Phenolic Kraft Paper Tubes for Fuse Liners and Forms
Resin-impregnated kraft paper tubes for liners, forms and low-cost fuse bodies. Phenolic kraft tubes are the economical body for many LV links and liners. The resin-impregnated paper gives dimensional stability and arc resistance at a lower cost than fiberglass systems. We supply them wound to ID/OD and length, with the wall and resin content set from your duty and volume. Kraft is cheaper and fin
Resin-impregnated kraft paper tubes for liners, forms and low-cost fuse bodies. Phenolic kraft tubes are the economical body for many LV links and liners. The resin-impregnated paper gives dimensional stability and arc resistance at a lower cost than fiberglass systems. We supply them wound to ID/OD and length, with the wall and resin content set from your duty and volume. Kraft is cheaper and fin
Technical specifications
| Material | Resin-impregnated kraft paper |
| Form | Helically or convolutely wound |
| Service | LV fuse liners and bodies |
| Cost | Lower than epoxy glass systems |
💾 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
- Fuse liner tubes and inner bore forms inside metal barrels
- LV fuse carrier insulating sleeves
- Transformer winding formers and core tubes
- Paper-base insulating tubes for panel and starter duty
- End-closure sleeves for low-cost fuse assemblies
- Insulating forms where cost dominates performance margin
Why phenolic kraft paper for this application
Phenolic paper is the economical liner and former where the arc is handled elsewhere and the part mainly isolates and stays dimensionally stable enough to seat a fuse element.
Not for arc-facing or high-CTI duty; moisture pick-up distorts the tube. Pair with a barrier sleeve where the bore sees heat.
Standards: IEC 60893, ASTM D709, UL 94 HB/V-0 (grade dependent).
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
Custom Vulcanized Fiber Tubes
Related insulation component from the WELLELE catalog.
Canvas Epoxy Fuse Tubes
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G5/G9 Melamine 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.
Phenolic kraft vs vulcanized fiber?
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 Phenolic Kraft Paper Tubes for Fuse Liners and Forms
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.