Makita HR3851 Instruction Manual page 6

Chipping/Scaling/Demolition
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.
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.
1
Rest the core bit on the concrete and turn the tool on.
Once the core bit has cut a shallow groove into the con-
crete, remove the center bit. Then resume drilling.
To remove the core bit, follow the procedures 1 or 2.
003205
symbol.
003209
1. Core bit
1
2. Adapter
2
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1. Center bit
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1. Rotate the change lever to the
rest the core bit on the concrete and turn the tool
on. The core bit will come loose from the hammer-
ing action.
2. Hold the adapter with the wrench, insert the rod
(optional accessory) into the hole in the core bit and
tap with a hammer to unscrew.
1
When not 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.
Rotate the change lever to the
bit on the concrete and turn the tool on. Once the core bit
has cut a shallow groove into the concrete, rotate the
change lever to the
6
position. Then
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1. Rod
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1. Core bit
1
2. Adapter
2
position. Rest the core
position and resume drilling.
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