Fiber-Epoxy Combination Tubes for Hybrid Fuse Bodies
Layered vulcanized fiber and epoxy glass for combined arc and strength. Some links need the arc behavior of fiber on the inside and the strength of epoxy glass on the outside. We build combination tubes that layer these materials in one body. The layup is set from the clearing duty and the mechanical load. We review the drawing and propose the layer stack before production. Yes. We build layered c
Layered vulcanized fiber and epoxy glass for combined arc and strength. Some links need the arc behavior of fiber on the inside and the strength of epoxy glass on the outside. We build combination tubes that layer these materials in one body. The layup is set from the clearing duty and the mechanical load. We review the drawing and propose the layer stack before production. Yes. We build layered c
Technical specifications
| Material | Vulcanized fiber + epoxy glass layers |
| Purpose | Combined arc + mechanical duty |
| Form | Laminated / combination tube |
| Standard | ASTM D2491 (vulcanized fiber), IEC 60269 (fuse dimensions), UL 94 V-0 (flammability, material dependent). |
| Operating temperature | -40 °C to +105 °C |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Applications by industry
- Hybrid fuse bodies: fibre outer barrel, epoxy bore liner
- Fuse links needing arc bore plus mechanical strong outer wall
- Switchgear bushing structures with mixed duty layers
- Transformer protection fuse assemblies
- Drop-out fuse bodies combining arc and strength zones
- Custom link bodies with machined external profiles
Why vulcanized fiber + epoxy glass for this application
Layering vulcanized fibre and epoxy glass lets one part carry both jobs: the epoxy liner faces the arc, the fibre shell adds toughness and saves weight/cost. Setting the two sleeves is a controlled assembly step, not two parts bolted on.
Layer bond and moisture barrier at the seam must be validated; a wicking interface undermines both. Confirm which grade sits on which face for your duty.
Standards: ASTM D2491 + ASTM D709, IEC 60269, UL 94 V-0.
Feature and remaining-wall review
ID/OD ground or turned; CNC knurling, threading, slotting and cutting to drawing. Feature depth and remaining wall reviewed pre-quotation. Review feature depth, edge distance and remaining wall against critical geometries. Capability is confirmed on your drawing, not from a blanket tolerance.
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 + Fiberglass Tubes
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Ceramic-Filled Epoxy Fiberglass Tubes
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Custom Vulcanized Fiber Tubes
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Common questions
What is the standard for vulcanized fiber tubes used in fuse assemblies?
Vulcanized fiber tubes for fuse bodies are referenced to IEC 60269 for body dimensions and end-cap geometry. Material follows ASTM D2491 (fish paper) and UL 94 V-0 for flammability. Specify the fuse link type and voltage class and we confirm the grade and tolerance.
What tolerance can you hold on vulcanized fiber tubes?
On thin-wall vulcanized fiber sections we typically hold ±0.05 mm on ID and OD. Knurl pitch, major/minor diameter and position are reviewed per drawing. Capability is confirmed against your print, not published as a blanket claim.
Is vulcanized fiber suitable for arc-facing fuse applications?
No. For arc-facing surfaces, use ceramic-filled epoxy glass, melamine or synthetic arc-quenching composites. Vulcanized fiber is for non-arc-facing mechanical bodies and end caps.
Can you supply COA and batch traceability?
Every batch is traceable to the incoming material certificate. Material COA, first-article inspection (FAI), in-process checks and final inspection reports are supplied per your plan on request.
Can you combine fiber and glass in one tube?
Every batch is traceable to the incoming material certificate. Material COA, first-article inspection (FAI), in-process checks and final inspection reports are supplied per your plan on request.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for Fiber-Epoxy Combination Tubes for Hybrid Fuse Bodies
Attach the drawing with annual volume. We check the material against your duty and tolerance, verify ID / OD / wall / features, and respond with manufacturability notes and pricing.