Norton Clipper CDR 252 Operating Instructions Manual page 18

VERS.2015.04.21
5.2.9 Pulling the core out of the bit

Unscrew the core bit from the motor axle.

Hold the bit vertically.

Beat lightly the tube of core bit with a wood hammer until the core goes out. Never beat
the core bit with violence against a wall or with tools like hammers or wrenches.
Otherwise, you may distort the tube, preventing the core from coming out of the core bit
and the re-use of the bit.

If the core is stuck into the bit, try to crush it with a chisel. Be careful not to damage the
core bit.
5.2.10 Pulling the core out of the hole (blind holes)

Using a wedge or a lever, snap the core.

To extract the core out of the hole use the special pliers or a wire loop, or make a little
hole into the top of the core and put into it an eyebolt to pull up and remove the core.
5.2.11 Drilling using an extension rod
To make hole deeper than the tool length:

Make the hole for the full depth of the bit.

Take the bit out of the hole and switch the motor off.

Take the core out of the hole without moving the machine.

Unscrew the core bit from the motor axle and put it into the hole.

Screw the extension rod between the core bit and the motor axle. For 1¼'' back fitting
end, insert a brass or bronze washer.
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CDR 252_MAN_EN