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PAGE 16 —CDM1H CORE DRILL — OPERATION AND PARTS MANUAL — REV. #6 (09/08/10)
CDM1H HAND-HELD CORE DRILL — OPERATION
Before Operating
1. Place the valve on the water source to the ON position, and
then turn the water valve on the core drill (Figure 8) to the
ON position (down). Verify that water is flowing smoothly
and evenly.
This core drill can whip violently if it comes in contact with
rebar or coarse material which would cause the shaft to
bind. Be extremely careful at all times when drilling. The
possibility exists of the core drill severely twisting the wrist
or striking the body with excessive force.
Warning - Binding of Output Shaft
Figure 11. Wall Drilling Application
Figure 12. Floor Drilling Application
NEVER use the adjustable shoulder stock to
pull the bit out of the ground if the bit gets stuck
in the hole.
ALWAYS be on the lookout for exposed wiring
or buried electrical connections when drilling.
ALWAYS drill with uniform pressure and keep
the bit straight. When drilling through steel
rebar, reduce the pressure to avoid overloading
the motor.
2. If water is not flowing, check all connections and correct the
problem.
3. Place the core drill against the surface (Figures 9 and 10) to
be drilled. Hold drill firmly, and squeeze the power ON/OFF
switch to begin drilling.
DO NOT overreach. Keep proper footing and
balance at all times. Proper footing and
balance enables better control of the core drill
in unexpected situations.
Figure 10. Water Valve (ON Position)