Small-Diameter, Thin-Wall Fuse Tubes with Tight Tolerances
Thin-wall vulcanized fiber and epoxy tubes for compact cylindrical links. Compact links need thin walls and small diameters held to tight ID/OD. We roll and finish these sections and check wall concentricity so the element seats correctly. Tell us the smallest ID, the wall and the tolerance; we will confirm whether rolling or machining gives the better result for your volume. It depends on diamete
Thin-wall vulcanized fiber and epoxy tubes for compact cylindrical links. Compact links need thin walls and small diameters held to tight ID/OD. We roll and finish these sections and check wall concentricity so the element seats correctly. Tell us the smallest ID, the wall and the tolerance; we will confirm whether rolling or machining gives the better result for your volume. It depends on diamete
Technical specifications
| ID range | Small-diameter, per drawing |
| Wall | Thin-wall, +/-0.05 mm typical |
| Material | Vulcanized fiber / thin epoxy glass |
| Check | Wall concentricity and straightness |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Applications by industry
- Small-diameter fuse link bodies for instrument and control circuits
- Thin-wall barrels for low-current HRC and gG links
- Precision fuse bodies for OEM aftermarket assemblies
- Glass-tube replacement barrels run to tight OD tolerance
- Wire-in-tube protection sleeves in test equipment
- Custom link bodies machined with precision end-cap shoulders
Why vulcanized fiber for this application
Small bores with thin walls call for a material that cuts clean without delaminating at the edge. Vulcanized fibre machines on standard lathes to a repeatable thin wall, which is why it is the default for compact, low-current link bodies.
Dimensional tolerance tightens as wall thins; stock must be moisture-conditioned or bores grow in humid climates. Confirm torque limits on press-fit end caps.
Standards: ASTM D2491 (vulcanized fiber), IEC 60269, UL 248.
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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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.
How thin a wall can you hold?
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 Small-Diameter, Thin-Wall Fuse Tubes with Tight Tolerances
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.