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8
MANTA I
Revision 03/05, Effective Date March 2, 2005
9
MANTA I
Revision 03/05, Effective Date March 2, 2005
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. 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 I 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 I features two speed motors by Milwaukee and a three speed
motor by Eibenstock. Specifications for the different motors are listed in the
following table.
WARNING
!
WARNING
!