AGP DM6P Bedienungsanleitung Seite 10

6) SAFETY CLUTCH
This machine is equipped with a mechanical clutch to protect the operator and machine from excessive torque
forces. After the clutch slips many times, it will become worn and slip at lower and lower torque levels. When
this happens, it must be serviced by an authorized service provider. The recommended torque of the clutch
nut is 21 Nm.
7) DIAMOND CORE DRILLING
1.
Press the "Reset" button on the PRCD interrupter device to energize the circuit to the machine. Then
squeeze the trigger switch to turn the machine on.
2.
Open the water valve slightly and very gently begin the cut. If holding by hand, start the cut by
approaching at an angle of about 30 degrees to the cutting surface. (A large piece of wood with a large V
notch cut in it will help prevent the bit from wandering at the beginning.) Once about a third of the arc is
cut, straighten the bit to the correct perpendicular angle while keeping enough feed pressure on the bit
to prevent it from wandering.
3.
Make adjustments to the water feed as needed. The water leaving the cut should be a solid colored
slurry with about the consistency of milk.
4.
Once in the cut, use steady feed pressure .
5.
When breaking through, hold the machine tightly and reduce feed pressure .
WARNING: Always keep your face away from the machine.
The diamond impregnated segments in a wet type (sintered) diamond core bit operate on a principle of
controlled erosion. The bond matrix holding the diamonds is continually worn away by abrasion with the
work piece, exposing the harder diamonds to stand proud from the bond matrix.
Without adequate water, the bit would overheat and be destroyed.
With too much water and not enough feed pressure, there would not be adequate erosion of the bond
matrix and the bit becomes dull . This is called glazing . If the bit seems to refuse to cut anymore, it is
glazed. See below: "SHARPENING A GLAZED BIT "
Don't feed too gently or the diamond segments will become glazed. Keep the bit steadily working.
If holding by hand, take great care to keep the bit aligned to the hole. If the bit is crooked, it will easily bind.
If the cut is very deep, the core plug may be obstructing the flow of cooling water. In this case, stop drilling, and
chisel out the core plug before continuing.
CAUTION: If the bit gets stuck, do not try to rock it loose by turning the switch on and off. That is
hazardous and could damage the motor. Rather, unplug the machine and use a wrench on the bit
mounting to work it loose.
If embedded steel such as rebar is encountered take special care. Reduce the feed pressure by about 1/3
and let the bit go at its own pace, if there is too much vibration the bit will be destroyed.
Once the steel is passed, continue normally.
CAUTION: Drilling operations are very stressful to the motor and at the end of the cut, the motor
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