Custom Vulcanized Fiber Tubes for Fuse Links and Switchgear

Name: Custom Vulcanized Fiber Tubes for Fuse Links and Switchgear
Brand: WELLELE

Rolled and machined vulcanized fiber (fish paper) fuse bodies, thin-wall and small-diameter, to your drawing. Vulcanized fiber is the long-standing choice for LV cylindrical fuse bodies: it machines cleanly, resists arc, and holds tight ID/OD on thin walls. We roll or machine the tube from your dimensioned drawing and verify wall and straightness before shipment.

WELLELE Custom Vulcanized Fiber Tubes - manufacturer, specifications and applications

Technical specifications

Material	Vulcanized fibre (fish paper)
Density	1.20 - 1.40 g/cm3
Service temperature	Class B, up to ~130 degC
Dielectric strength	10 - 15 kV/mm (through thickness)
Wall tolerance	+/-0.05 mm typical on thin wall
Moisture	Seal or wax-impregnate for humid duty

💾 Datasheets & Test Reports

Download the technical data sheet for this product (PDF).

VF Tube Test Report

Applications by industry

LV/MV fuse tube bodies and protective sleeves
Knife-switch and load-break insulating tubes
Arc-slide and dead-front switchgear covering tubes
Transformer bushing insulator sleeves
End-cap and ferrule base tube stock for fuse OEM
General electrical insulating tubing for panels

Why vulcanized fiber for this application

Vulcanized fibre is the workhorse rigid tube for non-arc-facing electrical insulation: it combines real dielectric strength with machinability and a materially lower price than ceramic or epoxy-glass in LV to lower-MV service.

p>Not for direct arc-facing walls or continuous temp above ~105 °C. Hydrophilic. Specify conditioning for tight tolerances and humid locations. specify conditioning for tight tolerances and humid locations.

Standards: ASTM D2491, IEC 60269, UL 94 V-0 (material dependent).

Wrong application risk: Vulcanized Fiber Tubes is a non-arc-facing mechanical body part, and the arc root has to land somewhere else in the assembly. State the duty for Vulcanized Fiber Tubes in terms of voltage class, arc exposure, continuous temperature and chemical environment, and the correct grade is confirmed during engineering review.

Feature and remaining-wall review

We machine Vulcanized Fiber Tubes to drawing: ID and OD ground or turned, CNC knurled, threaded, slotted and cut. Feature depth, edge distance and remaining wall get reviewed before the quote, and capability is confirmed on your print, not from a blanket tolerance.

For dimensional stability on Vulcanized Fiber Tubes, tell us the humidity and the temperature band. Conditioning is settled with the drawing, before production.

Inspection and traceability

We state the control plan with you. Batch traceability links raw material lot to finished part.

First-article inspection (FAI) per your plan
In-process dimensional checks at every station
Batch certificate of conformance (COA) supplied on request
Lot traceability to incoming material certificate
Dielectric strength and insulation resistance testing available on request

Related components

Vulcanized Fiber Washers

Related insulation component from the WELLELE catalog.

Knurled & Screwed Vulcanized Fiber Tubes

Related insulation component from the WELLELE catalog.

Vulcanized Fiber + Fiberglass Tubes

Related insulation component from the WELLELE catalog.

Common questions

How do I select the right grade of Custom Vulcanized Fiber Tubes for Fuse Links and Switchgear?

For Vulcanized Fiber Tubes the duty comes first, meaning the voltage, the temperature it will see and the mechanical load. Send all three and we match them to the grades listed in the table above.

What material is used for Custom Vulcanized Fiber Tubes for Fuse Links and Switchgear?

The material is Vulcanized fibre (fish paper). Alternate grades can be quoted against your drawing.

Is material certification supplied with Custom Vulcanized Fiber Tubes for Fuse Links and Switchgear?

Batch records for Vulcanized Fiber Tubes include the material certificate of analysis. First-article inspection and dielectric strength testing are optional add-ons set by your specification.

Can Custom Vulcanized Fiber Tubes for Fuse Links and Switchgear be made to our drawing?

Bore, wall and cut length on Vulcanized Fiber Tubes come from your drawing. Send the print with the quantity and the quote follows it.

Engineering Guides & Selection Notes

Technical articles that go deeper on selecting and specifying Vulcanized Fiber Tubes.

Get pricing for Custom Vulcanized Fiber Tubes for Fuse Links and Switchgear

The quote for Vulcanized Fiber Tubes starts from your drawing and the annual volume. We verify the material against the duty and tolerance, confirm ID, OD, wall and every feature of Vulcanized Fiber Tubes, and reply with manufacturing notes and pricing.