Berner BRD-S-1 Traducido De Las Instrucciones Originales página 24

ENGLISH
adjustments or removing/installing
attachments or accessories.
Proper Hand Position (fi g. 1, 3)
WARNING: To reduce the risk of
serious personal injury, ALWAYS
use proper hand position as shown
in figure 3.
WARNING: To reduce the risk of
serious personal injury, ALWAYS hold
securely in anticipation of a sudden
reaction.
Proper hand position requires one hand under
the the housing, with the other hand on the main
handle (e).
Switches (fi g. 1, 2)
To start the drill, depress the trigger switch; to stop
the drill, release the trigger.
A variable speed trigger switch (a) permits speed
control—the farther the trigger is depressed, the
higher the speed of the drill.
For continuous operation, press and hold the
variable speed switch, move the lock-on button (b)
up, then release the switch.
NOTE: Use lower speeds for starting holes without
a center punch, drilling in metal or plastics, driving
screws or drilling ceramics. Higher speeds are
better for drilling wood and composition boards and
using abrasive and polishing accessories.
The forward/reverse lever (c) is used for
withdrawing bits from tight holes and removing
screws. It is located above the trigger switch.
To reverse the motor, release the trigger switch
FIRST and then push the lever to the right. After
any reversing operations, return lever to forward
position.
To stop continuous operation, press the switch
briefly and release it. Always switch the tool off
when work is finished and before unplugging.
Drilling
WARNING: To reduce the risk of
personal injury, ALWAYS ensure
workpiece is anchored or clamped
firmly. If drilling thin material, use
a wood "back-up" block to prevent
damage to the material.
1. Use sharp drill bits only. For WOOD, use twist
drill bits, spade bits, power auger bits, or hole
saws. For METAL, use steel twist drill bits or
hole saws.
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BERNER_332502_COMBINED.indd Sec1:24
2. Always apply pressure in a straight line with
the bit. Use enough pressure to keep drill
biting, but do not push hard enough to stall
the motor or deflect the bit.
3. Hold tool firmly with both hands to control the
twisting action of the drill.
4. IF DRILL STALLS, it is usually because
it is being overloaded or improperly used.
RELEASE TRIGGER IMMEDIATELY, remove
drill bit from work, and determine cause of
stalling. DO NOT CLICK TRIGGER ON
AND OFF IN AN ATTEMPT TO START A
STALLED DRILL — THIS CAN DAMAGE
THE DRILL.
5. To minimize stalling or breaking through the
material, reduce pressure on drill and ease the
bit through the last fractional part of the hole.
6. Keep the motor running when pulling the bit
back out of a drilled hole. This will help prevent
jamming.
7. With variable speed drills there is no need
to center punch the point to be drilled. Use a
slow speed to start the hole and accelerate
by squeezing the trigger harder when the
hole is deep enough to drill without the bit
skipping out.
DRILLING IN METAL
Start drilling with slow speed and increase to full
power while applying firm pressure on the tool.
A smooth even flow of metal chips indicates the
proper drilling rate. Use a cutting lubricant when
drilling metals. The exceptions are cast iron and
brass which should be drilled dry.
NOTE: Large [5/16" (8 mm) to 1/2" (13 mm)] holes
in steel can be made easier if a pilot hole [5/32"
(4 mm) to 3/16" (5 mm)] is drilled first.
DRILLING IN WOOD
Start drilling with slow speed and increase to full
power while applying firm pressure on the tool.
Holes in wood can be made with the same twist
drills used for metal. These bits may overheat
unless pulled out frequently to clear chips from the
flutes. Work that is apt to splinter should be backed
up with a block of wood.
Keyless Chuck – 332502 (fi g. 4–6)
The 332502 feature a keyless chuck (d) for greater
convenience. To insert a drill bit or other accessory,
follow the steps listed below.
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