MK Diamond MK-MANTA III - Manual (Page 14)

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Bits with permanently attached adapters simply screw directly onto the threads of the drill spindle.
Ensure that the end of the bit butts up squarely against the shoulder on the spindle.
When drilling through concrete floors, the core will generally drop from the diamond bit. Caution
should be provided for people and property below the drilling area.
The MK-Manta III Core Drill, equipped with either the Millwaukee motor, has
a 1 -1/4” - 7 thread. For bits with other threads, use a shaft coupling. After a
bit has been mounted, turn the power on and check that there is a minimum
of run-out or wobble.
To reduce the risk of injury, always unplug tool before attaching or removing
accessories. Only use specifically recommended accessories. Others may
be hazardous.
If using the vacuum base, do not continue operations unless the vacuum
gauge reads more than 20 PSI. Normally, the gauge will read 23 inches or
more.
Grease the bit threads to help prevent the bit from seizing on the spindle due
to surface corrosion.
To prevent the bit from wandering, always use a light lead to start the hole
and wait for the diamond tip of the bit to penetrate the work surface before
increasing the load.
• Thread anti-clockwise to attach core bit.
• Thread clockwise to loosen.
MOUNTING BITS
DRILLING PROCEDURE
WARNING
WARNING
WARNING
NOTE:
NOTE:
1. Ensure that you have read and fully understand the complete operation of the Manta III
Core Drill you have purchased prior to commencing drilling operations.
2. Select and install a diamond core bit appropriate for the job.
3. Select either high or low gear speed according to the chart in the Drilling Speeds section of
this manual. (Do not shift speed when motor is on.)
4. Connect water hose to water swivel.
5. Secure the rig as described in the Securing the Rig section of this manual.
6. Turn the motor switch on the control box on. Turn the water on so that an adequate flow
of water is supplied through the water swivel to the bit. Hold the sliding handle and slightly
loosen the carriage lock knob. Slowly rotate the handle to lower the bit into the work piece -
apply steady even pressure.
7. Use consistent pressure so that the bit cuts consistently, Insufficient pressure will cause
the diamond core bit to glaze over. Too much pressure will overload the motor and crush
the diamonds. Use the ammeter on the control box as a guide for proper pressure.
MANTA CORE DRILL III OPERATION