Dust/Chip Extraction; Starting Operation; Maintenance And Service; Maintenance And Cleaning - Berner BCDH-11 Manual Original

OBJ_BUCH-711-003.book Page 13 Thursday, July 23, 2015 4:30 PM

Dust/Chip Extraction

 Dust from materials such as lead-containing
coatings, some wood types, minerals and metal
can be harmful to one's health. Touching or
breathing-in the dust can cause allergic reac-
tions and/or lead to respiratory infections of the
user or bystanders.
Certain dust, such as oak or beech dust, is con-
sidered carcinogenic, especially in connection
with wood-treatment additives (chromate, wood
preservative). Materials containing asbestos may
only be worked by specialists.
– Provide for good ventilation of the working
place.
– It is recommended to wear a P2 filter-class res-
pirator.
Observe the relevant regulations in your country
for the materials to be worked.
Operation

Starting Operation

 Observe correct mains voltage! The voltage of
the power source must agree with the voltage
specified on the nameplate of the machine.
Power tools marked with 230 V can also be op-
erated with 220 V.
Switching On and Off
To save energy, only switch the power tool on
when using it.
– To start the machine, push the On/Off switch 4
to the right.
– To switch off the machine, push the On/Off
switch 4 to the left.
For low temperatures, the machine reaches the full
impact rate only after a certain time.
This start-up time can be shortened by striking the
chisel in the machine against the floor one time.
Setting the Impact Rate
The electronic control enables stepless speed
preselection in accordance with the material to be
worked.
The constant electronic control keeps the prese-
lected impact rate nearly constant between no-load
and load conditions.
– Select the impact rate with the thumbwheel 5 ac-
cording to the material.
Changing the position of the chisel
The chisel can be locked in 12 positions. In this
manner, the optimum working position can be set
for each application.
– Insert the chisel into the tool holder.
1 609 92A 1DD • 23.7.15
– Push the chisel adjustment ring 3 forward and
turn the chisel to the required position with the
chisel adjustment ring 3.
– Release the chisel adjustment ring 3 and turn the
chisel until it latches.
Working Advice
 Before any work on the machine itself, pull the
mains plug.
Sharpening Chisels
Good results are only achieved with sharp chisels;
therefore, sharpen the chiselling tools in good
time. This ensures a long service life of the tools
and good working performance.
Re-sharpening
Sharpen chiselling tools using grinding wheels
(e. g. ceramic bonded corundum wheel) with a
steady supply of water. Reference values are
shown in the figure. Take care that no annealing
coloration appears on the cutting edges; this im-
pairs the hardness of the chiselling tools.
For forging, heat the chisel to between 850 and
1050 °C (bright red to yellow).
For hardening, heat the chisel to approx. 900 °C
and quench in oil. Then anneal in an oven for ap-
prox. one hour at 320 °C (annealing colour = light
blue).

Maintenance and Service

Maintenance and Cleaning

 Before any work on the machine itself, pull the
mains plug.
 For safe and proper working, always keep the
machine and ventilation slots clean.
 A damaged dust protection cap should be
changed immediately. We recommend having
this carried out by an after-sales service.
Service Indicator 6
When the carbon brushes are worn out, the ma-
chine switches itself off. This is indicated approx. 8
hours beforehand by the lighting or blinking of the
service indicator 6. The machine must then be sent
to an after-sales service agent.
If the machine should fail despite the care taken in
manufacturing and testing procedures, repair
should be carried out by an after-sales service cen-
tre for Berner power tools.
In all correspondence and spare parts orders,
please always include the 6-digit order number giv-
en on the nameplate of the machine.
English | 13