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Collector Gaskets

Due to its proximity to the primary aluminum industry for over 30 years, Von Roll has developed the right product range to meet all standards and custom technical protection requirements. Altherm 660 is a composite material made especially for gaskets.

Von Roll manufacture collector rings for commutators in electrical machines e.g. traction motors.
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Mica Tubes

Von Roll is able to supply an extensive range of top-quality tubes made from Samica papers, which are impregnated with appropriate resin systems in order to meet the characteristics requested for the specific applications.

The mica tubes can be supplied varnished or unvarnished. We deliver mica cylinders in a very wide range of diameters and lengths, in standard sizes or tailored to customer specifications.
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Pressed Mica Sheets

Mica is a mineral raw material with outstanding dielectric, thermal and physical properties. Von Roll developed the technique of converting mica scraps from the mine into mica paper registered under the trade name Samica based either on muscovite or phlogopite.

Samica is then impregnated with an appropriate bonding resin and heat-pressed to be consolidated into Samicanite laminates. The various types of paper and the different resins and fillers enable Von Roll to achieve the particular properties of mica paper laminates, which are characterized by excellent, electrical, mechanical and thermal properties. Typical applications include electrical engineering, induction ovens, the automotive industry and the household applications industries such as microwave ovens, hair dryer etc.
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Conductive Varnishes

Electrical stress control measures are an essential component of any high-voltage machine. Von Roll has developed conductive and semi-conductive varnishes under the trade names CoronaShield P.

These varnishes can be applied as:

External corona protection - within the slot
End corona protection - outside the slot
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Mica Mastic

Mica mastic is used as a filler in conductor strands of Roebel bars at the points where conductors cross over. The material contains mainly mica powder and epoxy resin.
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Conductor Insulation Tapes

Samicafilm products are based on Von Roll Samica mica paper impregnated, reinforced with one or two polyester or polyimide film backings and with or without adhesive coating (hot-melt).

Samicafilm tape covering on bare or enameled wires is the preferred conductor insulation for stator and rotor coils due to its substantial advantages:

Better corona resistance
Reduced insulation thickness
Softer copper, enabling easier workability
Greater manufacturing flexibility
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Collector Ring

Due to its proximity to the primary aluminum industry for over 30 years, Von Roll has developed the right product range to meet all standards and custom technical protection requirements. Altherm 660 is a composite material made especially for gaskets.

Von Roll manufacture collector rings for commutators in electrical machines e.g. traction motors.
View Complete Details

Semi-conductive Varnishes

Electrical stress control measures are an essential component of any high-voltage machine. Von Roll has developed conductive and semi-conductive varnishes under the trade names CoronaShield P.

These varnishes can be applied as:

External corona protection - within the slot
End corona protection - outside the slot
View Complete Details
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  • (Von Roll USA, Inc.)
  • Schenectady, NY 12306 map, United States
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