Operation Instructions - Urrea RM838B Manual De Usuario

Variable speed is particularly useful when
starting the hammer drill. Also allows you to
set an optimal speed for any kind of job.
FORWARD/REVERSE SWITCH.
The forward/reverse switch determines the
running direction of the tool.
1. To select "forward" motion, release the
trigger switch, and push the forward/reverse
switch to the right side of the tool.
2. To select "reverse" motion, release the
trigger switch, and push the forward/reverse
switch to the left side of the tool.
WARNING: When switching speeds, make
sure to release the trigger and wait for the
hammer drill to stop.
NOTE: When you operate the tool in counter-
clockwise rotation, the switch trigger is pulled
only halfway and the tool runs at half speed.
For counterclockwise rotation, you cannot
push in the lock button.
ON/OFF SWITCH AND LOCK-ON BUTTON
TO START THE DRILL:
1. To turn the tool "ON", depress the trigger
switch. Increased pressure increases the speed.
2. To turn the tool "OFF", release the trigger
switch.
CAUTION: Allow the motor to come to a
complete stop before setting the drill down.
LOCK-ON FOR CONTINUOUS OPERATION:
The trigger switch is equipped with a lock-on
button.
1. To activate the lock-on feature, squeeze the
trigger switch to turn the tool "ON", and then
depress the lock-on button. The trigger switch
is locked "ON".
2. To disable the lock-on button and turn the
tool OFF, squeeze the trigger switch again.
The lock-on button will disengage. Release the
trigger switch to turn the tool "OFF".
FUNCTION SELECTOR
To select the percus-
sion function, place
the selector to the
left indicated with the
symbol.
To select the hammer
drill function for wood
12
and metal drilling, place the selector to the
right with the symbol.

OPERATION INSTRUCTIONS

DRILLING OPERATION
Hold the drill comfortably, with your finger
on the trigger switch. Use the auxiliary handle
whenever possible in order to gain extra con-
trol and to prevent fatigue.
NOTE:
• Use sharp drill bits only.
• For wood, use twist-drill bits, spade bits,
power-auger bits, or hole saws.
• For metal, use high-speed, steel-twist drill
bits or hole saws.
• For masonry (brick, cement, cinder block,
etc.) use carbide-tipped drill bits.
• Be sure that the material to be drilled is an-
chored or clamped firmly.
• If drilling thin material, use a "back-up" block
in order to prevent damage to the material.
TO BEGIN DRILLING
1. When starting a hole, make a mark on the
surface of the workpiece, and then drill a small
hole.
2. Hold the drill firmly with both hands.
3. Depress the trigger switch to start the drill,
gradually increasing speed. For continuous or
extended operation, hold the lock-On button
while pulling the trigger switch.
4. 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.
NOTE: If the drill begins to stall, reduce pres-
sure slightly in order to allow the bit to regain
speed. If the bit binds, reverse the motor to
free the bit from the workpiece.
5. After completing the drilling operation,
release the trigger switch, and allow the bit
to come to a complete stop before setting the
drill down.
6. When work has been completed, clean the
drill in order to allow for smooth operation of
the drill over time.
WARNING: To reduce the risk of injury, ne-
ver touch the bit in order to clean the debris
until the drill has stopped rotating and the bit
has cooled down.