Phenolic Cotton Cloth Laminated Sheet (3230)
General industrial phenolic plate for mechanical and electrical parts. The 3230-grade phenolic cotton sheet is a general industrial laminate for mechanical and light electrical parts. It machines and taps cleanly. We supply it cut and machined to the part drawing with flatness and hole position checked. General mechanical and light electrical parts where you need a machinable phenolic plate. Machi
General industrial phenolic plate for mechanical and electrical parts. The 3230-grade phenolic cotton sheet is a general industrial laminate for mechanical and light electrical parts. It machines and taps cleanly. We supply it cut and machined to the part drawing with flatness and hole position checked. General mechanical and light electrical parts where you need a machinable phenolic plate. Machi
Technical specifications
| Grade | 3230 phenolic cotton |
| Use | Mechanical / light electrical |
| Property | Machinable |
| Material | Phenolic cotton cloth laminate |
| Standard | ASTM D4909 (phenolic), UL 94 V-0 (material dependent). |
| Operating temperature | -40 °C to +120 °C |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
Applications by industry
- Wear-resistant insulating plates in machine tooling
- Gear and silent-chain blank stock (mechanical)
- Electrical-machine insulation plates and end-winding spacers
- Jig and fixture base plates needing hard surfaces
- Punch-press and brake-pad insulating plates
- Custom sheet cut to panel and gasket profiles
Why phenolic cotton cloth laminate (3230) for this application
Phenolic cotton sheet (3230) balances machining ease, impact toughness and insulation for flat parts that see both mechanical wear and electrical presence.
Confirm grade against moisture and tracking. Cotton grades absorb and swell — seal cut edges for dimensional parts.
Standards: ASTM D709, IEC 60893-3-4, UL 94 HB/V-0.
Feature and remaining-wall review
ID/OD turned to drawing; CNC milling for flats, shoulders and holes. Tool sharpness critical to avoid delamination. 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
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Related insulation component from the WELLELE catalog.
Bakelite Plate (Orange / Black)
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Phenolic Cotton Cloth Laminated Rod
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Common questions
What is the thermal rating of phenolic cotton?
E- or B-class (100–120 °C). Suitable for ambient-temperature insulation and mechanical components.
Can phenolic cotton be machined?
Yes. CNC turning, milling and drilling with sharp tools to avoid delamination. Tolerances to ±0.05 mm on ID/OD.
What standards apply?
ASTM D4909 (phenolic), UL 94 V-0 (material dependent). Material COA per batch.
What applications suit phenolic cotton?
Mechanical fuse bodies, forms, mandrels, threaded insulator parts and low-cost structural components.
3230 grade for what?
Mechanical fuse bodies, forms, mandrels, threaded insulator parts and low-cost structural components.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for Phenolic Cotton Cloth Laminated Sheet (3230)
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.