MK Diamond MK-MANTA IV - Manual (Page 6)

MANTA IV Core Drill Revision 08/06, Effective Date August 22, 2006
6
Set Up Instructions (cont...)
The slip clutch should absorb shock and excessive stress. It is the drill’s aid and not an absolute protection;
therefore, you have to drill carefully. In order to keep in good condition, the clutch should slip for a very
short time (max. 2 seconds) in each case. After excessive wearing, the clutch can be readjusted by an
authorized service shop.
Safety Clutch
Use a concrete anchor. Use either a 1/2 or /8 concrete anchor to secure the base to the work surface.
Always be sure to level the rig. Using a concrete anchor, insert a bolt through the slot located on the base
and tighten the bolt firmly in the anchor.
It is essential to always secure the rig to the work surface to help prevent personal injury and also to protect
the rig. An unsecured rig could rotate during drilling and possibly cause injury. It could also cause the bit to
chatter against the work surface or bind in a hole, which can fracture the diamond segments.
Fastening the Drill Rig
Adjust the flow of water with the ball valve to fully flush any excess material out of the bore hole.
If mud is depositing around the bore hole, increase the water flow.
In case the drill bit does not cut properly, use a grinding stone to sharpen it.
Make sure the drill bit does not vibrate.
Advance the tool according to bit diameter and machine power.
In case the drill bit gets jammed do not try to release it by switching the tool ON and OFF. Switch the tool
OFF immediately and remove the drill bit using an appropriate open-end wrench. Pull the tool out from the
hole with caution.
Drilling
The diamond drill bits with a 1-1/” UNC female thread can be screwed directly on the working spindle.
Always use drill bits that are appropriate for the material you will be drilling. You can extend the life of your
machine by using drill bits that are not damaged or deformed. Ensure that enough diamond is exposed in
every segment of the drill bit in order to make the drilling more effective.
Drill Bits
The drill bit has a right-hand thread. Use an open-end wrench SW 2 to hold the spindle in place.
Never hit the drill bit in order to remove it as the machine will be damaged.
If you want to remove the drill bit in an easier way, use grease in the drill bit thread.
Also, for easy removal of drill bit, a copper ring can be placed between the spindle and the drill bit.
Drill Bit Changing
When drilling holes that are longer than the core bit, follow the steps below.
1. Begin drilling the hole as usual. When you have drilled to the length of the bit, retract the bit from the hole
and turn off the motor and water as usual.
2. Break off the core by driving a chisel or slender wedge into the circular kerf. Remove the core using
core tongs, bent music wire or anchor bolts.
. After removing the core, insert the bit carefully into the hole, attach a bit extension to the bit and core drill
rig, then continue drilling as usual.
Deep Drilling