Side View - Milwaukee 5426-21 Manual Del Operador

5. After drilling to about the depth of the core bit teeth,
remove the center pin and guide plate from the
core bit. Resume drilling.
6. To change the core bit, hold the tool upwards,
pointing it away from your body, and run the tool
allowing rotation and impacting for about five sec-
onds to loosen the core bit from the adapter shank.
NOTE: To make deeper holes, remove the core
bit, break and remove the core. Resume drilling.
When drilling long or deep holes, after each inch
of penetration pull the bit partially out of the hole
while the tool is running, to help clear dust from
the bit flutes. Dust can clog the bit flutes and can
make the bit bind in the hole. If this occurs, stop
the tool, free the bit and begin again.
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 estab-
lished 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 diam-
eter, 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
dril-led 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 abil-
ity of the bit.
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.

Side view

of slab
7
NOTE: If unable to drill a hole
in the kerf, pull back on the
bit with the hammer run-
ning. This will remove some
of the dust and debris from
the cut. Repeat this for ev-
ery inch of drilling. If neces-
sary, vacuum dust and de-
bris from the cut and sur-
rounding 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.
MAINTENANCE
To reduce the risk of injury, always
WARNING
unplug the tool before performing
any maintenance. Never disassemble the tool.
Contact a MILWAUKEE service facility for ALL
repairs.
Maintaining Tools
Keep your tool in good repair by adopting a regular
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
tool to a MILWAUKEE service facility for inspection.
To reduce the risk of personal in-
WARNING
jury, electric shock and damage,
never immerse your tool in liquid or allow a liquid
to flow inside it.
Cleaning
Clean dust and debris from vents. Keep handles
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 service
center.
ACCESSORIES
Use only recommended accesso-
WARNING
ries. Others may be hazardous.
For a complete listing of accessories, go online to
www.milwaukeetool.com or contact a distributor.
Pull bit out as far as
possible once or twice
per inch drilled.
Repairs