MK Diamond MK-MANTA III - Manual (Page 11)

11
SECURING THE RIG: RECOMMENDED METHODS
Never use a extension cord smaller than shown in the chart. Be sure your ex-
tension cord is properly wired and in good electrical condition. Always replace
a damaged extension cord or have it repaired by a qualified electrician before
using it. Protect your extension cords from sharp objects, excessive heat and
damp or wet areas.
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. Always test
the anchor for firm attachment before drilling.
Do not drill if the gauge reads less than 20 PSI. Do not use vacuum base on
cracked, uneven, porous or vertical surfaces.
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 and tighten the lock nuts on the leveling screws 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.
B. VACUUM BASE. The MK-Manta III Comb Core Drill Rig is equipped with a vacuum pump. This
pump 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 con-
crete. 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 less, check the work surface for conditions which may interfere with adequate
suction such as cracks, dirt or debris on a porous surface.
Using an extension cord with inadequately sized wire causes drop in voltage,
resulting in loss of power and possible tool damage.
WARNING
WARNING
WARNING
NOTICE:
MANTA CORE DRILL III OPERATION
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. Specifications for the different motors are listed in the table
below.