MK-2000P Revision 4/01, Effective Date April 19, 2001 Page 3
MK-2000P Operating Instructions (Part Number 158490)
ON/OFF Switch
The MK-2000P is equipped with an electronic ON/OFF switch.
Each time the switch is pressed, the speed of the drill becomes higher. This allows very precise drilling.
Under normal working conditions, always operate the MK-2000P at maximum speed.
Gear Shifting
The speed of the drill will need to be adjusted in accordance with the size of the core bit being used.
The speed of the drill is adjusted by rotating the Speed-selector in the clockwise direction, while turning the
drill shaft by hand until the clutch is engaged.
If the Speed-selector is in the “o” position, drill speed can be adjusted from 0 to 1000 rpm.
If the Speed-selector is in the “oo” position, drill speed can be adjusted from 0 to 2000 rpm.
For core bits with diameters above 2.8 in. / 70 mm, operate the drill using the “o” (0 to 1000) rpm range.
For core bits with diameters below 2.8 in. / 70 mm, operate the drill using the “oo” (0 to 2000) rpm range.
1. When using the handheld method, operate the drill in the 0 to 2000 rpm range only.
2. Always check the core bit manufactures recommendation for use.
3. Gear shifting should only be performed in the clockwise direction when the drill is stopped.
Starting a Hole
It is easier to start a hole with a centering bit. The switch allows the drill to be operated at slow speed for
safely introducing the bit into the material. A normal pilot hole should be from .2 to.4 inches (5 to 10 mm) in
depth. Once the pilot hole is created, the centering bit can be removed and replaced for full speed operation.
Overload Protection:
To protect the operator and the drill, the MK-2000P is equipped with three overload protective devices –
mechanical, electronic and thermal. In case of overload, the MK-2000P is equipped with a warning device.
Mechanical Overload Protection
If the core bit is suddenly blocked in the hole, a clutch will slip disengaging the bit from the motor.
Electronic Overload Protection
If excessive penetration speed results in an overload condition, an electronic switch will open disconnecting
the motor from the power supply.
Once the drill is removed from the hole and the electronic switch is reset, coring may resume.
Thermal Overload Protection
If the drill is operated in a continuous overload condition and the Electronic Overload Protective devise fails,
the Thermal Overload protective device with interrupt power to the motor.
Once actuated, the motor must be allowed to cool to reset the Thermal Overload protective device. Time
required for the Thermal Overload protective device to reset will vary depending on the temperature of the
motor and ambient temperature.
Acoustic Overload Warning
In case of overload, a continuous acoustic warning signal will sound.
When the Acoustic Overload Warning is heard, it is recommended that the operating speed and applied
pressure be immediately reduced, and/or, the core bit be operated under a no-load condition.
NOTE: If the MK-2000P stops due to the activation of one of the overload protective devices, this should not
be considered an equipment failure.
