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VERS.2015.04.21
5.2.4 Slanting holes
You can incline the rig to make slanting holes:
Remove the screw on the front of the rig, and loosen the two screws on the side of the
rig. Keep the front screw, as you will have to reassemble it next you want to use the rig
perpendicularly to the surface.
Loosen the locking handle on the brace bracket.
Adjust the rig until you reached the required angle.
Retighten the two screws on the side of the rig.
Start drilling very slowly because the bit attacks the drilled material only with a little part of its
cutting surface, even with only one of its diamond segments. By drilling slowly, you avoid
misalignment of the core bit.
5.2.5 Drilling of steel rods in reinforced concrete
When you see that:
The core bit goes ahead very slowly.
The force you have to make on the hand wheel increases.
The water going out of the hole is clear and there are some metallic splints in it.
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.
CDR 252_MAN_EN
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