Milwaukee Tool 5268-21 - Manual (Page 4)

6 7
Cut
approximately
1/4" deep with
a core bit.
Side view
of slab
Pull bit out as far
as possible once
or twice per inch
drilled.
Drill a hole
through the
work.
Dust and debris
will fall through
the hole.
Top view
NOTE: If the 48-20-
5099 threaded stud is
used, or a center pin
and guide plate are
not available, use a
template or notched
board to start the hole.
5. Start the tool. After drill-
ing to about the depth
of the core bit teeth,
remove the center pin
and guide plate from
the core bit (not necesary for LHS system). Re-
sume drilling.
6. To change the core bit, hold the tool upwards,
pointing it away from your body, and run it briefl y
in forward to loosen the core bit from the adapter.
NOTE: To make deeper holes, remove the core bit,
break and remove the core, then 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 fl utes. Dust can clog the bit fl utes 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 fi rmly 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 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/fl oor 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.
Chiseling and Chipping
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.
• 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 cut-
ting 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.
Repeat this for every inch of
drilling. 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
b r o k e n a n d r e -
moved.
• 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.
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.
ACCESSORIES
WARNING To reduce the risk of injury,
always unplug the tool before attaching or
removing accessories. Use only specifi cally
recommended accessories. Others may be
hazardous.
For a complete listing of accessories refer to your
MILWAUKEE Electric Tool catalog or go on-line
to www.milwaukeetool.com. To obtain a catalog,
contact your local distributor or a service center.
MAINTENANCE
Maintaining Tools
Keep your tool in good repair by adopting a regular
maintenance program. Before use, examine the
general condition of your tool. Inspect guards,
switches, tool cord set and extension cord for
damage. Check for loose screws, misalignment,
binding of moving parts, improper mounting, bro-
ken parts and any other condition that may affect
its safe operation. If abnormal noise or vibration
occurs, turn the tool off immediately and have the
problem corrected before further use. Do not use a
damaged tool. Tag damaged tools “DO NOT USE”
until repaired (see “Repairs”).
Under normal conditions, relubrication is not neces-
sary until the motor brushes need to be replaced.
After six months to one year, depending on use,
return your tool to the nearest MILWAUKEE service
facility for the following:
• Lubrication
• Brush inspection and replacement
• Mechanical inspection and cleaning (gears,
spindles, bearings, housing, etc.)
• Electrical inspection (switch, cord, armature, etc.)
• Testing to assure proper mechanical and electrical
operation
Cleaning
Clean dust and debris from vents. Keep the tool
handles clean, dry and free of oil or grease. Use
only mild soap and a damp cloth to clean your tool
since certain cleaning agents and solvents are
harmful to plastics and other insulated parts. Some
of these include: gasoline, turpentine, lacquer thin-
ner, paint thinner, chlorinated cleaning solvents,
ammonia and household detergents containing
ammonia. Never use fl ammable or combustible
solvents around tools.
Repairs
If your tool is damaged, return the entire tool to the
nearest service center.
WARNING To reduce the risk of injury,
always unplug your tool before performing
any maintenance. Never disassemble the tool
or try to do any rewiring on the tool’s electrical
system. Contact a MILWAUKEE service facility
for ALL repairs.
WARNING To reduce the risk of injury,
electric shock and damage to the tool, never
immerse your tool in liquid or allow a liquid
to fl ow inside the tool.