Berner BHD 5-1 Instrucciones De Manejo página 21

Hammering only:
for chiselling and demolition applications.
In this mode the tool can also be used as
a lever to free a jammed drill bit.
1. To select the operating mode, rotate the mode
selector switch (f) until it points to the symbol of the
required mode.
It may be neccessary to twist the tool holder (m)
slightly to allow the mode selector switch (f) to
pass the position.
2. Check that the mode selector switch (f) is locked in
place.
Indexing the Chisel Position (fi g. 5)
The chisel can be indexed and locked into 18 different
positions.
1. Rotate the mode selector switch (f) until it points
towards the position.
2. Rotate the chisel in the desired position.
3. Set the mode selector switch (f) to the "hammering
only" position.
4. Twist the chisel until it locks in position.
Setting the Electronic Speed and Impact
Control Dial (fi g. 1, 3)
Turn the dial (g) to the desired level. Turn the dial
upwards for higher speed and downwards for lower
speed. The required setting is a matter of experience.
E.g.:
– when chiselling or drilling in soft, brittle materials or
when minimum break-out is required, set the dial to
a low setting;
– when breaking or drilling in harder materials, set
the dial to a high setting.
Setting the Torque Control Switch (fi g. 3)
NOTICE: Always turn the tool off before
changing torque control settings or damage to
the tool may result.
Move the torque control lever (t) to setting 40 Nm or
80 Nm as needed for application.
Clutch Setting 40 Nm (u) is designed for most
drilling applications and is designed to easily
clutch out when the drill bit encounters re-bar
or other foreign substances.
Clutch Setting 80 Nm (v) is designed for
higher torque applications such as corebits
and deep hole drilling and is designed to
clutch out at a higher torque threshold.
NOTE: Allow the motor housing to rotate a little while
changing torque.
Each time the tool is plugged in, it will automatically
default to clutch setting 1 into clutch setting 40 Nm (u),
the most sensitive setting.
Depth Rod (fi g. 1) (only BHD 5-1)
TO ADJUST THE DEPTH ROD
1. Push in and hold the depth rod release button (n)
on the side handle.
2. Move the depth rod (o) so the distance between
the end of the rod and the end of the bit equals the
desired drilling depth.
3. Release the button to lock rod into position. When
drilling with the depth rod, stop when end of rod
reaches surface of material.
OPERATION
Instructions for Use
WARNING: Always observe the safety
instructions and applicable regulations.
WARNING: To reduce the risk of serious
personal injury, turn tool off and
disconnect tool from power source before
making any adjustments or removing/
installing attachments or accessories.
WARNING: Tool bits may be hot and gloves
should be worn when changing or removing
them to avoid personal injury.
WARNING:
• Be aware of the location of pipework and
wiring.
• Apply only a gentle pressure to the tool
(approx. 20 kg). Excessive force does
not speed up drilling but decreases tool
performance and may shorten tool life.
• Always hold the tool fi rmly with both
hands and ensure a secure stance.
Always operate the tool with the side
handle properly assembled.
NOTE: Operating temperature is (-7 to +40° C (19°
to 104° F). Using the tool outside of this temperature
range will decrease the life of the tool.
Proper Hand Position (fi g. 6)
WARNING: To reduce the risk of serious
personal injury, ALWAYS use proper hand
position as shown.
WARNING: To reduce the risk of serious
personal injury, ALWAYS hold securely in
anticipation of a sudden reaction.
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