Composite CNC Machining-Chongqing Taidexing Precision Mould-Precision mold machining

Taidexing offers composite materials such as carbon fiber, fiberglass and polymers. Lightweight, strong and corrosion resistant, composites are ideal for industries such as aerospace, automotive, and electronics.

Our expertise in CNC carbon fiber machining ensures tight tolerances and surface finish, enabling the creation of superior quality custom carbon fiber parts that meet the demands of high performance applications.

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Advantages of CNC Composite parts

High Strength-to-Weight Ratio

Composite materials such as carbon fiber and fiberglass offer exceptional mechanical strength while remaining lightweight, making them ideal for aerospace, automotive, and drone components.

Excellent Fatigue and Impact Resistance

CNC-machined composite parts can withstand repeated stress and sudden impacts without cracking or deforming, ensuring long-term durability in dynamic applications.

Corrosion and Moisture Resistance

Unlike metals, composite materials are inherently resistant to moisture, corrosion, and chemical degradation, enabling their use in marine, outdoor, and chemical processing environments.

Tailorable Properties

The layered structure of composites allows engineers to customize strength, stiffness, and thermal performance in specific directions—providing optimized functionality for each CNC-machined component.

Low Thermal Conductivity

Many composite materials act as thermal insulators, making them ideal for applications requiring heat resistance or thermal management, such as electronic housings and structural panels.

Design Flexibility and Complex Geometry

Composites are well-suited for CNC machining of intricate shapes and undercut features that may be difficult or cost-prohibitive to produce in metals, expanding design possibilities for advanced industries.

Common Composite CNC Machining Materials

Carbon Fiber

Glass Fiber (GFRP)

Polymer Matrix Composites (PMCs)

Carbon fiber is a lightweight, high-strength composite material widely used in aerospace, automotive and electronics. It has high precision, corrosion resistance, thermal stability and good strength and rigidity, and is particularly suitable for precision parts, lightweight design and applications in high-temperature environments.

Model	Density (g/cm³)	Tensile Strength	Tensile Modulus	Thermal Stability	Conductivity
T300	1.76	3500	230	Medium	High
T700	1.8	4900	240	High	High
T800	1.81	5880	294	High	High
M40J	1.78	4120	377	High	Medium
IM7	1.8	5700	276	High	Medium
HM	1.85	2400	540	High	Low

Glass fiber (GFRP) is a high-strength, lightweight composite material with excellent corrosion resistance and electrical insulation, widely used in CNC machining. It is suitable for the manufacture of chemically resistant parts, electrical insulators and lightweight structural components. Due to its good hardness, toughness and processability, fiberglass is commonly used to produce structural parts and housings, especially with the support of reinforcing materials such as epoxy and phenolic resins, which provide higher impact resistance and thermal stability.

Model	Density (g/cm³)	Tensile Strength （MPa）	Thermal Stability	Hardness	Insulation	Corrosion resistance
G10	1.80-1.90	150-220	130-180°C	High	Excellent	Strong
FR4	1.80-1.90	100-250	120-140°C	Medium	Good	Medium
G11	1.80-1.90	200-250	150-180°C	High	Excellent	Strong
CEM-1	1.80-1.90	100-150	100-130°C	Medium	Average	Medium
CEM-3	1.80-1.90	120-200	110-130°C	Medium	Good	Medium

Polymer Matrix Composites (PMCs) are lightweight, high-strength materials made from polymer matrices, often reinforced with fibers like carbon, glass, or Kevlar. Known for their excellent corrosion resistance, thermal stability, and mechanical strength, PMCs are ideal for manufacturing high-performance components. Their low density reduces part weight, while maintaining structural stability and impact resistance, making them popular in aerospace, automotive, sports, and medical industries.

Material Type	Density (g/cm³) Tensile	Strength (MPa)	Modulus of Elasticity (GPa)	Heat resistance
Carbon Fiber Reinforced Polymer (CFRP)	1.5-2.0	~3500	230-450	High
Glass Fiber Reinforced Polymer (GFRP)	~1.9	~1000	70	High
Kevlar (Aramid) Reinforced Polymer (AFRP)	~1.4	~3000	130	Medium
Natural Fiber Reinforced Composites	1.0-1.5	100-300	10-20	Low
High Performance Polymer Matrix Composites	1.3-1.6	200-400	20-50	High

Composite CNC Machining Tolerances

CNC machining of composite components requires a careful balance between precision and material integrity. For materials like carbon fiber reinforced polymers (CFRP) or glass fiber composites, we optimize our machining processes to minimize delamination, fiber pull-out, and edge fraying while achieving functional accuracy. By utilizing specialized tooling, controlled feed rates, and vacuum fixturing, we consistently deliver precise tolerances on critical features such as mating surfaces, mounting holes, and alignment points.

	Standard Tolerance	Tight Tolerance
Dimension	±0.10 mm	±0.05 mm
Hole Diameter	±0.08 mm	±0.03 mm
Flatness (100 mm)	0.10 mm	0.05 mm
Parallelism	0.10 mm	0.05 mm
Perpendicularity	0.15 mm	0.07 mm
Roughness	Ra 6.3 μm	Ra 1.6 μm
Concentricity	±0.10 mm	±0.05 mm