4
5
OPERATION
WARNING
To reduce the risk of injury, always
wear safety goggles or glasses
with side shields.
To reduce the risk of injury, keep hands away
from the bit and moving parts.
Selecting Action
MILWAUKEE
Rotary Hammers have three settings:
rotation only, rotary hammer, and hammer only.
Always allow the motor to come to a complete stop
before changing the mode selection to avoid dam-
age to the tool.
1. For rotation only, rotate the mode
selector so the arrow on the lever
points to the twist drillsymbol.
2. For rotary hammering, rotate the
mode selector so the arrow points to
the hammer and twist drill
symbol.
3. For hammering only, rotate the
mode selector so the arrow points
to the hammer symbol.
4. To freely rotate the bit to the desired
angle for hammering only, rotate
the mode selector to the
symbol.
Then, follow step 3.
NOTE:
To engage the hammering
mechanism, maintain pressure on the bit. When
the pressure on the bit is released, the hammering
will stop.
Using the Control Switch
The control switch may be set to three positions:
forward, reverse and lock. Always allow the motor
to come to a complete stop before using the control
switch to avoid damage to the tool.
For
forward
(clockwise) rotation, push in the control
switch from the right side of the tool. Check the direc-
tion of rotation before use.
For
reverse
(counterclockwise) rotation, push in the
control switch from the left side of the tool. Check
direction of rotation before use.
To
lock
the trigger, push the control switch to the
center position. The trigger will not work while the
control switch is in the center locked position. Always
lock the trigger or remove the battery pack before
performing maintenance, changing accessories,
storing the tool and any time the tool is not in use.
Starting, Stopping and Controlling Speed
1. To
start
the tool, grasp the handle fi rmly and pull
the trigger.
2. To
vary
the speed, increase or decrease the pres-
sure on the trigger. The further the trigger is pulled,
the greater the speed.
3. To
stop
the tool, release the trigger. Make sure
the tool comes to a complete stop before laying
the tool down.
Operating
Position the tool, grasp the handles fi rmly and pull
the trigger. Always hold the tool securely using both
handles to maintain control. This tool has been de-
signed to achieve top performance with only moder-
ate pressure. Let the tool do the work.
If the speed begins to drop off when drilling large or
deep holes, pull the bit partially out of the hole while
the tool is running to help clear dust. Do not use water
to settle the dust since it will clog the bit fl utes and
tend to make the bit bind in the hole. If the bit should
bind, a built-in, non-adjustable slip clutch prevents
the bit from turning. If this occurs, stop the tool, free
the bit and begin again.
Cold Starting
If this tool is stored for a long period of time or
at cold temperatures, it may not hammer ini-
tially because the lubrication has become stiff.
To warm up the tool:
1. Insert and lock a bit or chisel into the tool.
2. Pull the trigger and apply force to the bit or chisel
against a concrete or wood surface for a few
seconds. Release the trigger
3. Repeat until the tool starts hammering. The colder
the tool is, the longer it will take to warm up.
Using Rotary Percussion Core Bits
Core Bits are useful for drilling large or long holes
in concrete. MILWAUKEE Heavy-Duty Core Bits
have heat-treated steel bodies with durable carbide
tips. These core bits are specially designed for fast,
accurate drilling with combined hammering and
rotary action.
1. Clean and lubricate the
threads on the adapter
and core bit to make
later removal easier.
Thread the adapter
shank to the rear of the
core bit.
2. Push the guide plate
onto the pointed end of
the center pin. Insert the
center pin and guide
plate assembly into the
core bit. Be sure the
small end of the center
pin is securely placed
into the hole in the cen-
ter of the core bit.
ASSEMBLY
WARNING
Recharge only with the charger
specifi ed for the battery. For spe-
cifi c charging instructions, read the operator’s
manual supplied with your charger and battery.
Removing/Inserting the Battery
To
remove
the battery, push in the release buttons
and pull the battery pack away from the tool.
WARNING
Always remove battery pack before
changing or removing accessories.
To
insert
the battery, slide the pack into the body
of the tool. Make sure it latches securely into place.
Adjusting the Side Handle Position
1. Loosen the side handle by unscrewing the side
handle grip until the side handle rotates freely.
2. Rotate the side handle to the desired position.
3. Tighten the side handle grip securely.
Setting the Depth Gauge
1. Press in the clamping lever.
2. Slide the depth gauge rod backward or forward
until it is set for the desired depth.
NOTE:
The drilling depth is the distance between
the tip of the bit and the tip of the depth gauge rod.
3. Release the clamping lever.
Drilling Depth
Installing Drill Bits and Chisels
NOTE:
Only use accessories with SDS or SDS Plus
shanks.
Be sure that the shank of the bit is clean. Dirt particles
may cause the bit to line up improperly. Do not use
bits larger than the maximum recommended capacity
of the drill because gear damage or motor overload-
ing may result. For best performance, be sure that
the bit is properly sharpened and the shank is lightly
greased before use.
1. Remove battery pack
2. Insert the bit or chisel into the nose of the tool.
3. Rotate bit slowly until it aligns with the locking
mechanism.
4. Push bit into tool until it locks.
5. Check that the bit is locked properly; it should be
possible to pull the bit back and forth slightly (about
1/4").
6. To remove bits and chisels, pull bit holder release
collar toward the rear of tool and remove bit.
NOTE:
Use caution when handling hot bits and
chisels.
For LHS systems, screw the threaded end of the
centering bit into the core bit.
NOTE:
If using an extension, first thread the
adapter shank to the extension. Then thread the
core bit to the extension.
3. Insert the adapter into the nose of the tool as
described in “Installing Bits and Chisels”. Set the
knob to the "hammering with rotation" setting.
4. Press the centering bit fi rmly against your center
mark, hold the tool fi rmly and pull the trigger.
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 drilling 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). Resume 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.
Setting Self-Drilling Anchors
MILWAUKEE Tooth Anchor Chucks require a “B”
taper adapter.
1. Place the proper size tooth anchor chuck into the
“B” taper adapter. Then insert the “B” taper adapter
into the tool and lock it into place as described.
See “Installing Bits and Chisels”.
2. Insert the anchor into
1/8"
the tooth anchor chuck.
Set the knob for ham-
mering only. Set the
anchor on your mark
and hammer until the
teeth have penetrated
the concrete.
3. Set the knob for ham-
mering with rotation
and drill until the chuck
is 1/8" above the con-
crete.
NOTE:
It may be nec-
essary to clean dust
and cuttings from the
anchor several times
while drilling the hole.
4. Remove the anchor
from the hole while the
tool is running. Clean
the dust and cuttings
from the anchor by
pointing it downward
and turning the tool on
and off several times. Clean the dust out of the
hole with a vacuum cleaner or blowout bulb.
5. Place the expansion plug into the anchor and insert
the anchor into the hole. Switch the knob back to
hammering only, and hammer the anchor fi rmly
into the hole.
