FR4 and G10 are fiberglass reinforced epoxy laminate materials widely used in electrical insulation and industrial structural applications. Due to their excellent electrical insulation, mechanical strength, and dimensional stability, they are commonly CNC machined into custom insulation components for transformers, motors, generators, switchgear, and electronic equipment.
FR4 is a flame-retardant grade, while G10 is a non-flame-retardant grade. Both materials offer reliable performance in demanding electrical environments.
FR4/G10 materials combine high strength with excellent dielectric properties, making them ideal for precision insulation parts.
Main Advantages
• Excellent electrical insulation performance
• High mechanical strength
• Good heat resistance
• Low water absorption
• Stable dimensions during operation
• Suitable for CNC precision machining
It is precisely by virtue of these characteristics that FR4/G10 materials are capable of meeting the application requirements for insulation systems in transformers, motors, electronic equipment, and similar devices.
Custom FR4/G10 machining services can produce a wide range of insulation components, including:
• Insulation washers
• Insulation spacers
• Transformer insulation supports
• Motor insulation barriers
• Electrical insulation plates
• CNC engraved insulation panels
• Battery pack insulation parts
• Semiconductor insulation structures
• Switchgear insulation components
• Custom epoxy fiberglass structural parts
Precision machining ensures tight tolerances and consistent quality for industrial applications.
FR4 and G10 contain fiberglass, which requires specialized machining techniques and durable cutting tools.
• CNC milling
• CNC routing
• Drilling
• Thread tapping
• Precision cutting
• Waterjet cutting
• Chamfering
• Engraving and marking
Professional machining helps reduce edge damage and ensures clean, accurate finished components.
FR4/G10 insulation parts are widely used across many industries:
Transformer Industry
Used for insulation supports, clamping structures, barriers, and high-voltage insulation components.
Motor & Generator Industry
Applied in slot insulation structures, motor supports, and winding insulation systems.
New Energy Industry
Widely used in battery packs, energy storage systems, and EV electrical insulation structures.
Industrial Electrical Equipment
Used in switchgear, control cabinets, power distribution systems, and automation equipment.
Semiconductor Equipment
Suitable for insulation and structural applications requiring high precision and stability.
Many industrial projects require custom-designed insulation parts based on drawings or technical specifications.
A professional FR4/G10 machining supplier can provide:
• Custom CNC machining
• Drawing-based production
• Small batch & mass production
• Tight tolerance processing
• Material selection support
• Electrical insulation application solutions
Choosing suitable insulation materials and machining processes can improve equipment reliability and operational safety.
FR4/G10 machined parts play an important role in modern electrical insulation systems. Their combination of electrical performance, mechanical strength, and CNC machinability makes them an ideal choice for transformers, motors, switchgear, and industrial electrical equipment.
As demand for reliable insulation materials continues to grow, custom FR4/G10 machining solutions are becoming increasingly important for electrical manufacturers worldwide.
