PC GF30

PC GF30 is a 30% glass fiber reinforced polycarbonate that offers a significant leap in mechanical performance compared to standard unfilled grades. By incorporating glass fibers, this material achieves exceptional rigidity, high tensile strength, and a drastically reduced thermal expansion coefficient. It maintains the inherent impact resistance and flame retardancy of polycarbonate while providing the structural integrity required for heavy-duty industrial housings. At Jucheng Precision, we specialize in the high-tolerance CNC machining of this abrasive reinforced polymer. Utilizing advanced diamond-coated tooling and rigid machine setups, we deliver precision-engineered PC GF30 components that excel in demanding structural applications within the automotive, electrical, and industrial sectors.

Back to Materials Get a Quote

Polycarbonate (PC) Material Variants

Grade	Common Name	Key Characteristics	Typical Applications
PC GF30	30% Glass Filled PC	Highest rigidity and dimensional stability. Exceptional heat resistance and tensile strength. Opaque.	Industrial brackets, structural housings, electrical equipment frames.
Machine Grade PC	Stress-Relieved PC	Unfilled and transparent. Specially annealed to remove internal stress for precision machining.	Manifolds, sight glasses, semiconductor components.
Optical Grade PC	Lexan® / Makrolon®	Highest light transmission and clarity. Optimized for vapor polishing to achieve mirror finishes.	Lenses, light pipes, windows, automotive lighting.

PC GF30 Machining Capabilities

Capability	Technical Description	Jucheng Advantage
Abrasive-Resistant Milling	The 30% glass fiber content is highly abrasive. We utilize diamond-coated (CVD) or sub-micrograin carbide cutters.	Ensures consistent dimensions and sharp edges over long production runs by preventing tool blunting.
Rigid Structural Machining	Leveraging PC GF30’s high modulus to machine thin-walled structural housings that maintain their shape.	Our 5-axis machines achieve tight tolerances (+/- 0.02mm), preventing the part flexing common in unfilled plastics.
Precision Boring & Reaming	Creating accurate bearing seats and fastener holes in reinforced polycarbonate.	Specialized reaming strategies prevent glass fiber “tear-out,” ensuring perfectly smooth internal diameters and secure fits.
High-Speed Finishing	Optimized tool paths to achieve a clean matte finish without the “fuzzy” surface common with filled plastics.	Delivers professional, industrial-grade aesthetics directly off the machine for visible structural components.

Fabrication Guidelines for PC GF30

Abrasiveness Management:
PC GF30 wears down standard tools rapidly. Tip: We frequently monitor tool life and use automated compensation to ensure “size drift” does not occur during large batch production.

Non-Transparent Nature:
Adding glass fiber makes the PC opaque (usually grey or black). Tip: This grade cannot be polished to transparency. Design for mechanical performance rather than optical clarity.

Brittle Behavior:
Reinforced PC is more brittle than standard polycarbonate. Tip: We avoid sharp internal corners and use generous radii to prevent stress concentrations that could lead to cracking under structural load.

Chemical Sensitivity:
Like all polycarbonates, GF30 is sensitive to certain oils and solvents. Tip: We use strictly compatible, water-soluble coolants to prevent chemical stress cracking (crazing).

Primary Applications

Industrial Equipment
Heavy-duty structural brackets, mounting plates, and pump components requiring high rigidity and dimensional stability.

Electrical & Electronics
High-load connector housings, circuit breaker components, and standoff insulators that must resist heat and impact.

Automotive Engineering
Under-the-hood struct

Properties

Density	1.42 - 1.45 g/cm³
Tensile Strength	100 - 120 MPa
Elastic Modulus	5.5 - 6.5 GPa
Hardness	90 Rockwell M
Heat Deflection Temp	145 - 150 °C
Continuous Service Temp	120 °C
Water Absorption	0.10%
Dielectric Strength	18 kV/mm
Flammability Rating	UL94 V-0
Max Part Size	2000 x 800 x 600 mm