VERS.2015.05.19 Kit CDR 163 + CDM 203_MAN_EN
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You are going through the steel rods for reinforced concrete. Follow these instructions:
If possible, select a lower gear. Remember that you must firstly take the core bit out of the hole
and switch the motor off in order to change from gear.
Reduce the thrust on the core bit.
Once you have finished cutting the rods, you can reselect the initial gear and drilling speed.
5.2.6 Mechanical clutch
The motor is equipped with a mechanical clutch. It protects against mechanical overload of the
motor. However, the motor might be damaged if it works longer than two seconds. Therefore reduce
the drilling force and switch the motor off.
5.2.7 Breakaway of a segment
When diamond segments, slivers of steel or parts of your drilled material come away during drilling,
and prevent the core bit from drilling, abandon the hole and make another hole, with the same axis
of the first but with an larger diameter (15-20mm).
5.2.8 End of the drilling
When you have made the hole you want to drill:
Lift the core bit out of the hole.
Stop the motor by using the switch and not the P.R.C.D.
Stop the water supply.
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.
