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.
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).
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
Machining on Vulcanized Fiber (Fish Paper) Rods covers ID/OD grinding or turning plus CNC knurling, threading, slotting and cutting to drawing. Feature depth, edge distance and remaining wall are reviewed pre-quotation, and we confirm capability against your drawing instead of 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.
ECR Epoxy Fiberglass Rods
Related insulation component from the WELLELE catalog.
Vulcanized Fiber Washers
Related insulation component from the WELLELE catalog.
Common questions
How is Vulcanized Fiber (Fish Paper) Rods specified?
We specify Vulcanized Fiber (Fish Paper) Rods from the assembly duty rather than a datasheet number. Send the voltage, the working temperature and the mechanical load, and we confirm the grade.
Which material is Vulcanized Fiber (Fish Paper) Rods manufactured from?
The material is Vulcanized fiber (fish paper). Alternate grades can be quoted against your drawing.
Is a material certificate of analysis provided for Vulcanized Fiber (Fish Paper) Rods?
Each batch of Vulcanized Fiber (Fish Paper) Rods is traceable through its material certificate of analysis. First-article reports and dielectric testing are performed to your named method.
Can Vulcanized Fiber (Fish Paper) Rods be produced to a customer drawing?
Diameter and length of Vulcanized Fiber (Fish Paper) Rods come from your drawing, and pricing is quoted against the drawing and the planned run quantity.
Engineering Guides & Selection Notes
Engineering notes covering the sizing and specification questions around Vulcanized Fiber (Fish Paper) Rods.
Get pricing for Vulcanized Fiber (Fish Paper) Rods
For Vulcanized Fiber (Fish Paper) Rods, attach the drawing plus the annual volume. Material, tolerance, ID, OD, wall and features all get checked against it before we quote, and the manufacturability notes for Vulcanized Fiber (Fish Paper) Rods come with the price.