Putting Into Operation; Motor Electronics; Grinding And Cutting Discs; Maintenance And Service - Narex EBU 125-12 C Originalbetriebsanleitung

English

Putting into operation

Check whether the data on the rating plate match with the
real power supply voltage. The tool intended for 230 V~ may
be also connected to 220/240 V~. Check whether the plug
type corresponds to the socket type.
Switching on
Push the switch (1) forwards, thus switching the machine on.
If you depress the front switch button part (1), the switch will
be arrested in the ON position.
Switching off
By releasing the switch button (1), the switch will be returned
to the initial position and the machine will be switched off. If
the switch (1) is arrested in the ON position, then by moderate
depressing the rear switch button part (1), the switch will be
released and returned to the initial position, i.e. the machine
will be switched off.

Motor electronics

Starting current limitation
Electronically controlled continual running secures device ac-
celeration without back thrust. Due to starting current limita-
tion in the device, 16 A protection is suffi cient.
Switching off during back thrust
During sudden drop of revolutions, for example blocking in
dividing cut, the current input in motor stops. For re-starting,
the device must be first switched off and again switched on.
Protection against re‑starting
Prevent uncontrolled starting of the device after current sup-
ply cut off. For re-starting, the device must be fi rst switched off
and again switched on.
Revolutions pre‑setting (EBU 125‑14 CE)
Use the revolutions regulator (4) for smooth revolutions
pre-setting.
1 3 500 rpm
2 4 600 rpm
3 6 000 rpm
4 7 600 rpm
5 8 900 rpm
6 11 000 rpm
Required number of revolutions depends on applied grinding
wheel and worked material.
Constant electronics
Constant electronics maintains revolutions during operation
and idle run near the constant. Regular operating shift is
achieved.
Protection from overloading dependant on
temperature
The safety electronics switches to cooling regime when the
critical temperature is reached. Motor continues running at
approximately ½ revolutions, constant electronics is deacti-
vated.
After cooling to approximately 10–20 s, the device is fully op-
erational.
Heat protection for devices heated during operation, reacts
adequately sooner.

Grinding and cutting discs

Check that the label on the disc shows the permissible periph-
eral speed or permissible revolution speed.
If the permissible revolution speed is given on the disc, it must
not be lower than the highest no-load speed of the grinder.
22
Discs with a permissible peripheral speed of 80 m/s and higher
may be used.
Test new cutting discs by letting them run for about one min-
ute with no load.
Unbalanced or vibrating discs should not be used and should
be discarded.
Protect grinding discs from shock, impact and lubricants.
If the grinding and cutting wheels are worn down to the mark
on the wheel guard (see the arrow sign), they should be re-
placed with new ones. This maintains the optimum grinding
and cutting performance of the machine (peripheral speed of
the grinding and cutting wheels).

Maintenance and service

Attention! Risk of el. shock. Prior to start any oper‑
ation, pull the plug out of the socket!
Vent holes (2) of the motor guard may not be covered.
Cable replacement must be carried out by a specialized service
station authorized correspondingly.
After ca 200 hours of operation the following activities
and works have to be carried out:
Check of brush length. The brushes shorter than 5 mm have to
be replaced for new ones.
The grinder will be stopped automatically if the brushes are
worn. The grinder is sent to the service station for mainte-
nance.
Grease replacement in gearbox and bearings.
Attention! With respect to protection from el.
shock and preservation of the class of protection,
all maintenance and service operations request‑
ing jig saw case removal must be performed by the au‑
thorized service centre only!
The current list of authorized service centres can be found at
our website www.narex.cz, section "Service Centres".

Storage

Packed appliance may be stored in dry, unheated storage
place with temperature not lower than -5 °C.
Unpacked appliance should be stored only in dry storage
place with temperature not lower than +5 °C with exclusion of
all sudden temperature changes.

Environmental protection

Power tools, accessories and packaging should be sorted for
environmental-friendly recy.
Only for EU countries:
Do not dispose of power tools into household waste!
According to the European Directive 2002/96/EC on waste
electrical and electronic equipment and its incorporation into
national law, power tools that are no longer suitable for must
be separately collected and sent for recovery in an environ-
mental-friendly manner.

Warranty

Our equipment is under warranty for at least 12 months with
regard to material or production faults in accordance with
national legislation. In the EU countries, the warranty period
for exclusively private use is 24 months (an invoice or delivery
note is required as proof of purchase).
Damage resulting from, in particular, normal wear and tear,
overloading, improper handling, or caused by the user or oth-
er damage caused by not following the operating instructions,
or any fault acknowledged at the time of purchase, is not cov-
ered by the warranty.