MK Diamond MK-MANTA II - Manual (Page 9)

8
Securing the Rig
Recommended
Methods
A. Use a concrete anchor. Use either a 1/2 or 5/8 concrete anchor to secure the
base to the work surface. Always be sure to level the rig before tightening the
anchor. 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.
B. Vacuum base. The MK-MANTA II Core Drill Rig is equipped with a vacuum
base. This base is designed to provide approximately 1800 pounds of total
holding power. In order to provide the most rigidity to your core rig the unit
should be used on a relatively smooth surface such as concrete. (If the surface
is too porous or rough the vacuum mount may not hold securely.)
1. Turn the vacuum pump on and step on the vacuum base until a
vacuum is created and the base adheres to the work surface.
2. Level the rig using the leveling bolts. Use a minimum amount of
adjustment to the leveling bolts to avoid breaking the vacuum seal.
The vacuum gauge should read approximately 25 pounds per square inch
(PSI) of pressure. If the gauge reads 20 PSI or less, check the work surface
for conditions which may interfere with adequate suction such as cracks, dirt or
debris on a porous surface.
Do not drill if the gauge reads less than 20 PSI. Do no use vacuum base on
cracked, uneven, porous or vertical surfaces.
C. Additional support. For added rigidity, you may use a telescoping extension
assembly in conjunction with a concrete anchor or vacuum base. To use a
telescoping assembly, first level the rig with the leveling screws. Secure the
rig with an anchor or the vacuum base. Place the top flange of the extension
against a ceiling or wall and place the other end on the jack screw of the
column. The assembly is adjustable up to 14 feet. Use the jack screw to tighten
the assembly and to make small adjustments.
The MK-MANTA II features two or three speed motors by various manufacturers.
Specifications for the different motors are listed in the following table.
WARNING
WARNING