Spring Test
Probes
CNCPioneer produces probe pins, spring-loaded assemblies, fixture contacts, IC socket pins, and custom micro-machined components for PCB, fixture, device, and board test. Swiss CNC turning controls miniature tips, plungers, and barrels in brass, copper alloys, stainless, tool steel, and more. Qualified features reach ±0.005mm diameter and ±0.010mm concentricity, with plating, low-burr finishing, clean packaging, and 24-hour quotes.
What Are
Spring Test Probes?
A spring test probe is a precision electrical contact between a pad, lead, bump, coupon, or device and a test instrument or fixture. It may be a fixed micro-pin, spring-loaded probe, socket contact, burn-in contact, or custom turned component. Tip profile, force, travel, pitch, and resistance must match the test interface.
Performance depends on tip geometry, diameter, straightness, hardness, force, stroke, contact resistance, wear, contamination, and alignment. CNCPioneer confirms the material, machining route, tip radius, plunger-barrel fit, plating, cleaning, inspection, and packaging before production.
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Probe DFM for tip, force, pitch, travel, and test surface We review pad size, tip radius, pitch, force, stroke, overtravel, current, signal level, wear, alignment, contamination risk, and replacement before selecting the machining route.
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Swiss CNC turning for miniature probe pins, plungers, and barrels Guide-bushing Swiss CNC supports small components with stable tip and barrel dimensions. CNC turning and MAZAK mill-turn centres produce larger contacts, sockets, fixture bodies, and threaded probes.
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Materials and plating for low resistance and stable contact Copper alloys, brass, phosphor bronze, stainless, tool steel, and nickel alloys are matched to conductivity, force, wear, hardness, corrosion, and finish requirements.
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24-hour quotes from a China precision factory Send a drawing or STEP file with pad data, tip profile, force, stroke, plating, test cycles, quantity, or annual usage. We return pricing within 24 hours and DFM in 48.
Why CNCPioneer for
Spring Test Probes?
Our Swiss CNC and mill-turn platform combines conductive-alloy expertise, micro-tip and barrel DFM, force control, selective finishing, and clean packaging for PCB, fixture, device, burn-in, socket, and production-test programmes. China production can provide a 40–60% cost advantage.
Probe Tip Geometry for Test Pad, Pad, Bump, and Device and Board Testing
Probes must make reliable contact without damaging the pad, bump, lead, or coupon. We review profile, radius, crown, chisel, flat, cup, point, contact area, pitch, alignment, force, travel, cleaning, and replacement around the actual test surface.
Plunger, Barrel, and Spring Test Probe Motion Control
Assemblies need a smooth plunger-barrel fit, stable spring seat, controlled stroke, and repeatable return. We review bore, plunger diameter, guide length, spring rate, working force, free length, travel, concentricity, wear, and fixture alignment. Qualified features can reach ±0.005mm diameter.
PCB and Fixture Test, Device and Board Test, Burn-In, and IC Socket Applications
Probes serve pad probing, device and board test, burn-in, IC sockets, memory and power-device test, handling, fixtures, and inspection. We review the interface, pitch, current, signal level, cycles, resistance, thermal conditions, fixture, replacement access, and cleanliness before defining the pin, barrel, plunger, and termination.
Material and Plating Matched to Conductivity and Wear
C14500 supports conductivity and machining; C17200 suits resilient contact interfaces; C36000 supports economical probes and barrels; phosphor bronze serves spring behaviour; stainless and tool steel suit guide or wear parts. Material and finish are matched to resistance, force, wear, hardness, corrosion, and cycles.
Gold, Nickel, and Clean Surface Support for Electronic Test
Gold suits low-level signals, nickel provides a barrier and wear layer, silver supports conductivity, and tin suits selected terminals. We review thickness, tip wear, resistance, masking, dimensional allowance, motion, particle control, cleaning, and packaging for each zone.
Spring Test Probes China Supply with Clean Packaging
Programmes can include material and plating certificates, dimensional reports, specified force, stroke, or resistance records, RoHS/REACH support, COC, PPAP Level 3, AS9102 FAIR, and lot traceability. Clean trays, tubes, sealed bags, compartment packs, and bar-coded labels protect probes and prevent mixed lots.
Spring Test Probes
Product Portfolio
We produce fixture pins, device-test probes, plungers, barrels, spring contacts, IC socket pins, burn-in contacts, PCB test pins, power-device probes, and custom machined components.
