CNCPioneer is a precision spring loaded contact pins manufacturer delivering high-reliability spring loaded electrical contact components with tolerances as tight as ±0.003mm — 78+ Swiss CNC lathes, 66+ MAZAK mill-turn centers, gold, rhodium, silver, and palladium plating, wearable charging contacts through heavy industrial power spring contacts.
Spring loaded contact pins — also known as pogo pins, spring probe pins, or spring contact pins — are precision-machined electromechanical components that establish temporary, repeatable electrical connections through a spring-actuated plunger mechanism.
Spring loaded electrical contact pins maintain consistent, controlled contact force over a defined compression range regardless of mechanical tolerances, thermal expansion differences, or dimensional variation in the mating assembly.
Coordinate geometry, material, finishing and inspection around the part's intended function.
Plunger shaft ±0.003mm matched with barrel bore ±0.003mm produces consistent 0.005–0.015mm sliding clearance across production lots — smooth compression without stiction, minimum lateral play, no individual part matching or selective assembly required.
Swiss CNC lathe guide bushing support enables plunger shaft diameters as small as Ø0.3mm with barrel bore as small as Ø0.35mm — covering ultra-miniature smart ring and wearable charging contacts through large-diameter industrial power spring contacts.
Review contact geometry, mating diameters and plating allowance and functional requirements before defining the process.
Plunger, spring, and barrel components assembled and functionally tested — contact resistance ≤20mΩ at rated contact force verified, spring force within ±10%, over-travel range confirmed — delivered ready for direct installation into customer housing designs.
Gold plating on plunger tip and barrel external contact zone only — reduces precious metal cost 40–60% for high-volume consumer electronics spring contact applications while maintaining full contact performance at the critical electrical interface zones.
Review plunger and barrel dimensions, tip geometry and plating allowances so finished component clearances can be checked against the assembly specification.
Explore representative configurations and share your drawing for a product-specific review.
Through-hole (solder tail), SMT (flat base), press-fit (knurled barrel), right-angle, and threaded barrel configurations.
Ultra-miniature spring loaded contact pins for smartwatch cradles (Ø0.5–1.5mm), fitness tracker charging, TWS earphone cases, and smart ring contacts (Ø0.3–0.5mm).
Single-cell battery contact pins (AA/AAA/18650/coin cell), Li-ion battery pack contact arrays, and high-current EV/e-bike battery contacts (5–50A).
ICT and functional test spring contacts with crown, spear, flat, and concave tip geometries for HASL, ENIG, OSP, and conformal-coated PCB contact.
High-current industrial power spring contacts (10–100A), high-temperature spring contacts with Inconel springs and PEEK barrels (to 260°C), IP67/IP68/IP69K waterproof sealed spring contacts, AGV charging docking contacts, and vibration-resistant spring contacts for harsh industrial environments.
Biocompatible spring loaded contact pins — platinum-iridium, MP35N, titanium — for implantable medical device connectors (IS-1, DF-1, MRI-safe) with ISO 10993 compliance.
Spring loaded contact pins support charging, signal transfer and test interfaces across these six industries. Match contact geometry, working travel, force and plating to your application.
Spring loaded contact pins for wearable charging cradles, earphone charging cases, tablet docks and portable device power and data interfaces. Specify contact pitch, working travel and plating for your assembly.
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Spring loaded contacts for medical equipment charging, diagnostic instruments and detachable device accessories. Review contact force, material, plating and cleaning requirements against the intended operating environment.
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Spring loaded contacts for robot tool changer interfaces, end effectors and AGV charging docks. Confirm working travel, mating alignment, contact force and current requirements for repeated docking cycles.
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Spring loaded contact pins for battery test interfaces, vehicle electronics and removable module connections. Specify current, contact force, vibration conditions and plating requirements for the intended assembly.
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Precision spring contacts for avionics test fixtures, removable instrument interfaces and aerospace equipment connections. Review tip geometry, working travel, material traceability and inspection requirements against your drawing.
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Spring loaded contact pins for in-circuit testing, functional test fixtures and semiconductor test interfaces. Match tip geometry, contact pitch, spring force and plating to the device and required test cycles.
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Confirm the exact grade, delivery condition and finish compatibility with your drawing.
Highest-strength copper alloy · Excellent spring-back · Good conductivity · High-cycle ICT probes, high-reliability wearable contacts, aerospace spring contacts — 1,000,000+ cycle life
High conductivity BeCu · Good spring properties · High-conductivity power spring contact plungers requiring lower electrical resistance in the current path
Excellent machinability · Good conductivity · C3604: high-volume consumer electronics, ICT barrels · C2600: high ductility for crimp barrel deformation operations
Good spring properties · Excellent corrosion resistance · Moderate-cycle spring contacts, corrosion-resistant applications in marine and food processing environments
Highest conductivity · Excellent ductility · High-current battery contact plungers, EV charging spring contacts — minimum contact resistance at 5–100A current densities
Good corrosion resistance · Non-magnetic · Corrosion-resistant barrel bodies for food, marine, and harsh chemical environment spring contact applications
High strength · Good corrosion resistance · High-load spring contact structural components and high-retention-force barrel bodies in demanding mechanical environments
MP35N: high strength, biocompatible · Pt-Ir: biocompatible, high hardness · Ti: lightweight, non-magnetic · Implantable medical device spring contacts, medical wearable contacts
Finish selection
Select the finish around the specified material, functional surfaces and service conditions. Confirm process details and acceptance requirements with your drawing.
Industry standard for high-reliability spring loaded electrical contact pin plunger tips and barrel external contact surfaces.
Gold plating applied only to plunger tip contact zone and barrel external contact zone, with nickel or tin on non-contact surfaces.
Ultra-hard rhodium (HV 800–1000) for spring loaded contact pins in the highest-cycle applications exceeding one million compression cycles — ICT test fixtures and high-frequency production test spring contacts.
Review silver plating against the material, functional surfaces and intended service conditions.
Cost-effective wear-resistant plating for spring loaded electrical contact pins requiring better cycle life than gold at lower precious metal cost than rhodium.
Matte tin (preferred over bright tin — minimal tin whisker risk) for standard-reliability barrel and solder tail surfaces with excellent solderability for PCB through-hole and SMT mounting.
Machining resources for drawing review, prototypes and repeat-production programs.
Inspection & documentation
Review material identity, machining datums, functional dimensions and production records for your component.
Final tolerances, inspection coverage and acceptance criteria are confirmed against your drawing, material and geometry.
Confirm the certificates, inspection reports and production records needed for your order when sharing your drawing.
The product range includes Standard Pogo Pin Spring Contacts, Wearable Device Charging Contact Pins, Battery Contact Spring Pins. Custom geometry is reviewed against the approved drawing.
Material options include C17200 AT, C17500, C3604 / C2600. The exact grade and condition should be confirmed for your application.
Define contact geometry, mating diameters and plating allowance, together with datums, tolerances and required surface condition.
Finishing options include hard gold, selective gold plating, rhodium plating. Applicability is reviewed against the specified material and geometry.
Pricing and delivery are confirmed after reviewing the drawing, material availability, quantity, machining route, finishing and inspection scope.
CUSTOM CNC PARTS
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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