10
THE SWITCH
The machine has a lockable trigger switch. Squeeze the trigger to start the
machine. To lock the switch on, press the lock button while holding the
trigger switch on. To release, squeeze the trigger and release.
WARNING: Never lock the switch on when drilling hand-held. Only
lock the switch on when mounted to a rig.
OVERLOAD PROTECTION AND OVERHEAT PROTECTION
Overload Warning System:
When the load reaches overload conditions, the warning system will kick in, lowering the voltage and causing
the motor to stop. Simply back off the downward pressure to ease the load and the motor will automatically
restart. Then the operator can continue to drill normally.
Overload:
If the excessive load is sustained too long, the motor will shut down completely. In this case, the motor must be
restarted by turning OFF and then back ON the switch. When this happens, the motor will very likely be near
overheating, so it is also a good idea to run the motor at no load for a few minutes to cool it before continuing.
Overheat Thermal Protection:
If the temperature of the motor gets too high, the thermal protection will shut the motor down. When this
happens, do not immediately put a load on the motor after restarting. Always run the machine at no load for a
few minutes to return to a normal operating temperature before continuing.
CAUTION: The motor will be damaged if it is repeatedly overloaded or overheated. Always cool the
motor by running at no load for a few minutes whenever it stops from either overheat or overload.
SAFETY CLUTCH
This machine is equipped with a mechanical clutch to protect the operator and machine from excessive torque
forces. When the preset maximum torque level is reached, the clutch will slip. 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.
DIAMOND CORE DRILLING
WARNING: When coring through a floor, the core will fall down. Take precautions to avoid injury or
damage below.
NOTE: When drilling with a new bit for the first time, use less than normal feed pressure for a time
until it breaks-in.
1.
Squeeze the trigger switch to turn the machine on. (For wet drilling and convertible models, press the
Trigger Switch
Lock Button
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