🧪 PEEK
PEEK Machining and Fabrication in Huntington, WV — Unfilled, Glass-Filled, and Carbon-Filled Grades
Polyether ether ketone — PEEK — occupies a performance tier that no other engineering thermoplastic can match. Its continuous service temperature of 480°F (250°C), broad chemical resistance, and tensile strength approaching 14,000 PSI (unfilled) allow it to replace metal in demanding environments where corrosion, weight, or electrical conductivity disqualify aluminum, stainless, or titanium. For Huntington's chemical processing and energy infrastructure sectors, PEEK components appear in pump wear rings, valve seats, bearing retainers, and subsurface equipment housings. ManufacturingBase connects local procurement teams with suppliers machining PEEK to tight tolerances from certified stock.
ISO 9001ISO 13485AS9100
Unfilled PEEK: The Baseline Grade for Chemical and High-Temperature Service
Unfilled PEEK (natural/beige color) is the foundational grade — the benchmark against which filled variants are measured. Its tensile strength of 14,000 PSI, flexural modulus of 600,000 PSI, and Class V94-0 flammability rating are achieved without any reinforcing fillers, giving it chemical resistance that filled grades can sacrifice. Unfilled PEEK resists continuous immersion in concentrated sulfuric acid below 98%, most organic solvents, hydraulic fluids, fuels, and steam — a resistance profile that makes it uniquely suited for fluid-contact components in Huntington's chemical processing operations.
For pump wear rings and bearing bushings in chemical service, unfilled PEEK provides a critical combination: it will not corrode in the process fluid, its low coefficient of friction (0.35 against steel dry) allows dry-running survival in the event of fluid loss, and its hardness (82 Shore D) resists abrasion without damaging mating metal surfaces as hard-coated metal wear rings can. Pump designers working with Huntington's process industry customers increasingly specify PEEK wear rings as standard rather than optional, recognizing the maintenance interval extension they deliver.
Machining unfilled PEEK requires sharp tooling and moderate cutting parameters — 400–600 SFM with positive rake carbide inserts, light depths of cut, and good chip evacuation. The material's thermal sensitivity means excessive heat from dull tooling causes melting rather than cutting, producing a poor surface finish and dimensional error. Holding ±0.001" on bores and ±0.0005" on fitted diameters is routine for CNC shops experienced with high-performance polymers.
Glass-Filled PEEK for Stiffness-Critical Applications
Glass-filled PEEK (GF30 — 30% glass fiber by weight) increases flexural modulus from 600,000 PSI to approximately 1,400,000 PSI and raises flexural strength from 24,000 to 36,000 PSI. This near-2.5x improvement in stiffness makes GF30 PEEK the correct specification for structural bearing housings, precision manifold bodies, and instrument components where deflection under load would cause misalignment or dimensional drift.
For Huntington's energy equipment suppliers producing custom bearing retainers and alignment fixtures, glass-filled PEEK delivers metal-like stiffness at one-fifth the density of aluminum, with the full PEEK baseline of chemical and temperature resistance intact. The glass reinforcement also reduces the coefficient of thermal expansion from 2.6 × 10⁻⁵ /°C (unfilled) to 1.4 × 10⁻⁵ /°C — important in applications cycling between ambient and elevated service temperatures where dimensional stability of mating parts must be maintained.
The tradeoff for GF30 is reduced chemical resistance at fiber-matrix interfaces and increased abrasiveness to mating metal surfaces compared to unfilled PEEK. Glass fibers are significantly harder than metal oxides and will score uncoated steel shafts in direct-contact applications. For fluid-contact surfaces where chemical resistance is the primary driver and stiffness is secondary, unfilled PEEK remains the better choice. ManufacturingBase suppliers can advise on grade selection based on the specific application requirements provided in the RFQ.
Carbon-Filled PEEK for Tribological and Thermally Conductive Applications
Carbon-filled PEEK (CF30 — 30% carbon fiber) achieves the highest strength and stiffness in the PEEK family: tensile strength of 22,000 PSI and flexural modulus of 2,200,000 PSI. Beyond mechanical properties, the carbon fiber addition makes CF30 electrically conductive (surface resistivity ~10² to 10⁴ Ω/sq) and improves thermal conductivity from 0.25 to approximately 1.0 W/m·K — the latter being significant for components where heat dissipation from the part is part of the design requirement.
The tribological advantage of carbon-filled PEEK is its self-lubricating behavior — carbon fiber acts as a solid lubricant, reducing the coefficient of friction to approximately 0.15–0.20 against steel. This makes CF30 PEEK the standard specification for seals, thrust washers, and bushings in dry-running or marginally lubricated bearing applications. For Huntington's energy sector applications involving rotating equipment and pump components where lubricant replenishment is infrequent, CF30 bearing components extend maintenance intervals and prevent seizure during dry-running events.
Machining carbon-filled PEEK requires attention to two additional factors compared to unfilled or glass-filled grades: the carbon fiber is abrasive and accelerates tool wear on carbide inserts — using coated carbide (TiAlN) or PCD inserts at 300–500 SFM improves tool life significantly. The material is also electrically conductive, which matters when specifying PEEK parts for electrical isolation applications — CF30 is NOT an electrical insulator and must not be substituted for unfilled PEEK in those applications.
