G10/FR4 Machining

At Mayfly Manufacturing we specialize in machining G10/FR4 thermoset composites. G10 is a continuous woven glass fabric laminated with an epoxy resin under high pressure. It is stable over temperatures with low water absorption and high strength-to-weight ratio. It has great electrical insulation properties making it useful for electronic integrations. FR-4 is a flame-retardant grade of G10.  

Mayfly Mfg can machine parts either wet (with coolant) or dry. Medical G10 parts are typically machined dry to avoid contamination. When running dry a HEPA filtered dust collector is used to mitigate dust and airborne glass particulates. Most machine shops tend to stay away from this material because of the dust mitigation and wear it has on the machines.


Examples of uses for G10 Include:

  • Electrical Insulators and Housings
  • Arc Barriers
  • Downhole Oil and Gas Components
  • Insulative Jigs and Fixtures
  • Printed Circuit Boards (PCB)
  • Medical Equipment
  • Rocket Cases
  • Knife and Firearm Handles


G10 SheetG10 RodG10 PartsG10 Part