Filter
Top Products
8
9
3. Insert the adapter into the nose of the tool (see
“Installing Bits and Chisels”. Set the action selec-
tor to the hammering-with-rotation setting.
4. Press the center pin fi rmly against your center
mark, hold the tool fi rmly and pull the trigger (Fig. 6).
NOTE: If a center
pin and guide plate
are not available,
use a template or
notched board to
start the hole (Fig. 7).
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 rota-
tion and impacting
for about fi ve sec-
onds to loosen the
core bit from the
adapter shank.
NOTE: To make
deeper holes, re-
move the core bit,
break and remove
the core. Resume
drilling. When drill-
ing 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.
Fig. 5
Fig. 6
Fig. 7
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 established in the cut (about
1/4" deep), remove the bit from the cut (Fig. 8).
Fig. 8
Cut approximately
1/4" deep with a
core bit.
3. Remove the bit from
the tool.
4. Install a standard fl ut-
ed bit, approximately
7/8" in diameter, onto
the tool.
5.
Drill a perpendicular
hole through the kerf of
the large hole (Fig. 9).
• Depending on the
location of the work,
the hole should ei-
ther 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 (Fig.
9) as the dust will fall
there when drilling
and can be evacu-
ated more easily.
6. Reinstall the core bit
and continue drilling
(Fig. 10 & 11). Dust
and debris will fall
through the hole and
optimize the cutting
ability of the bit.
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 (Fig. 12).
• 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.
NOTE: If unable to drill a
hole in the kerf, pull back
on the bit with the ham-
mer running (Fig. 13).
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.
Fig. 9
Drill a hole
through the
work.
Fig. 10
Dust and debris will fall
through the hole.
Top view
Fig. 11
Side view
of slab
Fig. 13
Pull bit out as far as
possible once or twice
per inch drilled.
Fig. 12
Chiseling and Chipping
These MILWAUKEE 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.
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.
NOTE: Use MILWAUKEE core bits Cat. No. 48-20-
5125 through 48-20-5165. Do not use LHS (Large
Hole System) Components with rotary hammers
5340-20 and 5342-20. The bits could fail, breaking
apart at the threaded stud and causing injury and
property damage.
ACCESSORIES
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.
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.
Thick Wall Carbide-Tipped Core Bits
Core Body with Guide Plate and Centering Pin
Cat. No. Diameter Drilling Depth
48-20-5125
48-20-5130
48-20-5135
48-20-5140
48-20-5145
48-20-5150
48-20-5155
48-20-5160
48-20-5165
1-1/2"
1-3/4"
2"
2-1/2"
3"
3-1/2"
4"
5"
6"
4-1/16"
4-1/16"
4-1/16"
4-1/16"
4-1/16"
4-1/16"
4-1/16"
4-1/16"
4-1/16"
MAINTENANCE
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.
Maintaining Tools
Keep your tool in good repair by adopting a regular
maintenance program. Before use, examine the gen-
eral 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, broken 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
Maintaining Hammer Chisels
Through normal use, the shank of the chisel can
"mushroom" over and cause the chisel to become
stuck inside the hammer. To prevent this from hap-
pening, periodically remove the chisel from the tool
and inspect the shank. If the shank starts to "mush-
room", have the chisel refurbished or replaced.
Brush Replacement
These MILWAUKEE hammers are will automatically
shut off when the brushes need to be replaced. Re-
turn your tool to the nearest MILWAUKEE service
facility for repairs.
Service Indicator Light
These MILWAUKEE Hammers feature a service
indicator light. When the red light turns on, the
tool is in need of servicing. Return your tool to the
nearest MILWAUKEE service facility for service.
NOTE: When the service light comes on, the tool
will continue to run for a few hours and then the
motor will shut off.
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
thinner, 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,
electric shock and damage to the tool, never
immerse your tool in liquid or allow a liquid
to fl ow inside the tool.