Canvas Epoxy (Phenolic Cotton) Fuse Tubes
Phenolic cotton canvas tubes for cost-effective mechanical fuse bodies. Canvas epoxy (phenolic cotton) tubes are the mechanical, lower-cost option for fuse bodies that are not arc-facing. They machine well and hold threads and shoulders. We supply them wound and machined to ID/OD/length, with faces and shoulders finished for the assembly. Generally no. Use it where it is not arc-facing; specify fi
Phenolic cotton canvas tubes for cost-effective mechanical fuse bodies. Canvas epoxy (phenolic cotton) tubes are the mechanical, lower-cost option for fuse bodies that are not arc-facing. They machine well and hold threads and shoulders. We supply them wound and machined to ID/OD/length, with faces and shoulders finished for the assembly. Generally no. Use it where it is not arc-facing; specify fi
Technical specifications
| Material | Phenolic cotton canvas laminate |
| Properties | Good mechanical, machinable |
| Use | Non-arc-facing bodies and forms |
| 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).
Information required for quotation
| Base tube | Approved material grade, ID, OD, wall and conditioning as per drawing |
| Datums | Drawing datum scheme and measurement reference |
| Key dimensions | Feature positions, depths, pitch and diameters reviewed before quotation |
| Thread / profile | Standard or custom profile, class, depth, engagement and gage method |
| Other features | Holes, slots, steps, chamfers, cuts and marking |
| Acceptance | Tolerances, sampling, gages, FAI and inspection report |
| Order | Prototype and production quantity, packaging and delivery target |
Applications by industry
- LV power fuse bodies and rejection fuse barrels
- Knife-blade fuse carriers and holders
- Protective sleeve bodies for gG/gM fuse links
- Distribution fuse link barrels in panel boards
- Motor-starter and small transformer primary fuses
- Custom fuse body blanks machined to DIN / IEC 60269 contours
Why phenolic cotton canvas for this application
Phenolic cotton canvas (canvas epoxy) laminate is machined into rigid, non-arc-facing fuse barrels where dimensional stability and low cost matter more than full arc resistance. Cotton-canvas grade absorbs less shock than paper when struck, giving a sturdier feel in draw-out fuse carriers.
Not for the internal arc-facing wall of a high-breaking-capacity link; pair canvas with an outer arc-quenching bore. Soak/swell risk in humid service unless varnished.
Standards: IEC 60269 (fuse dimensions), UL 248 (fuse body), RoHS / REACH compliant.
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
Phenolic Kraft Paper Tubes
Related insulation component from the WELLELE catalog.
Phenolic Cotton Cloth Laminated Rod
Related insulation component from the WELLELE catalog.
Custom Vulcanized Fiber Tubes
Related insulation component from the WELLELE catalog.
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.
Canvas epoxy for arc-facing surfaces?
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 Canvas Epoxy (Phenolic Cotton) Fuse Tubes
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.