Fein KBM 50 Q, Manual, Page: 33 / 233

33
en
Always operate the power tool with together with a
PRCD personal protection switch (***).
Before beginning to work, always check the proper
functioning of the PRCD personal protection switch
(***) (see page 33).
Hand/arm vibrations
The vibration emission level given in this information
sheet has been measured in accordance with a stand-
ardised test given in EN 62841 and may be used to
compare one tool with another. It may be used for a
preliminary assessment of exposure.
The declared vibration emission level represents the
main applications of the tool. However, if the tool is
used for different applications, with different accesso-
ries or poorly maintained, the vibration emission may
differ. This may significantly increase the exposure level
over the total working period.
An estimation of the level of exposure to vibration
should also take into account the times when the tool
is switched off or when it is running but not actually
doing the job. This may significantly reduce the expo-
sure level over the total working period.
Identify additional safety measures to protect the oper-
ator from the effects of vibration such as: maintain the
tool and the accessories, keep the hands warm, organi-
sation of work patterns.
Operating Instructions.
Only use water-soluble cutting fluids (oil in water) as
the cooling agent.
Observe the manufacturer’s instructions on coolant.
Pay attention that the set-up surface for the magnetic
foot is flat, clean, rust-free and ice-free. Remove var-
nish, putty/filler layers and other materials. Prevent an
air gap between the magnetic foot and the set-up sur-
face. The air gap reduces the magnetic holding power.
Do not operate this machine on hot surfaces; it could
lead to a permanent reduction of the magnetic holding
power.
When working, always use the magnetic foot; pay
attention that the magnetic holding power is sufficient:
– When the green button on the control panel lights
up permanently, the magnetic holding power is suf-
ficient and the machine can be operated with
man-
ual or automatic feed .
– When the Magnet button on the control panel
flashes, the magnetic holding power possibly is
insufficient and the machine must be operated
man-
ually with reduced feed . In this case, the KBM 50
auto cannot be operated in automatic mode.
When working non-magnetic materials, suitable FEIN
fastening devices, such as vacuum plates or pipe drilling
devices, which are available as accessories, must be
used. Observe the corresponding operating instruc-
tions for these.
When working on steel materials with a material thick-
ness of less than 12 mm, the workpiece must be rein-
forced with an additional steel plate in order to
guarantee the magnetic holding power.
The magnetic foot is monitored by means of a power
sensor. If the magnetic foot is defective, the motor will
not start.
In case of overload, the motor automatically stops and
must be restarted again.
Work only with the absolutely required amount of
feed. Excessive feed can lead to breakage of the appli-
cation tool and loss of the magnetic holding power.
When the power supply is disconnected while the
motor is running, a protective circuit prevents auto-
matic restarting of the motor. Restart the motor again.
Adjust the gear setting only when the machine is at a
complete stop or when the motor is running down.
The last set speed is automatically stored (
memory func-
tion ). To start the power tool with the last set speed,
press and hold the button with the symbol, and
then press the button with the symbol.
Do not stop the drill motor during the drilling proce-
dure.
Only remove the core bit from the drilled hole while
the motor is running.
If the core bit should remain stuck in the material, stop
the drill motor and carefully turn the core bit out coun-
ter-clockwise.
Remove the chips and the drilled core after each drilling
process.
Do not touch the chips with your bare hands.
Always use a chip hook (6 42 01 001 00 0).
Danger of burning! The surface of the magnet can
reach high temperatures. Do not touch the mag-
net with your bare hands.
When changing a drill bit, pay attention not to damage
the cutting edges.
When core drilling layered material, remove the core
and the chippings after drilling each layer.
Do not use the magnetic core drill unit when the cool-
ing-lubricant system is defective. Each time
before oper-
ating , check for tightness against leaks and for cracks in
the hoses. Prevent liquids from entering or penetrating
electrical components.
KBM 50 auto: Do not use the automatic feed when
drilling, countersinking, tapping and reaming.
The KBM 50 auto magnetic core drill unit is equipped
with core-bit break-through detection. Upon comple-
tion of the drilling procedure, the machine detects the
break-through, and the drill motor automatically
returns to the starting position. The drill motor does
not switch off until in the starting position.
PRCD personal protection switch (***) (see
page 9)
The PRCD personal protection switch is specifically for
your protection; therefore, do
not misuse it as on
On/Off switch.
If the PRCD personal protection switch is damaged, e.g.
due to contact with water, do not use it any more.
The PRCD personal protection switch is indispensable;
it is used for protection of the power tool operator
against electric shock. Under fault-free operation, the
control lamp of the PRCD personal protection switch
lights up red.
OBJ_BUCH-0000000352-001.book Page 33 Tuesday, June 11, 2019 2:19 PM