SUHNER USC 25-R Documentación Técnica página 4

8 On/Off switch
9 Variable speed selector
Suitable Tools
General: If possible always mount shank in collet until it
bottoms out.
USC 25-R
10 Burs, specialty abrasives,
materials conditioning products
11 Mounted points, Attention: always observe mounting
instructions.
USC 9-R
12 Non-woven Nylon Abrasives, deburring, cleaning and
finishing tools.
Additional Abrasives and Tools can be found in the the
catalogs.
Safety Instructions
• Do not exceed max. operating speed of tool and clam-
ping element.
• Observe accurate mounting of tools.
• Secure work, use clamps or vise to hold work.
• The grinder operator shall wear safety goggles or face
shield at all times when the grinder is in operation.
• If noise level exceeds 85 dB(A) at the work station,
sound insulation and hearing protection measures
must be taken by the operator.
• For additional personal protection, it is advisable to
connect tool to a ground fault circuit interrupter,(only in
damp areas).
For additional safety instructions refer to enclosed bro-
chure EW 39 210 01.
Before Start-up
Voltage Warning
Before connecting tool to a power source, be sure the
voltage supplied is the same as specified on the name
plate of the tool. The power supply should not vary more
than 10% above or below the voltage indicated on the
nameplate.
On-off switch
Before connecting power cord to receptacle, make sure
that switch 8 is in the Off -0- Position.
Operation conditions and instructions
This tool is equipped with an electronic variable speed
tachometer selector and an overload cut-out switch, which
operates as follows:
1. Soft start
2. With increased work pressure more current is drawn ,
which virtually holds speed at a constant rpm.
3. If the motor is overloaded, the electronic cuts off the
power. In this event switch at once to OFF position,
4
restart right away to assure cooling effect in no load
mode. Repeated automatic cut off indicates, tool is
being overloaded.
Attention: Even if the cut-out is not activated, danger of
overloading always exists, thus don't force the tool in or-
der not to increase unnecessarily excessive current draw,
which overheads the motor.
Speed selection
Select required speed with variable speed selector 9 for
correct surface feet./M.O.S.
Speed selector USC 9-R USC 25-R
Position rpm
1 4 000
2 5 000
3 6 000
4 7 000
5 8 000
6 9 000
Attention: Do not change pre-selected speed while tool is
running and has working tools mounted.
Do not treat any material containing asbestos.
Disconnect Tools
When changing accessories and abrasives, burs, brushes
etc.
• Hold spindle 3 with wrench 7, release or tighten clam-
ping nut 5 with wrench 6. Clean collet and collet holder
before installation.
• Check concentricity, use only vibration free tools and
always observe M.O.S. (Max. operating speed).
Maintenance
• Store tool in a clean, dry place.
• Disconnect tool when not in use and before servicing.
• The ventilator openings for cool air must be kept free
and clean, use air gun to blow out dirt.
• Replace grease in USC 9-R grinder every other time,
when carbon brushes are replaced. Use the
authorized service center nearest you .
• Damaged plugs and cords must be replaced immedia-
tely.
• Repairs must only be done by a qualified/licensed elec-
trician, otherwise it could be hazardous to the operator.
• Warranty claims can only be considered, if tool is retur-
ned complete.
Accessories:
All accessories can be found in the
Power Tool catalog.
Subject to change!
rpm
11 000
13 000
16 000
19 000
22 000
25 000
Abrasive