Vulcanized Fiber (Fish Paper) Rods
Fish-paper rods for arc-facing and formed insulator parts. Vulcanized fiber rod is used where arc faces the part or where the rod must be formed and punched. We supply it cut and machined to drawing. It machines and punches cleanly; we check diameter and straightness for the assembly. Yes. Vulcanized fiber resists arc and machines cleanly for formed parts. Rolled and machined vulcanized fiber (fis
Fish-paper rods for arc-facing and formed insulator parts. Vulcanized fiber rod is used where arc faces the part or where the rod must be formed and punched. We supply it cut and machined to drawing. It machines and punches cleanly; we check diameter and straightness for the assembly. Yes. Vulcanized fiber resists arc and machines cleanly for formed parts. Rolled and machined vulcanized fiber (fis
Technical specifications
| Material | Vulcanized fiber (fish paper) |
| Property | Arc-resistant, machinable |
| Use | Arc-facing insulator parts |
| 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
- Insulating pushrods and strikers in switches and relays
- Fish-paper rod for motor and generator insulators
- Blow-out coil support rods in contactors
- Drill bushing and jig insulator stock
- Coffin-stick-class machining blanks for electrical assembly
- Rods threaded as fuse-link and switch operating parts
Why vulcanized fiber for this application
Vulcanized fibre rod turns, taps and drills like hard wood but insulates, which makes it the economical choice for switch operating rods and small insulators where ceramic would chip.
Confirm moisture conditioning for tolerance; not for arc-facing or high-CTI wet duty.
Standards: ASTM D2491, IEC 60672.
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
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ECR Epoxy Fiberglass Rods
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Vulcanized Fiber Washers
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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.
Fish paper rod for arc duty?
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 Vulcanized Fiber (Fish Paper) Rods
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.