Glass vacuum-tube envelope, 30mm OD to 7mm OD exhaust.
Fuse against a matching stem
(tube and
slot shapes
are available) to produce a complete vacuum tube ready for
vacuum processing.
Our envelopes are inspected individually. We guarantee reliable,
stress-free fusing against our other soda-lime glass items.
- Material: Soda-Lime Glass (Schott AR-Glas®; Hydrolitic Class 3)
- Envelope Outside Diameter: 30mm ±.29 (1.181" ±.11)
- Envelope Wall Thickness: 1.5mm ±.06 (.059" ±.002)
- Envelope Length: 8cm (3.14")
- Exhaust Tube Outside Diameter: 7mm (.276")
- Exhaust Tube Wall Thickness: .9mm (.035")
- Exhaust Tube Length: 9cm (3.5")
- End Execution: Fire-Polished
- Max. Straightness Error: ±1mm in 10cm (±.04" in 3.94")
® AR-Glas is a registered trademark of Schott AG.