Makita 8406c Instruction Manual page 8

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007617
Place the bit in the guide ring and turn the tool on.
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007620
After drilling a pilot groove, turn the tool off and then
remove the guide ring and adhesive sheet.
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007619
Place the bit into the pilot groove and turn the tool on.
Pivot the tool gently in the hole to be drilled while tilting it
at an angle of 2° - 3°. Gradually decrease the angle of tilt
as the hole becomes deeper. Immediately before hole
breakthrough, the tool should be held straight in relation
to the hole. After completing the hole, turn the tool off.
Wait until the bit has come to a complete stop before
withdrawing the tool.
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007616
CAUTION:
Make sure that water is running constantly from the
•
hole during operation. If the water flow becomes
inadequate, withdraw the tool slightly and press it
1. Adhesive sheet
2. Guide ring
1. Guide ring
2. Diamond core
bit
1. Pilot groove
1. Diamond core
bit
2. Pilot groove
8
again. Water should run freely. But if the problem
persists, unplug the tool and replenish the bit with
water immediately.
When resuming operation, do not turn the tool on
•
until the bit end reaches the deepest portion of the
hole.
Remove core material from the bit through the front
opening.
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007621
CAUTION:
When removing the core material from the bit, do
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not gouge it out or hit the bit with a screwdriver, etc.
If you have difficulty removing the core material through
the front opening, use the hex wrench to loosen the
screws and remove the holder. Then remove the sponge
and core material through the rear opening.
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007623
To install the holder, align the marking on the holder with
that on the bit and tighten the screws securely with the
hex wrench.
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007622
CAUTION:
Be careful not to damage the diamond core bit or
•
the O ring on the holder.
2. Drilling with dry type of diamond core bit
First, unplug the tool. Assemble the bit shank, core bit
and center bit. Install the bit assembly in the drill chuck.
1. Core material
2. Diamond core
bit
2
1. Holder
2
2. Screw
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3. Hex wrench
4. Core material
5. Sponge
5
1. Holder
2. Marking
3. Diamond core
bit
3