SUHNER ABRASIVE USK 3-R Documentación Técnica página 22

Insert the clamping shaft of the grinding tool all the way
into the collet chuck. Tighten down tensioning nut.
The grinding tools must run true. Do not use grind-
ing tools which have gotten out of round. Trial run!
Check grinding tools before use. The grinding tool
must be correctly mounted and must rotate freely. Per-
form a trial run a minimum over a period of 30 seconds
without load. Do not used grinding tools which are dam-
aged, which do not run true or which vibrate!
3.4 w
orking instructions
To achieve an optimum grinding result, move grinding
tool uniformly back and forth with light pressure. The
electronic constant control maintains the speed nearly
constant during idling and work under load and assures
a uniform result. Excessive pressure lessens the working
capability of the machine, as well as the life of the grinding
tool. The machine is equipped with an electronic control
and integrated overload protection. If the machine is over-
loaded, the speed will drop drastically. Immediately take
the load off the machine and allow to run for a short time
without load.
4. S
ERvICE
4.1 P
reventive mAintenAnce
To work effectively and surely keep the
machine and the ventilation slots clean at
all times.
After approx. 150 operating hours check carbon brushes
and replace if necessary. Clean motor housing and re-
plenish grease filling in gearbox housing.
To maintain the protective insulation the machine must be
subjected to a technical safety inspection. This work must
be done exclusively by a specialized electrical workshop.
When working on metal under extreme working conditions
conductive dust deposits can occur inside the machine,
thereby impairing the protective insulation of the tool. In
such cases the use of a stationary vacuuming system,
frequent blowing out of the ventilation slots and protection
by a fault current protection switch are advised.
22
/ m
aINTENaNCE
4.1.1 c
hAnging the cArbon brushes
The Automatic-Stop feature protects the machine from
defects due to excessively consumed carbon brushes
(230V).
The machine is equipped with two carbon brushes, i.e.
one is installed in each handle half. The carbon brushes
must be changed as follows:
Unscrew four screws and remove the handle halves.
Lift spring with screwdriver and remove brush. Install new
brushes. Clean carbon brush holders, making absolutely
sure not to change the carbon brush arrangement of the
carbon brush assembly. Fit handle halves and fasten with
four screws.
Repeat this change on the opposite side, making
absolutely sure to avoid both handle halves from
being opened at the same time.
4.2 s
PAre PArts
See page 2.3.
4.3 r
ePAir
If despite strict observance of the manufacturing and test-
ing method the tool should happen to fail, it must be re-
paired by an authorized SUHNER agency.
Any replacement needed for the connecting line must be
installed by the manufacturer or its agent if safety risks are
to be eliminated.
4.4 w
ArrAnty
In the event of the tool being improperly handled, used