PEEK GF30

PEEK GF30 is a 30% glass fiber reinforced high-performance polymer that offers significantly higher stiffness and creep resistance than unfilled PEEK. By incorporating glass fibers, the material's thermal expansion is drastically reduced, and its heat deflection temperature is significantly increased, making it ideal for structural applications under heavy loads at high temperatures. Jucheng Precision excels in the CNC machining of this abrasive material, utilizing specialized diamond-coated tooling and rigid 5-axis setups. We deliver precision-engineered PEEK GF30 components for the aerospace, industrial, and energy sectors, ensuring exceptional dimensional stability and mechanical reliability.

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PEEK GF30

PEEK GF30 Machining Capabilities

Capability Technical Description Jucheng Advantage
Abrasive-Resistant Milling PEEK GF30 is highly abrasive to tools. We use specialized diamond-coated (CVD) or sub-micrograin carbide cutters to maintain edge sharpness. Our tooling strategy ensures consistent tolerances across long production runs, preventing the “size drift” common when glass fibers wear down standard tools.
Tight-Tolerance Machining Achieving +/- 0.02mm tolerances on rigid structural housings and connectors. The added glass fiber reduces thermal expansion, allowing us to hold tighter dimensions than virgin PEEK, even in varying workshop temperatures.
5-Axis Structural Milling Machining complex aerospace brackets and engine-zone insulators with intricate geometries. Our rigid Haas/Mazak machines handle the high-modulus material with zero vibration, delivering superior surface integrity and crisp features.
Deburring & Edge Finishing Cryogenic deburring and manual micro-deburring under high magnification. Glass-filled plastics produce stubborn burrs. Jucheng ensures every part is 100% burr-free, essential for high-voltage and aerospace safety.

Fabrication Guidelines for PEEK GF30

Tool Wear Management:
The 30% glass fiber content is extremely abrasive. Tip: We monitor tool life strictly and use automated tool-length sensors to compensate for wear, ensuring every part in the batch is identical.

Fiber Orientation Awareness:
The strength of GF30 is non-isotropic (stronger along the fiber direction). Tip: We source high-quality extruded stock with uniform fiber distribution to prevent warping and ensure predictable mechanical strength.

Surface Finish Limitations:
Due to the glass fibers, GF30 will not achieve the same “mirror” finish as virgin PEEK. Tip: It naturally produces a matte finish. If a smoother surface is required, we can perform specialized buffing, though the matte look is standard for this grade.

Coolant Strategy:
Water-based flood coolant is used to wash away abrasive glass dust and keep the cutting zone cool, preventing tool overheating and material discoloration.

Primary Applications

Aerospace & Defense
Structural airframe components, electrical housings, and engine-zone standoff insulators requiring high stiffness and flame resistance.

Oil & Gas
High-pressure backup rings, valve seats, and electrical connectors for downhole tools operating in extreme temperatures and pressures.

Industrial Machinery
Wear strips, guide rails, and structural bushings where high load-bearing capacity and dimensional stability are required.

Electrical & Electronics
High-voltage insulators and semiconductor wafer handling tools that must maintain their shape under thermal cycling.

Properties

Density 1.49 - 1.53 g/cm³
Tensile Strength 150 - 165 MPa
Elastic Modulus 10 - 12 GPa
Hardness 88 Shore D
Heat Deflection Temp 315 °C
Continuous Service Temp 250 °C
Water Absorption 0.10%
Dielectric Strength 18 - 20 kV/mm
Machinability Rating Low
Max Part Size 2000 x 800 x 600 mm