the core bit
on
the concrete and turn
the tool on. Once the core bit has cut
a
shallow groove into the concrete, remove
the center bit. Then resume drilling.
9