High-Precision Epoxy Fiberglass Machining (G10 / G11)

We provide professional G10 and G11 machining services for high-performance insulating components, specifically transformer spacers, electrical supports, and custom CNC parts.

G10 and G11 are epoxy fiberglass laminates widely used in electrical and industrial applications due to their excellent mechanical strength and insulating properties. According to international standards, they are classified as follows:

• G10 = EPGC201
• G11 = EPGC203

Standard: IEC 60893 / EN 60893

G10 vs. G11: Key Differences
Although G10 and G11 have the same basic material structure, G11 has superior performance under extreme conditions.

🔹 Thermal resistance
G11: Glass transition temperature ≈ 175°C
G10: Approximately 130°C
👉 G11 maintains good mechanical strength even at high temperatures.

🔹 Moisture resistance
G11: Extremely low water absorption (~0.09%)
G10: Higher than G11
👉 G11 performs more reliably in humid or oily environments.

🔹 Electrical insulation
Both typically meet the UL94 V-0 flame retardant rating.
G11 exhibits better insulation stability under humid conditions.

Application of G10 and G11 machining parts
🔹 G10 App
Suitable for standard environments:

Transformer gaskets
Insulating components of switchgear
Motor insulation components
Electrical structural components

🔹G11 Applications

Designed for harsh environments:

High-voltage switchgear
Oil-immersed transformers
Explosion-proof electrical equipment
High-humidity or high-temperature conditions

Custom G10/G11 Machining Services

We provide comprehensive CNC machining solutions for epoxy fiberglass materials:

CNC cutting and milling
Precision drilling
Milling and shaping
Custom insulation component manufacturing

👉 High precision and consistency for industrial applications

Material Selection Guide
Select G10
✔ Economical and affordable
✔ Suitable for dry and standard environments
Select G11
✔ High temperature resistant
✔ Excellent performance in humid, oily, or high-pressure environments
✔ Lower long-term maintenance costs

Why choose our machining services?
Extensive experience in insulation material processing
Strict quality control, in compliance with IEC/EN standards
Customized solutions based on drawings or samples
Rapid response to international customers
Looking for reliable G10/G11 machining services for transformer gaskets or custom insulation parts?

👉 Contact us now for a quick quote and technical support.