Milwaukee 5517-20 Manuel De L'utilisateur page 6

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 flutes 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.
NOTE: Applying greater pressure does not increase
the tool's effectiveness. If the applied working pres-
sure is too high, the shock absorber will be pushed
together making the vibrations to the handle notice-
ably stronger.
Operator Force
The Anti-Vibration System provides the operator with
comfort without sacrificing power or performance.
Ideal operator force compresses the bellows slightly
and allows the tool to work aggressively while the
handle remains steady.
Excessive force compresses the bellows significantly
and reduces vibration dampening. Users will be able
to feel the difference and should adjust the force to
the handle accordingly.
Too little
force
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.
Correct Too much
force force
APPLICATIONS
To reduce the risk of electric shock,
WARNING
check work area for hidden pipes
and wires before drilling.
Cut embedded rebar only if this operation does
not affect the integrity of the building. If in doubt,
consult a structural engineer. Tool operator fully
responsible for adverse structural effects.
Selecting Bits
When selecting a bit, use the right type for your job.
For best performance, always use sharp bits.
1. Before drilling, be sure the workpiece is clamped
securely. Use backing material to prevent damage
to the workpiece during breakthrough.
2. When starting a hole, place the drill bit on the work
surface and apply firm pressure. Begin drilling at
a slow speed, gradually increasing the speed as
you drill.
3. Always apply pressure in line with the bit. Use
enough pressure to keep the drill biting, but do
not push hard enough to stall the motor.
4. Reduce pressure and ease the bit through the last
part of the hole. While the tool is still running, pull
the bit out of the hole to prevent jamming.
Using Rotary Percussion Core Bits
Core Bits are useful for drilling large or long holes
(LHS) 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. 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.
2. Press the centering bit firmly against your center
mark, hold the tool firmly and pull the trigger.
3. To change the core bit, hold the tool upwards,
pointing it away from your body, and run it briefly
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
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.
6
Drilling