Use and Care Manual

5
To extend core bit life:
• Choose the right bit for the job. Take into account
the size, aggregate, sand, etc.
• When using a new bit, use light feed pressure for
the rst 2 or 3 holes, so the new diamond gradually
breaks in.
• Feed bits very slowly onto the work surface. Use light
feed pressure until the bit crown has penetrated or
"seated" into the material.
• If the core bit encounters embedded steel, slow
down the feed pressure and let the bit core at its
own pace. Don't force the bit. Typically, the water
around the bit will clear when embedded steel is
encountered.
• Minimize all vibration. Slow the feed rate when
necessary. Vibration will cause severe diamond
breakage or pullout.
• Use sharp bits.
WARNING
To reduce the risk of injury, when
working in dusty situations, wear
appropriate respiratory protection or use an
OSHA compliant dust extraction solution.
When drilling with water, route the water away
from the work area or use a liquid collection de-
vice to keep work area dry and reduce the risk of
electrical shock. Do not allow water to ow inside
machine or battery pack.
Water Supply
Water provides several benets during coring:
• Water acts as a coolant, eliminating the heat caused
by the friction of the coring action. This preserves
the integrity of the diamonds, the bond matrix, the
segment solder, and core tube. Without a coolant,
the heat buildup during coring can cause all of these
components to fail.
• Water ushes loose, abrasive particles created
during coring. These particles consist of aggregate,
sand, diamond particles and various metals from
embedded steel and the core bit matrix. The hole
must be free of debris to allow the core bit to work.
If loose particles are not properly ushed from the
hole, an unnecessary drag will occur along the side
of the core barrel. This can contribute to bit glazing
through lack of power as well as motor damage
through amperage increases due to bit resistance.
In addition, loose particles tend to wear the bit tube,
which can eventually result in the loss of segments.
• Water keeps dust down and makes for a cleaner,
healthier workplace. WARNING! Always use an
OSHA compliant dust extraction solution.
To prevent visible dust, an adequate supply of water
must ow freely and constantly during the entire cut.
These core drills have a built-in water system to
allow water to ow down the inside and up around
the outside of the bit. WARNING! When drilling with
water, route the water away from the work area or
use a liquid collection device to keep work area dry
and reduce the risk of electrical shock.
1. Use only clean water at less than 90 psi.
2. Connect a standard quick-connect tting to a
garden hose and snap it onto the core drill's tting.
3. Do not use hoses that are distorted, worn or
damaged.
4. Use the water valve to turn the water supply on
and o󰀨 when coring.
WARNING
To reduce the risk of injury, always
use a side handle during handheld
operations. Always brace or hold securely. En-
sure side handle is tightened securely before
each use. Always be prepared for bit binding and
core drill reaction.
Adjusting the Side Handle
The side handle can be used at the front of the ma-
chine in any orientation, or mid-machine in one of
the side handle locations.
To install the side handle on the core drill collar:
1. Loosen the side handle grip until the side handle
ring can be pushed onto the core drill collar.
2. Position the side handle as desired.
3. Rotate collar slightly to ensure the detent snaps
into place.
4. Hand tighten the side handle grip securely.
To install the side handle into a side handle location:
1. Unscrew the side handle grip completely from the
side handle ring.
2. Select the desired side handle location and thread-
in the side handle grip.
3. Hand tighten the side handle grip securely.
Mounting the Core Drill to a Stand
WARNING
Always remove battery pack before
installing the core drill on a stand .
1. Install the core drill onto the stand according to
the core drill stand instructions. MILWAUKEE rec-
ommends using a MILWAUKEE Core Drill stand
(Cat. No. 3000) with this machine. A MILWAUKEE
MX FUEL
™
Core Drill adapter (Cat. No. 49-67-0105)
is available for securing this core drill to older
styles of MILWAUKEE core stands.
2. After the core drill is mounted, ensure the carrier
is rigid against the mast. A loose carrier can al-
low the core drill or bit to wobbling during coring.
Wiggle the core drill front to back and side to side.
If it moves, adjust according to the core drill stand
instructions.
3. Before use, secure the core drill and stand using
a vacuum pad, expansion bolts, or other recom-
mended method. WARNING! Do not rely on the
weight of the stand, shoring pin alone, or body
weight on the stand for securing during use. The
stand will rotate and cause injury.
4. To remove core drill, disconnect according to the
core drill stand instructions.