Dremel 7700 Instrucciones De Funcionamiento página 21

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Wire Brushes
Three different shapes of wire brushes are available.
For best results wire brushes should be used at
speeds not greater than 15,000 RPM. Refer to
Operating Speeds section for proper tool speed set-
ting. The three shapes come in three different materi-
als: stainless steel, brass and carbon wire. The stain-
less steel perform well on pewter, aluminum, stain-
less steel, and other metals, without leaving "after-
rust". Brass brushes are non sparking, and softer than
steel; making them good for use on soft metal like
gold, cooper and brass. The carbon wire brushes are
good for general purpose cleaning.
Bristle Brushes
These are excellent cleaning tools on silverware, jew -
elry and antiques. The three shapes make it possible
to get into tight corners and other difficult places.
Bristle brushes can be used with polishing compound
for faster cleaning or polishing.
Brushing Pressure
1. Remember, the tips of a wire brush do the work.
Operate the brush with the lightest pressure so
only the tips of the wire come in contact with the
work.
2. If heavier pressures are used, the wires will be
overstressed, resulting in a wiping action; and if
this is continued, the life of the brush will be short-
ened due to wire fatigue.
3. Apply the brush to the work in such a way that as
much of the brush face as possible is in full contact
with the work. Applying the side or edge of the
brush to the work will result in wire breakage and
shortened brush life.
INCORRECT:
Excessive pressure can cause wire breakage.
CORRECT: Wire tips doing the work.
15°
Polishing Accessories
These include an impregnated polishing point and an
impregnated polishing wheel for bringing metal sur -
faces to smooth finish; a felt polishing tip and felt
polish ing wheel, and cloth polishing wheel, all used
for polishing plastics, metals, jewelry and small parts.
Also included in this group is a polishing compound
(No. 421) for use with the felt and cloth polishers.
Polishing points make a very smooth surface, but a
high luster is obtained using felt or cloth wheels and
polishing compound. For best results polishing
accessories should be used at speeds not greater
than 15,000 RPM.
No polishing compound is needed when using the
425 Polishing Wheel.
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