FR4 is widely used for making FR-4 epoxy glass cloth CNC machining, known for its electrical insulation, mechanical strength, and flame resistance. At MYT Machining, we specialize in CNC machining FR4 materials to deliver precision-engineered parts for industries like electronics, aerospace, and telecommunications.
Whether you need high-voltage FR4 machined components or custom FR-4 parts, we provide advanced CNC capabilities that meet strict tolerances and performance demands.
What Is FR4 and Why Use It for Machined Parts?
FR4 is a fiberglass-reinforced epoxy laminate commonly used in printed circuit boards (PCBs), insulating components, and structural parts where electrical insulation and mechanical stability are critical.
Key Advantages of FR4:
| Great dielectric strength and excellent insulation | Flame-resistant moisture moisture-resistant |
| Suitable for high voltage and precision electronic assemblies | CNC machining cost-effective material |
| Thermal and mechanical dimensional stability |
FR4 Machining Capabilities at MYT Machining
CNC Machining FR4 for High-Performance Applications
Our team is experienced in the challenges and requirements of FR4 CNC milling. We know that tighter tolerances, appropriate surface finish, and material integrity must be met at prototype levels to high-volume production.
Industries We Serve with FR4 Components:
We also understand how to prevent delamination in FR4 machining, one of the most common risks with this material. Our machining and advanced tooling processes and parameters contribute to integrity and reliability.
Comparing FR4 vs G10 in CNC Machining
FR4 vs G10 CNC machining is a frequent consideration for manufacturers. While both are fiberglass-reinforced laminates, FR4 includes flame-retardant properties, making it preferable for electrical insulation.
| Feature | FR4 | G10 |
| Flame Retardant | Yes – Contains brominated resin (UL94 V-0 rated) | No – Not inherently flame retardant |
| Primary Use | High-voltage insulation, electronics, aerospace | Mechanical parts, structural insulation |
| Electrical Insulation | Excellent – Ideal for electronic components | Very good, but slightly lower than FR4 |
| Machinability | Moderate – Requires special tooling to avoid delamination | Easier to machine – Less prone to delamination |
| Moisture Resistance | Highly Stable in humid environments | High – Similar to FR4 |
| Strength & Rigidity | High – Strong under thermal and mechanical stress | High – Slightly stiffer but less flame resistant |
| Cost | Slightly higher due to flame-retardant additives | Slightly lower |
| CNC Applications | PCB insulation, medical imaging, high-voltage parts | Structural frames, spacers, and support plates |
| Color | Typically yellow-green | Usually light green |
| Preferred For | High-voltage FR4 machined components | General industrial and mechanical use |
FR4 CNC Milling Services: What We Offer
Our precision CNC services for FR4 include:
- hallway and outside wall 2D milling; 3D milling
- Turning and boring
- Finishing and deburring of surfaces
- Close tolerance machining (+0.002” -0.002”)
- Artisan Prototyping and micro-runs
- Optimization of the tool path to minimize fiber pull and delamination
We also machine custom CNC parts with specialized geometries, making them ideal for integration into sensitive electronic assemblies.
Why Choose MYT Machining for FR4 Components?
Things that Make Our CNC Machining Edge
- Years of experience with CNC on composite materials
- Proven success in delivering high-voltage FR4 machined components
- Dimension and surface accuracies are checked in real-time QC
- Small lead time and production scaleability
- Design for manufacturability (DFM)
Benefits of Partnering with Us for FR4 Machining
- Flame-resistant as well as electrically insulated parts
- Better safety in high-voltage usage
- Steady quality of parts in medium to large quantities
- Observance of industry standards to the full extent
- Individualized service on intricate part shapes
Get Started with CNC Machined FR4 Today
Looking for trusted CNC machining of FR4? Whether you’re prototyping or ready for large-scale production, MYT Machining delivers CNC precision parts you can rely on.
Contact us today to request a quote or consultation with one of our machining experts.
FAQs – FR4 CNC Machining
1. What is FR4 used for in CNC machining?
FR4 is used to manufacture insulating components, PCBs, and high-voltage parts due to its strong mechanical and electrical properties.
2. Is FR4 difficult to machine?
Yes, FR4 is abrasive and prone to delamination. High machining quality results are aided by special tooling and optimum machining operations parameters.
3. What’s the difference between FR4 and G10?
FR4 contains flame-retardant resin, while G10 does not. FR4 is better for electrical insulation and high-heat environments.
4. Can you machine small or thin FR4 components?
Absolutely. No correlation has to be established between the geometry of the thin-walled parts, material integrity, and the accuracy of our CNC machines.
5. Do you offer prototyping for FR4 parts?
Yes, we offer FR4 prototyping services with rapid turnaround times for testing and refinement.
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