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Drilling Large Diameter Holes with Core Bits
When drilling holes with large diameter core bits,
dust may build up in the cut and can cause the tool
to stall, bind, or cut slowly. By creating an opening
for the dust to escape, drilling time, bit stress, and
tool stress can be reduced.
1. Start the cut as normal.
2. Once the bit is firmly established
in the cut (about 1/4" deep),
remove the bit from the cut.
3. Remove the bit from the tool.
4. Install a standard fluted bit,
approximately 7/8" in diameter,
onto the tool.
5. Drill a perpendicular hole through
the kerf of the large hole.
• Depending on the location of
the work, the hole should either
break through the other side of
the hole/floor or extend 4"-5"
past the end of the workpiece
(such as into the dirt below a
concrete slab).
• If dust builds up in the hole,
vacuum it out and continue
drilling.
• If drilling through a wall, the
hole for dust should be drilled
on the lowest part of the large
hole kerf as the dust will fall
there when drilling and can be
evacuated more easily.
6. Reinstall the core bit and
continue drilling. Dust and
debris will fall through the
hole and optimize the cutting
ability of the bit.
NOTE: If unable to drill a hole
in the kerf, pull back on the bit
with the hammer running. This
will remove some of the dust
and debris from the cut. Re-
peat this for every inch of drill-
ing. If necessary, vacuum dust
and debris from the cut and
surrounding area.
7. For core bits, once the
maximum core bit depth
is drilled, the core must be
broken and removed.
• Install a chisel bit.
• Place the chisel into the
hole kerf.
• Chisel down into the
kerf at several points
until the core is
loose or broken.
• Remove the core
and vacuum/remove
any remaining dust
and debris.
• Install the core bit
and continue the cut.
MILWAUKEE Rotary Hammers may be used for
chipping and chiseling.
When chiseling, hold the tool at an angle to the
workpiece. Work from a corner or close to the edge
of the workpiece, breaking off one small area at a
time rather than attempting too large an area.
A variety of accessories are available.
Cut
approximately
1/4" deep with
a core bit.
Drill a hole
through the
work.
Top view
Dust and debris
will fall through
the hole.
any maintenance. Never disassemble the tool.
Contact a MILWAUKEE service facility for ALL
repairs.
Side view
Keep your tool in good repair by adopting a regular
of slab
maintenance program. Inspect your tool for issues
such as undue noise, misalignment or binding of
moving parts, breakage of parts, or any other condi-
tion that may affect the tool operation. Return the tool
to a MILWAUKEE service facility for repair. After six
months to one year, depending on use, return the
Pull bit out as far
tool to a MILWAUKEE service facility for inspection.
as possible once
or twice per inch
drilled.
never immerse your tool in liquid or allow a liquid
to flow inside it.
Clean dust and debris from any vents. Keep tool
clean, dry and free of oil or grease. Use only mild
soap and a damp cloth to clean, since certain clean-
ing agents and solvents are harmful to plastics and
other insulated parts. Some of these include gasoline,
turpentine, lacquer thinner, paint thinner, chlorinated
cleaning solvents, ammonia and household deter-
gents containing ammonia. Never use flammable or
combustible solvents around tools.
For repairs, return the tool to the nearest authorized
service center.
For a complete listing of accessories, go online to
www.milwaukeetool.com or contact a distributor.
6
Chiseling and Chipping
Bushing Tools
Used to surface concrete.
Mortar Cutting Chisels
(Seam Tools)
For removing old mortar for tuck
pointing or caulking.
Bull Points
For demolition work and starting
holes in concrete slabs.
Flat Chisels
For edging, chipping or channeling.
Scaling Chisels
For removing weld spatter or scale
and cutting straight lines.
Slotting Chisel
For slotting and cutting between
drilled holes in concrete and masonry.
MAINTENANCE
To reduce the risk of injury, always
WARNING
unplug the tool before performing
Maintaining Tools
To reduce the risk of personal in-
WARNING
jury, electric shock and damage,
Cleaning
Repairs
ACCESSORIES
Use only recommended accesso-
WARNING
ries. Others may be hazardous.
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