Contact Face Geometry as Primary Electrical Performance Discipline
Contact resistance R_contact = ρ_material / (2 × a_contact) where a_contact is the Hertz contact radius.
Custom
Electrical Contacts
CNCPioneer is an IATF 16949 and AS9100D electrical contact manufacturer making custom engineered electrical contacts, machined contacts and contact pins for relays, connectors, contactors, test probes and OEM assemblies.
IATF 16949 & AS9100D quality systems
Material and inspection scope reviewed with your drawing
Prototype and repeat-production enquiries
Finishing and documentation agreed with the order
DFMDrawing & process review
QCAgreed inspection plan
Electrical Contacts: Product Overview
A custom precision electrical contact is a machined or assembled conductive component that makes, breaks or maintains current flow in a relay, connector, contactor, switch, circuit breaker, slip ring or test fixture.
CNCPioneer reviews the operating current, voltage, switching duty, cycle life, environment, contact force and mating geometry before selecting an electrical contact manufacturing route.
- Contact face geometry as the primary electrical performance disciplineContact resistance R_contact = ρ_material / (2 × a_contact) where a_contact is the Hertz contact radius.
- Swiss CNC as the platform for miniature precision contact manufacturingReview contact geometry, mating diameters and plating allowance and functional requirements before defining the process.
- Copper-alloy selection for machined contactsSelect brass, copper, tellurium copper, beryllium copper, phosphor bronze or chromium zirconium copper around the contact's conductivity, strength, stock condition and machining requirements.
- Material, plating and electrical test controlConfirm material grade, delivery condition, finishing requirements and supporting records.
Why CNCPioneer for Electrical Contacts?
Coordinate geometry, material, finishing and inspection around the part's intended function.
Miniature Contact Geometry
Define the contact tip, retention features and rear termination from common datums. Review fine grooves, small bores and accessible measuring surfaces before selecting a turning route.
Material & Plating Matched to the Contact
Review the copper-alloy base material, temper and contact geometry together. Specify plating separately, including coating thickness, masked areas and whether critical dimensions apply before or after finishing.
Contact Assembly Interfaces
Provide mating-part dimensions and the required plated condition. Identify press fits, crimp or joining features and distinguish component inspection from electrical assembly validation.
Material Composition Verification as Quality Foundation
Electrical contact material composition directly governs contact resistance, arc erosion resistance, welding resistance, and service life.
Electrical Performance and Lot Verification
Contact programs can include four-wire resistance testing, spring-force verification, XRF material composition checks, plating-thickness records, CMM reports, profilometry and Certificate of Conformance documentation.
Electrical Contacts We Manufacture
Explore representative configurations and share your drawing for a product-specific review.
Machined Male Pin Contacts
Solid-turned male pin contacts for signal, power, and mixed-signal connector systems, cut from precision bar stock on Swiss CNC sliding-headstock lathes.
Machined Female Socket Contacts
Spring-finger and collet-type socket contacts turned from bar stock on Swiss CNC, with precision multi-slot spring fingers providing defined insertion force and contact force for mating pin engagement.
RF and Coaxial Center Contacts
Precision Swiss CNC-turned center conductors for SMA, SMP, SMPM, MCX, MMCX, N-type, BNC, TNC, and 2.4mm / 2.92mm / 3.5mm RF connector families requiring tight dimensional control for 50Ω or 75Ω impedance geometry.
PCB Through-Hole and Press-Fit Pin Contacts
Machined PCB pin contacts for through-hole solder mounting and compliant press-fit PCB assembly produced from bar stock on Swiss CNC.
Spring-Loaded Pogo Pin Contacts
Swiss CNC-machined barrel, plunger, and tip assemblies for spring-loaded electrical contacts (pogo pins) used in ICT test fixtures, functional test, battery contacts, wireless charging contacts, and board-to-board interim connections.
