PEEK GF30 for high stiffness, high load machined components

PEEK GF30 is a grade of PEEK reinforced with 30 percent glass fibers. The reinforcement increases stiffness, strength, and dimensional stability, making it suitable for structural and load-bearing machined parts.

Choose PEEK GF30 when your part needs higher rigidity, lower thermal expansion, or improved dimensional stability under load or temperature changes. It is preferred for brackets, housings, supports, and components that must resist bending.

GF30 provides excellent stiffness and stability, while CF30 offers even higher rigidity and lower thermal expansion. GF30 is often chosen for structural strength, whereas CF30 is chosen for precision parts exposed to heat or requiring very low deformation.

GF30 is not designed specifically for low-friction or high-wear situations. For sliding components, bearing-grade PEEK or PTFE-filled formulations generally perform better.

Yes. The added stiffness and abrasiveness of the glass fibers require sharper tooling, slower feeds, and careful heat management. Using carbide tools and planning for higher tool wear helps maintain tolerances and surface finish.

Yes. GF30's reduced thermal expansion and improved dimensional stability support tight tolerances, especially when parts are allowed to relax between roughing and finishing passes.

Yes. Although reinforced with glass fibers, GF30 maintains strong electrical insulation properties and performs well in high-temperature or humid environments.

PEEK GF30 has low moisture absorption, similar to unfilled PEEK. This helps machined components maintain shape, size, and electrical performance in humid or wet environments.

PEEK GF30 is supplied as extruded rods and plates in standard diameters and thicknesses. Custom dimensions can be produced on request.

Yes. GF30 maintains performance at elevated temperatures, with stiffness and dimensional stability that exceed unfilled PEEK. Exact operating limits depend on the specific grade.

While PPS GF40 has a higher flexural modulus (it is more rigid), it is notoriously brittle. PEEK GF30 is chosen when you need that high stiffness combined with toughness. If your part is subject to impact, vibration, or "snap-fit" assembly, PPS GF40 will likely shatter, whereas PEEK GF30 will hold.

PEEK GF30 is the gold standard for hydrolysis resistance. It can survive thousands of autoclave cycles or "downhole" steam environments without losing mechanical properties. PPS is also good, but Ultem GF30 (PEI) can begin to lose its strength over long-term continuous exposure to high-pressure steam.

For "as-machined" precision, Ultem GF30 often wins. As an amorphous polymer, it has very low and uniform shrinkage.

Yes, often. PPS is frequently called "the smart man's PEEK" because its chemical resistance is actually superior in some specific cases (it has no known solvents below 200°C). If the operating temperature is below 220°C and there is no high impact, PPS GF40 is the most cost-effective choice.

Ultem (PEI) has one of the highest dielectric strengths of any available thermoplastic. While PEEK is a good insulator, Ultem's electrical properties remain more stable across a wide range of temperatures and frequencies, and it is inherently flame-retardant (V-0) with very low smoke evolution.

PEEK GF30 generally offers the best long-term creep resistance at elevated temperatures. While PPS GF40 is very stiff initially, PEEK's semi-crystalline structure allows it to maintain its "geometric memory" better when pushed to 200°C+.

Actually, it's usually the other way around. However, Concentrated Sulfuric Acid and Nitric Acid will quickly degrade PEEK. On the flip side, Ultem is very sensitive to Ketones (like Acetone) and Methylene Chloride, which can cause it to crack instantly (Environmental Stress Cracking), while PEEK remains unaffected.

All three are "tool killers" because of the glass reinforcement. However, PPS GF40 is the most abrasive due to its higher (40%) glass loading and ceramic-like hardness. You must use PCD (Diamond) or high-grade carbide tooling for all three to maintain a good surface finish.

Yes, all three offer significant weight savings (roughly 80% lighter than steel). PEEK GF30 is the most common metal replacement for structural aerospace or oil-field parts because its strength-to-weight ratio remains stable even at high temperatures where aluminum or other plastics might fail.

PEEK GF30 is the most resilient to thermal cycling. Its balance of high ductility and high-temperature strength allows it to expand and contract without developing the micro-cracks that can occur in more brittle materials like PPS.