G10 & FR-4.
Glass-epoxy laminate.
PCB substrate.
G10 and FR-4 — glass-fiber epoxy laminate. PCB substrate, electrical insulation, structural composites. Standard for printed circuit boards. CNC machinable.
Key principles.
Glass + epoxy
Woven glass cloth + epoxy resin. Layers laminated under pressure.
Flame retardancy
G10 standard. FR-4 flame-retardant (UL94 V-0). FR-4 preferred for electronics.
UTS 350 MPa
High strength + electrical insulation. Better than typical plastic.
Insulator
Dielectric strength 30 kV/mm. Standard PCB insulator.
Glass-fiber abrasive
Cuts hard tool wear. Sharp tools, slow speeds, dust extraction.
Mid-priced
~$10-20/kg sheet stock. Premium over commodity plastics.
FAQ
G10 vs FR-4 differences?
FR-4 has flame-retardant additives (bromine). UL94 V-0. Used for PCBs. G10 mechanical similar but flammable.
Machining tips?
Carbide tools (glass dulls steel quickly). Slow speeds, light depths. Dust extraction (silica).
Major applications?
PCB substrates (FR-4 dominant). Electrical insulator (G10/FR-4). Composite structural parts.
Drilling holes?
Diamond-coated drills last longer than carbide. Slow speeds. Peck drilling for deep holes.
Cosmetic considerations?
Natural color light tan/green. Limited surface finish options. Painted or laminated for cosmetic.
Health hazards?
Glass fiber dust harmful — wear respiratory protection. Standard PPE for machining.