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Typical Industry Uses:

  • Oil & Gas Production and Support Machinery
  • Automotive
  • Electrical/Hybrid Vehicles
  • Industrial Motors
  • Farm and Heavy Machinery
  • Rail
  • Power Generation and Distribution
  • Metal Casting
  • Aviation/Aerospace/Defense
  • Mining
  • Petrochemical
  • Transformers

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We specialize in the manufacture of simple and complex Mica parts, and have a design and engineering team capable of supporting product development, change and fulfillment. Our production capabilities are further elevated by proprietary and internally developed equipment that push fabrication options beyond the scope of other fabricated mica parts manufacturers. Building our Mica Splitting products in-house at our Virginia Facility gives us a significant advantage in controlling the quality of the product, review process with the clients and then allows very low lead times.

Fully cured material commonly used to punch or fabricate commutator segment mica for DC motors as insulation to separate copper segments in the comm. It also can be used to fabricate washers and spacers. Produced to NEMA 3 standards. Sheet sizes up to 36” x 36” for Shellac and 29.5" x 41.3" for AV.  Shellac segment plate has a compression rating of 10,000 PSI. AV segment heater plate mica has a compression rating of 20,000 PSI. Average thickness tolerance is +/- .001" and Individual tolerance of +/- .002". Thickness range of .010” to .060” for Shellac and .020” to .060” for AV.

Other thickness available special order. 

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Please reference the table below for the part number, NEMA Grade, Temperature Class, and other technical specifications for each of our available built-up mica splittings segment plate products. 

Product # NEMA grade Temp Class Fahrenheit Temp Class Celcius Binder Type

Binder Content

(% of weight)

Thickness Range Standard Thickness Tolerances Short Interval Dielectric Strength (Volts/mil avg. Standard Sheet Size
262 3 265 130 Shellac 4-7% Milled mica from .015" to .0625 .002 avg. 650 to .032" 550 from .033 - .0625 36"x36"
266 1 265-310 130-155 Alkyd-Vinyl 4-7%  Milled Mica from .015" to .0625 .002 avg. 650 to .032" 550 from .033 - .0625 36"x36"
270 1 310 155 Epoxy 4-7%  Milled Mica from .015" to .0625 .002 avg. 650 to .032" 550 from .033 - .0625 36"x36"
300 4 265 130 Shellac 4-7%  Milled Mica from .015" to .0625 .002 avg. 650 to .032" 550 from .033 - .0625 36"x36"

 

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TypeDescriptionBondTemp ClassAvailable
NEMA 3Rigid Segment PlateShellacClass C 130° CSheets up to 36" x 36". Thickness .015" to .060"
NEMA 3Alkyd-VinylClass F 155° CSheets 29.5" x 41.3". Thickness .020" to .060"

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