High-Reliability and MIL-Spec Connector Contacts
Precision Swiss CNC-machined contacts for MIL-SPEC circular and rectangular connectors, aerospace wiring harness systems, defense electronics, and medical device connector programs requiring full material and dimensional traceability.
Industries & Applications
Match the component to its operating environment, assembly interfaces and documentation requirements.
Automotive
Machined terminals and contact pins for vehicle connectors, sensors, and switches. Specify mating geometry, current requirements, plating, and vibration exposure for the assembly.
Explore automotive machining
Medical Equipment
Custom pin and socket contacts for diagnostic equipment, instrument connectors, and device interfaces. Define contact finish, mating cycles, cleaning compatibility, and inspection records.
Explore medical machining
Semiconductor
Machined probe tips, contact pins, and pogo-pin components for semiconductor test fixtures and equipment interfaces. Review tip geometry, contact resistance, wear, and plating requirements.
Explore semiconductor machining
Aerospace
Pin and socket contacts for aircraft wiring connectors, avionics, and instrumentation. Specify termination geometry, contact finish, material traceability, and drawing-specific inspection requirements.
Explore aerospace machining
Robotics & Automation
Power and signal contacts for robot connectors, tool changers, and automated docking interfaces. Review alignment, repeated mating, contact force, and coating wear for the connection.
Explore robotics machining
Oil & Gas
Electrical connector pins and terminals for field instruments, sensors, and monitoring equipment. Confirm temperature exposure, corrosion conditions, insulation interfaces, and contact material requirements.
Explore oil & gas machiningMaterials
Materials for Electrical Contacts
Copper and copper-alloy bar stock for Swiss-machined and turned electrical contacts. Match the grade and temper to conductivity, strength and contact geometry. Specify gold, silver, nickel or tin plating separately from the base material, and confirm the material and finish with your drawing.
Turned Pins & Contact Bodies
C36000 Free-Machining Brass
A readily machined option for connector pins, socket bodies and terminals. Match conductivity and mechanical requirements to the application, and specify lead-content requirements, plating and any crimp features on the drawing.
Conductive Power Contacts
C11000 / C10200 Copper
High-conductivity copper for power pins, terminals and current-carrying contact bodies. Define the copper grade and temper, mating surfaces and plating allowance; current capacity depends on the complete contact and connector design.
Conductivity & Machinability
C14500 Tellurium Copper
Combines high electrical conductivity with improved machinability compared with unalloyed copper. Useful for turned power contacts and terminals with steps, bores or threads. Specify stock condition and the required contact finish.
Strength & Resilient Contacts
C17200 Beryllium Copper
A high-strength copper alloy for resilient socket contacts and contact components subject to repeated mating. Specify material temper, heat-treatment condition and contact geometry; spring force and service life require validation in the assembly.
Durable Machined Contacts
C54400 Phosphor Bronze
A machinable phosphor bronze for turned pins and electrical connector parts where strength and wear resistance matter. Review conductivity, material condition and lead-content requirements against the specified contact design.
Conductivity with Added Strength
C18150 Chromium Zirconium Copper
CuCrZr offers a balance of electrical conductivity, strength and resistance to softening at elevated temperatures. Consider it for loaded power-contact components, with heat-treatment condition, contact geometry and finishing agreed for the application.
Finish selection
Surface Treatments for Electrical Contacts
Select the finish around the specified material, functional surfaces and service conditions. Confirm process details and acceptance requirements with your drawing.
Plating selection
Gold (Au) Plating
The standard contact surface finish for low-level signal contacts in relays, connectors, and switches.
- Best for
- Contact, appearance or barrier requirements
- Specify
- Coating stack, thickness & masking
Finish selection
Palladium-Nickel (PdNi) Plating
The best balance of cost, hardness, and corrosion stability for connector contacts that cannot use gold due to cost.
- Best for
- Drawing-specific surface requirements
- Specify
- Process, functional surfaces & acceptance
Finish selection
Rhodium (Rh) Plating
For maximum hardness (HV 800–900) and minimum wear in sliding contact applications.
