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1. For drilling, turn the hammer-drill lever to the drill symbol .
2. For hammer-drilling, turn the hammer-drill lever to the
hammer symbol .
NOTE: To engage the hammering mechanism, maintain pressure on
the bit. When pressure on the bit is released, the hammering action
will stop.
Using Forward/Reverse Lever (Fig. 6)
The forward/reverse lever can only be adjusted when the trigger is not
pressed. Always allow the motor to come to a complete stop before
using the forward/reverse lever.
Selecting Action
MILWAUKEE Hammer-Drills have two settings: drilling and
hammer-drilling.
Selecting Speed (Cat. No. 5387-20 only)
The speed can only be changed when the tool is at a complete stop.
1. For high torque/low speed (up to 1000 rpm), turn the speed
selector to position 1.
2. For low torque/high speed (up to 2500 rpm), turn the speed
selector to position 2.
Starting, Stopping & Controlling Speed
1. To start the tool, pull trigger.
2. To stop the tool, release trigger.
3. To vary the speed, increase or decrease pressure to trigger. The
further the trigger is pulled, the greater the speed.
Operating
Position the tool, grasp the handles firmly and pull the trigger. Always
hold or brace the tool securely using both handles and maintain control.
This tool has been designed to achieve top performance with only mod-
erate pressure. Let the tool do the work.
If the speed begins to drop off when drilling 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.
WARNING!
To reduce the risk of injury, wear safety goggles or glasses
with side shields. Unplug the tool before changing
accessories or making adjustments.
1. For forward (clockwise) rotation, push the forward/reverse lever
to the left (when viewed from the back of the tool) as shown.
2. For reverse (counterclockwise) rotation, push the forward/reverse
lever to the right (when viewed from the back of the tool) as shown.
Allow the motor to come to a full stop before reversing.
NOTE: When hammer-drilling, use the tool in forward rotation (clock-
wise) only.
OPERATION
Fig. 6
Forward
Reverse
APPLICATIONS
Drilling in Wood, Composition Materials and Plastic
When drilling in wood, composition materials and plastic, select the drill
operating mode. Start the drill slowly, gradually increasing speed as you
drill. Select low speeds for plastics with a low melting point.
Drilling in Metal
When drilling in metal, select the drill operating mode. Use high speed
steel twist drills or hole saws. Use a center punch to start the hole.
Lubricate drill bits with cutting oil when drilling in iron or steel. Use a
coolant when drilling in nonferrous metals such as copper, brass or
aluminum. Back the material to prevent binding and distortion on break-
through.
Drilling in Masonry
When drilling in masonry, select the hammer-drill operating mode. Use
high speed carbide-tipped bits. Drilling soft masonry materials such as
cinder block requires little pressure. Hard materials like concrete require
more pressure. A smooth, even flow of dust indicates the proper drilling
rate. Do not let the bit spin in the hole without cutting. Do not use water
to settle dust or to cool bit. Do not attempt to drill through steel reinforcing
rods. Both actions will damage the carbide.
WARNING!
To reduce the risk of electric shock, check work area for
hidden pipes and wires before drilling.