Precision Glass, Inc.

Hermetic Seal Glass

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  • Draw Process
    • Redraw process is a very economical way to produce beads when raw material is available as tubing.
    • Melt process is used for glasses which are only available only in billet or strip form.
  • Glass Types
    • Corning
      • 7740
      • 7052
    • Kimble
      • EN-1
      • KG-33
    • Schott
      • 8250
      • 8340
      • 8347
      • 8350
      • Duran
      • AR
      • NBk-7
      • S-8060 (TA-23)
      • S-8072 (Cabal-12)
    • NEG
      • SRI
    • Heraus
      • Quartz
  • End Condition
    • Saw – standard
    • Grind – when fine finish is required
    • Grind and Polish
    • Fire Polish – eliminate particulate shedding from the sawed end, and smooths the edges.
  • Hermetic Seal Glass Size Capability
    • Generally outside diameters (OD) up to 0.250″ are available.  Inside diameters (ID) from microscopic up to 80% of the Od are standard, thinner walls require special processing.
    • Sawed/Ground/Polished/fire polished lengths up to 5″ are standard.  Longer lengths possible with scribe and break ends.
  • Tolerance Capability
    • Inside and Outside diameter bilateral tolerances of ± 2% is standard, 1% special (within measuring capability).
    • Centerless Ground OD ± 0.0002 is available.
    • Length bilateral tolerances of ± 0.003″ to 0.001″ is availble depending on size.
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