- Best for
- Drawing-specific surface requirements
- Specify
- Process, functional surfaces & acceptance
Finish selection
Ruthenium (Ru) Plating
For dry-circuit relay contacts with minimum contact resistance and maximum cycle life.
- Best for
- Drawing-specific surface requirements
- Specify
- Process, functional surfaces & acceptance
Finish selection
Electroless Nickel
Corrosion protection and diffusion barrier undercoat for all precious metal plated contact bodies.
- Best for
- Drawing-specific surface requirements
- Specify
- Process, functional surfaces & acceptance
Finish selection
Tin (Sn) Plating
For low-cost, solderable contact surfaces in PCB-mounted contact assemblies.
- Best for
- Drawing-specific surface requirements
- Specify
- Process, functional surfaces & acceptance
Production Capacity
Machining resources for drawing review, prototypes and repeat-production programs.
Swiss CNCPrecision turned components
Mill-turnCombined machining
Inspection & documentation
Quality Control for Electrical Contacts
Review material identity, machining datums, functional dimensions and production records for your component.
IATF 16949AS9100D
To drawingCritical dimensions
As agreedInspection scope
Final tolerances, inspection coverage and acceptance criteria are confirmed against your drawing, material and geometry.
Material Verification
- Check
- Specified grade, material condition and lot identity.
- Verify
- Material certificates and agreed identification checks.
- Records
- Material certificates and required traceability records.
Machining Process Control
- Check
- Contact geometry, mating diameters and plating allowance.
- Verify
- Drawing datums, setup planning and in-process inspection.
- Records
- Agreed critical-feature and process inspection records.
Dimensional Inspection
- Check
- Functional dimensions, mating features and surface condition.
- Verify
- Suitable measuring equipment and drawing-specific gauges.
- Records
- Dimensional reports and specified finish results.
Production Documentation
- Check
- First-piece approval, production records and delivery requirements.
- Verify
- The inspection plan and customer approval process.
- Records
- Agreed document pack, including PPAP or FAIR when required.
Agree Your Quality Document Pack
Confirm the certificates, inspection reports and production records needed for your order when sharing your drawing.
Electrical Contacts FAQ
Which Electrical Contacts designs can you manufacture?
The product range includes Machined Male Pin Contacts, Machined Female Socket Contacts, RF and Coaxial Center Contacts. Custom geometry is reviewed against the approved drawing.
- Include the mating interfaces, critical datums and expected order quantity.
Which materials can I specify?
For machined electrical contacts, material options include C36000 brass, C11000 or C10200 copper, C14500 tellurium copper, C17200 beryllium copper, C54400 phosphor bronze and C18150 chromium zirconium copper. Confirm the exact grade, stock form and temper against the drawing and contact function.
- Specify plating separately from the base metal, including coating thickness and dimensional allowance.
- Include material certificates, lead-content requirements and any electrical or mechanical acceptance tests with your enquiry.
What should I include in the drawing?
Define contact geometry, mating diameters and plating allowance, together with datums, tolerances and required surface condition.
- Include a 2D drawing and 3D model where available.
- Identify the dimensions that affect assembly or function.
What finishing and inspection records can be requested?
Finishing options include gold (au) plating, palladium-nickel (pdni) plating, rhodium (rh) plating. Applicability is reviewed against the specified material and geometry.
- Agree material certificates, dimensional reports and any PPAP or FAIR requirements with the order.
How are pricing and lead time confirmed?
Pricing and delivery are confirmed after reviewing the drawing, material availability, quantity, machining route, finishing and inspection scope.
- Prototype and repeat-production schedules are quoted for the specific order.
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Get a Quote for Electrical Contacts
Share your drawing or 3D model, material, critical dimensions, finish and order quantity. We’ll review the machining route, inspection scope and delivery requirements.
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