Hermetic Seal Glass
- 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
- Kimble
- Schott
- 8250
- 8340
- 8347
- 8350
- Duran
- AR
- NBk-7
- S-8061
- S-8060 (TA-23)
- S-8072 (Cabal-12)
- NEG
- Heraus
- 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.
