Overload Clutch - Berner BHD-4-32 Manual De Instrucciones

WARNING: To reduce the risk of serious personal
injury, ALWAYS hold securely in anticipation of
a sudden reaction.
Proper hand position requires one hand on the side handle
with the other hand on the main handle

Overload Clutch

If the drill bit becomes jammed or caught, the drive to the drill
spindle is interrupted by the overload clutch. Because of the
forces that occur as a result, always hold the machine securely
with both hands and take a firm stance.
Switching On and Off (Fig. A)
1. To run the tool, press the variable speed switch
pressure exerted on the variable speed switch determines
the tool speed.
2. To stop the tool, release the switch.
3. To lock the tool in the off position, move the forward/
reverse slider to the central position.
3
Hammerdrilling (Fig. A)
Drilling with a Solid Bit
1. Set the mode selector switch
position. Refer to Selecting the Operating Mode in
Assembly and Adjustments.
2. Insert the appropriate drill bit.
NOTE: For best results use high quality carbide-tipped bits.
3. Adjust the side handle
4. If necessary, set the drilling depth.
5. Mark the spot where the hole is to be drilled.
6. Place the drill bit on the spot and switch on the tool.
7. Always switch off the tool when work is finished and
before unplugging.
Drilling with a Core Bit (Fig. A, C)
1. Set the mode selector 4
Refer to Selecting the Operating Mode in Assembly
and Adjustments.
2. Adjust the side handle
3. Insert the appropriate core bit.
4. Assemble the centredrill into the core bit.
5. Place the centredrill on the spot and press the variable
speed switch 1 . Drill until the core penetrates into the
concrete approx. 1 cm.
6. Stop drilling and remove the centredrill. Place the core bit
back into the hole and continue drilling.
7. When drilling through a structure thicker than the depth of
the core bit, break away the round cylinder of concrete or
core inside the bit at regular intervals. To avoid unwanted
breaking away of concrete around the hole, first drill a hole
the diameter of the center drill completely through the
structure. Then drill the cored hole halfway from each side.
8. Always switch off the tool when work is finished and
before unplugging.
10
2 .
1
4 to the hammerdrilling
as required.
6
to the hammerdrilling position.
6 as required.
Rotary Drilling (Fig. C)
1. Set the mode selector switch
position. Refer to Selecting the Operating Mode in
,
6
Assembly and Adjustments.
2. Fit the chuck adapter/chuck assembly.
3. Proceed as described for hammerdrilling.
WARNING: Never use standard chucks in the
hammerdrilling mode.
Screwdriving (Fig. A, C)
1. Set the mode selector switch
position. Refer to Selecting the Operating Mode in
Assembly and Adjustments.
. The
2. Select the direction of rotation.
3. Insert the special SDS Plus screwdriving adaptor for use with
hexagonal screwdriver bits.
4. Insert the appropriate screwdriver bit. When driving slotted
head screws always use bits with a finder sleeve.
5. Gently press the variable speed switch
damage to the screw head. In reverse (LH) rotation the tool
speed is automatically reduced for easy screw removal.
6. When the screw is flush with the workpiece, release the
variable speed switch to prevent the screw head from
penetrating into the workpiece.
Chipping and Chiselling (Fig. A, C)
1. Set the mode selector switch
position. Refer to Selecting the Operating Mode in
Assembly and Adjustments.
2. Insert the appropriate chisel and rotate it by hand to lock it
into one of 12 positions.
3. Adjust the side handle
4. Switch on the tool and start working.
5. Always switch off the tool when work is finished and
before unplugging.
WARNING:
• Do not use this tool to mix or pump easily combustible
or explosive fluids (benzine, alcohol, etc.).
• Do not mix or stir flammable liquids labelled
accordingly.
MAINTENANCE
Your BERNER power tool has been designed to operate
over a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends upon proper tool
care and regular cleaning.
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. Be sure the
trigger switch is in the OFF position. An accidental start-up
can cause injury.
4 to the rotary drilling
to the rotary drilling
4
1 to prevent
to the hammering only
4
6 as required.