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Helwig Carbon Products, Inc. is one of the last American owned
manufacturers of carbon brushes, brushholders, constant force spring assemblies,
mechanical carbons, quick disconnect terminals and mounts, sliding contacts. Our
carbon brushes and holders are used on large industrial motors; both commutator
and slipring, fractional horsepower motors, tachometers, synchronous motors, and
permanent magnetic motors. We serve a wide range of industries including power
generation, steel, paper, motor repair, elevator, railroad, transit, and
OEM.
It takes three things to have a great carbon brush: the right carbon
composition (grade) for the application, quality manufacture for precise fit and
finally, something "extra". Helwig"s got them all. They have been in the carbon
brush business since 1928 and have recently also bought the rights to the Speer
name in the U.S. market, including all the Speer grades. They are an ISO9001
certified manufacturer. And finally, the extras: the most important is the Red
Top, a patented design with a - can you guess it? - red cushion mounted on the
top end of the brush where it touches the brush holder spring. This produces
better contact with the commutator surface (eliminates brush bounce) and also
stops stray currents from flowing back into the brush holder spring and damaging
it.
Another Helwig innovation is quick disconnect terminals which eliminate
the need to use screwdrivers to electrically connect the brush into the circuit.
There are no screws to lose into the motor.
Helwig also has:
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Red Top multiflex and triflex brushes where two or three brush segments
are sandwiched together, each glued to the slightly flexible red top - giving
the advantage of multiple brush operation in one brush.
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Red Top bias brushes - cut diagonally and sandwiched together for
difficult commutating situations and high-speed rotation.
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Red Top Transert brushes with inserts to improve brush life under
difficult filming situations: graphite inserts to reduce friction, metal inserts
to improve cleaning action in severely contaminated situations.
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