Custom CNC Machined Inductive Sensor Coil Brackets

FlexiTurn provides precision CNC machining of high-performance engineering plastic components, exemplified by the I-shaped PEEK coil bobbins shown. PEEK is the industry-standard material for premium sensor coils, offering inherent dielectric strength, 260°C continuous service temperature, wear resistance and low outgassing.

Precision coil bobbins demand tight control of bore consistency, flange-to-bore parallelism and edge integrity for uniform winding, reliable insulation and interchangeable assembly. General plastic shops with repurposed metal tooling and uncontrolled cutting heat produce thermal drift, burrs, fraying and warpage — defects causing winding misalignment, partial discharge and reduced sensor accuracy. FlexiTurn’s plastic-dedicated CNC milling mitigates these issues, delivering repeatable dimensional accuracy from prototype to medium-volume production.

Machining Process & Capabilities

FlexiTurn executes all core machining in-house, with tooling, cutting parameters and cooling calibrated exclusively for engineering plastics to eliminate heat-induced deformation and burr formation.

• 3-Axis CNC Milling: I-shaped profiles, square inner bores and flange faces are machined from certified solid PEEK bar stock using sharp, polished carbide tooling, optimized feed rates and chilled air cooling. This minimizes cutting heat buildup, prevents material softening and maintains true bore geometry and flange parallelism.
• Precision Workholding: Low-clamping-force fixtures with soft contact surfaces support thin flange features to avoid deflection and surface marring during machining.
• Controlled Deburring: Critical winding edges and bore corners are deburred to controlled specifications, removing residual burrs without rounding functional locating surfaces.
• High-Volume Hybrid Option: For volume production programs, we offer precision injection-molded PEEK blanks with secondary CNC finishing to upgrade tolerance grades, balancing unit cost and precision requirements.

Materials & Dimensional Specifications

FlexiTurn sources certified premium engineering plastic bar stock, with full material traceability and compliance documentation for every order.

• Standard material: Natural unfilled PEEK; glass-filled PEEK, PPS and other high-performance engineering plastics available on request
• General dimensional tolerance: ±0.05 mm relative to nominal datum
• Precision bore tolerance: ±0.02 mm relative to central datum
• Flange face parallelism: ≤ 0.03 mm relative to bore reference face Surface finish: As-machined Ra 1.6–3.2 μm; edge-conditioned finish available on request
• Maximum machining envelope: 200 mm × 200 mm × 100 mm

Why Choose FlexiTurn

Plastic-Dedicated Machining

Most general machine shops process PEEK with the same tooling, speeds and feeds used for aluminum or steel, generating excessive cutting heat that causes thermal drift, fraying and dimensional scatter. FlexiTurn uses polished carbide tooling, optimized cutting parameters and chilled air cooling purpose-built for engineering plastics, delivering cleaner edges, tighter bore control and more consistent batch-to-batch accuracy.

Functional-Driven Process Control

Coil bracket performance depends on bore geometry, flange parallelism and edge quality — not cosmetic appearance. FlexiTurn prioritizes in-process dimensional verification of functional features over generic visual inspection, ensuring every part meets performance-critical tolerances.

Scalable Production from Prototypes to Volume

FlexiTurn supports full product lifecycles: low-volume prototypes machined directly from bar stock with no tooling cost, and medium-volume production via hybrid molded-blank + CNC finishing to balance cost and precision.

Full-Spectrum CNC Machining Partner

Beyond plastic components, FlexiTurn is a full-spectrum precision CNC machining manufacturer producing metal components in aluminum, stainless steel, brass and alloy steels, plus precision pre-machined billets. We can consolidate your complete bill of materials for sensor assemblies, including both insulating plastic and structural metal parts.

In-House Quality & Traceability

All core operations — machining, deburring and final inspection — are completed in-house with zero subcontracting of critical processes. Full material batch traceability is maintained from raw bar stock to finished part, and all production adheres to our ISO 9001:2015-aligned quality management system.

How to Proceed

• Submit your 2D (PDF/DWG) or 3D (STEP/IGES) CAD files, along with material grade, tolerance requirements, finish specifications, order quantity and operating environment details.
• Receive a PEEK-specific DFM assessment and transparent factory-direct quotation from FlexiTurn within 24 hours.
• Prototype parts are manufactured and delivered with full inspection reports and material certification for design validation and performance testing.
• Scale seamlessly to volume production with locked process parameters and scheduled in-process dimensional verification.
• Global shipping with protective packaging, delivered directly to your facility.

For custom CNC machined inductive sensor coil brackets and precision PEEK components engineered for consistent winding, insulation and assembly performance, partner with FlexiTurn. Contact our engineering team today to submit your CAD files and request your free project assessment and custom quotation.

FlexiTurn – Precision Machining, Delivered with Trust.