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About Pexco
Precision Machining
CNC Milling
Where Ideas Take Shape
Pexco’s CNC milling capabilities produce complex geometries with tight tolerances from high-performance plastic materials, utilizing 3-, 4-, and 5-axis equipment to machine components for aerospace, medical, semiconductor, and industrial applications. Our temperature-controlled machining facilities and advanced CAD/CAM integration enable precision manufacturing of intricate parts from solid stock, castings, or molded components. With expertise machining challenging materials like PEEK, Torlon, PFA, and filled compounds, we deliver exceptional surface finishes and dimensional accuracy across prototype and production volumes.
Multi-Axis Capabilities
Our milling capabilities scale to match component complexity:
3-Axis Milling
Machines along X, Y, and Z axes to create flat features, pockets, slots, and contoured surfaces. This approach handles prismatic parts efficiently, proving cost-effective for components with features accessible from a single orientation while delivering tight tolerances without complex setups.
4-Axis Milling
Adds rotary indexing around a single axis, enabling features to be machined around cylindrical or curved components without repositioning. Drilling, milling, and contouring operations occur at multiple orientations in one setup, reducing handling time and improving accuracy. Valuable for housings, connectors, and instrumentation parts requiring holes, slots, or mounting features around a central axis.
5-Axis Simultaneous Machining
Our most advanced capability, with the cutting tool moving continuously across five axes to create complex contoured surfaces, undercuts, and compound angles in a single setup. Eliminates multiple repositioning operations, reducing cycle time while improving dimensional accuracy and surface finish consistency. Essential for aerospace components, medical implants, and complex housings requiring intricate geometries impractical with conventional equipment.
Temperature-Controlled Precision
Our temperature-controlled machining environment maintains stable conditions critical when machining thermoplastics that expand and contract with thermal variation. Dimensional accuracy suffers when material temperature fluctuates during machining, particularly with thin-wall components or parts requiring tolerances below ±0.005 inches. Controlled temperature, combined with material-specific feed rates and tooling strategies, prevents thermal expansion issues that compromise dimensional stability.
Vision coordinate measuring machines (CMM) and toolmaker microscopes provide precision measurement and verification throughout the machining process. First-article inspection confirms dimensional accuracy before production runs, while in-process verification ensures consistency across batch quantities.
Material Expertise
Machining high-performance plastics requires specialized knowledge beyond conventional metalworking:
- Imidized Polymers (PEEK, Torlon, PBI): Demand sharp tooling and specific feed rates to prevent heat buildup and material degradation
- Fluoropolymers (PTFE, PFA): Require different strategies due to their tendency to deform under cutting pressure
- Filled Materials: Glass, carbon, or mineral content creates accelerated tool wear and potential delamination if machined improperly
Our expertise extends to selecting appropriate cutting tools, determining optimal speeds and feeds, and implementing cooling strategies that maintain material integrity throughout machining. This knowledge base enables us to machine materials that prove problematic for facilities lacking high-performance plastics experience.
CAD/CAM Integration
Advanced CAD/CAM software integration allows direct import of customer files in native formats, eliminating translation errors and enabling seamless programming. Our digital workflow supports rapid prototype-to-production transitions, with toolpath simulation and verification preventing costly programming errors before metal meets material. This integration proves particularly valuable when iterating designs or scaling from prototype to production volumes
Materials & Resins
Pexco machines high-performance plastics requiring precision milling:
Imidized Polymers
PAI (Torlon), Vespel (Polyimide), PBI – For extreme temperature resistance and mechanical strength
Advanced Fluoropolymers
PTFE, FEP, PFA, PVDF, ETFE – For chemical resistance and low-friction applications
Advanced Thermoplastics
PEEK, PEI (Ultem), PSU (Polysulfone), PPS (Ryton), EXTEM – For structural components requiring high strength and thermal stability
Filled Materials
Glass-filled, carbon-filled, mineral-filled compounds – For enhanced dimensional stability and wear resistance
Commodity Engineering Plastics
Nylon, Acetal, Polycarbonate, Acrylic – For cost-effective precision components
Why Choose Pexco?
3-, 4-, and 5-axis CNC milling capabilities
Temperature-controlled machining environments
Vision CMM and toolmaker microscope measurement
CAD/CAM integration for direct file import
Expertise machining challenging high-performance plastics
Material-specific tooling and cutting strategies
Prototype to production volume capabilities
ISO 9001:2015 and ISO 13485:2016 certified
Expertise machining challenging high-performance plastics
Rapid prototype-to-production transitions
Get Started
Contact Pexco’s precision machining team to discuss your CNC milling requirements and component specifications.