Supply Chain and Procurement for PEEK in West Virginia
PEEK stock material — rod, sheet, and tube in standard sizes — is stocked by a limited number of specialty polymer distributors rather than general-line plastics houses. For Huntington buyers, reliable PEEK supply typically routes through distributors in Pittsburgh, Columbus, or Charlotte who maintain inventory of Victrex PEEK 450G and equivalent grades. ManufacturingBase aggregates these suppliers into a single searchable database, allowing buyers to identify who holds stock in the specific size and grade required for a job.
Lead times for PEEK machined parts are primarily driven by material availability. CNC machining of in-stock PEEK blanks to finished parts runs 1–2 weeks for simple components and 2–4 weeks for parts with tight tolerances, thread inserts, or multi-setup configurations. Large format plate (above 2" thick) and large-diameter rod (above 6" diameter) are not stocked items and require 4–6 weeks from the extruder. For Huntington buyers running recurring production of PEEK components, establishing a small buffer stock of PEEK blanks in the most common sizes eliminates the lead time exposure on urgent requirements.
For medical device or implant applications requiring FDA-grade PEEK (Invibio PEEK-OPTIMA or equivalent), the supply chain is even more restricted and material certification requirements are more demanding. ManufacturingBase's certification filters allow buyers to identify suppliers carrying FDA-compliant PEEK stock with appropriate documentation.
Frequently Asked Questions
PEEK is a viable replacement for 316 stainless steel in a specific subset of pump applications — primarily wear rings, bushings, impeller trim rings, and non-pressure-boundary liners where load and pressure requirements fall within PEEK's mechanical capability. PEEK's compressive strength (18,000 PSI for unfilled) and tensile strength (14,000 PSI) are substantially below 316 SS (75,000 PSI tensile), so pressure-boundary components like casings, flanges, and structural housings remain metal applications. The business case for PEEK in these limited roles is strong: it eliminates the galling and seizure failure mode common in metal-on-metal pump wear fits, survives dry-running events that would seize metal components, and resists the broad spectrum of process chemicals encountered in Huntington's chemical manufacturing operations. For buyers evaluating PEEK as a metal replacement, ManufacturingBase suppliers can produce prototype parts for performance validation before committing to production redesign.
For PEEK components used in oil and gas downhole applications, NACE MR0175 / ISO 15156 compliance documentation for sour service environments is often required, along with material traceability to a specific resin lot from the extruder. ISO 9001-certified machining shops provide CMTRs (certified material test reports) tracing the PEEK stock to the original resin supplier. For equipment operating under ASME B31.3 process piping code, non-metallic components require material designation per ASME standards with appropriate temperature and pressure derating. If the PEEK component interfaces with a process requiring third-party inspection or ASME stamp, the machining supplier's quality system needs to be compatible with the inspection authority. ManufacturingBase supplier profiles display ISO 9001 certification status and whether suppliers have experience with energy industry documentation requirements.
Unfilled PEEK machines to Ra 32–63 µin as a standard milled surface finish with carbide tooling. On turned bores and OD surfaces, Ra 16–32 µin is achievable with sharp inserts and light finishing passes — adequate for most sealing and bearing applications. For sealing surfaces requiring better finish, polishing PEEK with progressively finer abrasive (down to 400 grit) achieves Ra 8–16 µin. Unlike metals, PEEK cannot be ground on conventional abrasive wheels — the thermoplastic nature of the material causes glazing and smearing rather than cutting. Lapping with diamond paste on a flat lap produces the best results for precision flat surfaces. Glass-filled and carbon-filled grades produce slightly rougher surfaces than unfilled due to fiber pullout at the machined surface — Ra 32–63 µin is a more realistic expectation for filled grades on milled and turned features.
PEEK absorbs moisture at an extremely low rate — approximately 0.1–0.5% by weight at saturation — compared to 1–3% for nylon or 0.3–0.6% for acetal. This low moisture absorption means PEEK parts maintain their dimensions and mechanical properties in West Virginia's humid summer conditions without the swelling and strength degradation that limit moisture-sensitive polymers. At low temperature, PEEK retains toughness down to -60°C (-76°F), making it suitable for outdoor energy equipment exposed to winter conditions in the Ohio Valley. The material's glass transition temperature of 143°C (289°F) provides substantial margin above the ambient high temperatures in Huntington's industrial environments, and its continuous service rating of 250°C means even direct contact with hot process surfaces stays within the material's operating envelope.
PEEK raw material costs approximately $80–$150 per pound for standard Victrex 450G rod stock, compared to $3–8/lb for acetal, $5–15/lb for nylon, and $25–60/lb for PEI (ULTEM). This 10–30x cost premium over commodity engineering polymers is justified when the application requires any of PEEK's differentiating capabilities: continuous service above 180°C (which eliminates acetal, nylon, and most other polymers), resistance to steam autoclave sterilization (relevant for Huntington's medical device supply chain), resistance to aggressive organic solvents and acids that attack lower-cost polymers, or retention of mechanical properties under combined chemical and thermal loading. When none of these requirements are present — for example, a bracket that runs at room temperature in a clean environment — acetal or nylon provides better cost performance. ManufacturingBase suppliers help buyers right-size material selection by including alternative grade suggestions in their RFQ responses when a lower-cost alternative meets the stated requirements.
Last updated: July 2026
Find PEEK Manufacturers in Huntington, WV
Search verified Huntington shops that work in PEEK.
No logins. No email gates. Just results.