FR4 CNC Machining Services
Flame-resistant, strong, and electrically insulating parts—machined with high precision to meet your toughest specs.
- All uploads are secure and confidential
Certifications
ISO 9001:2015 | ISO 13485：2016 | IATF16949
Order CNC Machined FR4 Parts Today
FR4 is a high-strength, flame-retardant glass fiber epoxy laminate, closely related to G-10 but with added flame resistance. We provide expert CNC machining services for FR4, ensuring tight tolerances and reliable performance. Upload your drawings now and let our expert team deliver pinpoint-accurate FR4 parts tailored to your exact specifications.
CNC Machining Capability in FR4 Materials
Our advanced equipment enables precise cutting, drilling, milling, and finishing of FR4 parts to meet exact specifications for a wide range of industrial and electronic applications.
| Standards | Detail |
|---|---|
|
Tolerances |
+/- 0.01 mm |
|
Maximum Part Size |
4000 mm×1500 mm×600 mm |
|
Minimum Feature Size |
Φ 0.50 mm |
|
Wall Thickness |
0.5 mm |
|
Standard Lead Time |
3 business days |
|
Price |
$ $ $ |
|
Available FR4 at BOYI |
FR4 Aqua Green, FR4 Yellow |
FR4 Material Properties
| Tensile Strength | Young's Modulus | Elongation at Break | Hardness | Thermal Conductivity | ESD Safety |
|---|---|---|---|---|---|
|
240 – 310 MPa |
12 – 27 GPa |
0.008 – 0.01 % |
100 – 110 HRM |
0.29 – 0.34 W/(m⋅°C) |
No |
Finishes for FR4 CNC Machined Parts
We offer a variety of post-machining finishes for FR4 to ensure both functional performance and cosmetic quality.
The polished finish offers a high gloss, smooth surface with Ra 0.8μm (Ra 32μin) roughness, ideal for mirror-like applications.
Bead Blasting
Metals or plastics parts surface is left with a smooth, matte appearance, with no thickness removal specified.
As Machined
This finish retains visible tool marks and is suitable for both metals and plastics. There is no specific thickness removed in this finish.
Painting
Available for metals and plastics, this finish can be matte, gloss, or textured, with color matching possible.
What is FR4?
FR4 (or FR-4) is a flame-retardant glass-reinforced epoxy laminate used widely in electrical and mechanical applications. The name “FR4” refers to a material grade defined by NEMA (National Electrical Manufacturers Association), where “FR” stands for flame retardant, and “4” indicates it meets certain standards for flame resistance and performance.
FR4 is closely related to G10, with the key distinction being flame retardancy: FR4 meets UL94 V-0 standards, making it a fire-retardant version of G10. Because of this, FR4 can be safely substituted in most applications where G10 is specified.
FR4 CNC Machining Applications
Printed Circuit Boards (PCBs)
Insulating spacers and covers
Structural components in electronics
High-voltage insulators
Lightweight panels for aerospace and automation
Key Benefits of Machining FR4
Self-extinguishing, meets UL94 V-0 rating.
Good mechanical performance under stress.
Excellent dielectric strength and low electrical conductivity.
Maintains form and properties in humid or thermally variable environments.
Can be precisely CNC machined, drilled, or milled.