Fixture Test Probe Pins
Components for test pads, coupons, micro pads, bumps, and inspection fixtures. Point, crown, chisel, cup, ball, flat, and custom tips are controlled for radius, diameter, pitch, force, travel, alignment, wear, and cleaning. Brass, copper alloys, stainless, tool steel, and plated options are available.
Device Test Probe Pins
Probe pins and sockets for final device and board test, IC sockets, burn-in boards, memory test, power electronics, and device handlers. Plunger diameter, barrel bore, spring seat, interface, depth, force, pitch, retention, plating, and thermal conditions are controlled to the socket and device.
Electronic fixture probe pins
Components for PCB fixtures, device handlers, production inspection, continuity tests, burn-in equipment, and service tools. Threaded bodies, press-fit barrels, PCB tails, cable interfaces, guide sleeves, locating features, special tips, and replaceable modules are available. We review pad size, pitch, force, stroke, alignment, wear, cleanliness, and access.
Industries
We support OEM programmes that need repeatable electrical contact, controlled force, low resistance, high cycle life, clean handling, and traceable replacements.
Aerospace
Precision probe pins, spring contacts, guide pins, and contact components for avionics modules, control systems, communication equipment, navigation units, power distribution assemblies, and aerospace test fixtures. We review contact force, stroke, resistance, plating, vibration exposure, thermal conditions, cycle life, material traceability, replacement access, and clean packaging for demanding aerospace programmes.
Semiconductor
Probe pins, guide pins, spring contacts, fixture components, and sensor contacts for handlers, wafer probing equipment, test heads, alignment systems, burn-in fixtures, and production tools. Options include miniature geometry, corrosion-resistant materials, gold or nickel plating, low burrs, controlled force, stable resistance, and clean packaging.
Automotive
IATF 16949 probe pins and spring contacts for automotive electronics, battery management systems, power modules, inverters, sensors, controllers, wire harness testing, and EV charging test applications. Programmes can include PPAP Level 3, force and stroke checks, resistance records, plating certificates, bar-coded packaging, traceability, and scheduled delivery.
Materials
Materials for
Spring Test Probes
Our material platform covers brass, copper, tellurium copper, beryllium copper, phosphor bronze, stainless, tool steel, nickel alloys, and customer-specified materials. Selection considers tip wear, force, conductivity, resistance, hardness, corrosion, plating, cycles, and volume.
C36000 Free-Machining Brass
C36000 enables efficient production of probes, plungers, barrels, PCB contacts, and fixture components. It offers clean turning, stable dimensions, good conductivity, and economical plating. We review tip geometry, plunger-barrel fit, spring seat, force, finish, burr control, wear, and cycles before approval.
C11000 / C10200 Copper
C11000 or oxygen-free copper suits high-conductivity current paths and low resistance. We review machinability, tip and chip control, plunger contact, spring interface, finish, oxidation protection, heat, and storage. Parts can include solid or hollow tips, shoulders, barrels, and terminations.
C14500 Tellurium Copper
C14500 balances conductivity and machinability for probes, plungers, device contacts, and power-test interfaces. It supports complex small features with practical chip control; resistance, tip wear, plating, corrosion, heat, force, cycles, and stability are reviewed.
C17200 Beryllium Copper
C17200 suits resilient plungers, spring contacts, high-cycle probes, and test components that need strength with conductivity. We review heat treatment, machining sequence, hardness, force, plating, safety controls, and inspection before release.
Phosphor Bronze and Special Copper Alloys
Phosphor bronze and special copper alloys suit spring interfaces, socket components, resilient contacts, low-friction parts, and corrosion-sensitive test components. We review conductivity, force, hardness, wear, cycles, plating, cleanability, safety, and availability.
303 / 304 / 316L Stainless and Tool Steel
Stainless suits corrosion-resistant barrels, guide sleeves, fixture parts, and mechanical components; tool steel suits high-wear and high-cycle parts. 303 improves machinability, 304 suits general corrosion, and 316L suits demanding chemical or clean environments. Heat treatment, grinding, passivation, plating, and documentation are available.
Surface Treatments for
Spring Test Probes
Finishing is selected for resistance, tip wear, cycles, force, signal stability, current, corrosion, particle control, and clean handling. We review thickness, masking, dimensional allowance, movement, protection, cleaning, and post-finish inspection before production.
Gold Plating for Electronic Signal Probes
Gold suits low-level signal, pad, device, and fine-pitch probes that need stable contact and corrosion resistance. We review thickness, nickel underlayer, tip wear, force, cycles, selective plating, motion, contamination, and dimensional allowance.
Nickel Plating for Probe Barrel and Wear Protection
Nickel provides a barrier, corrosion protection, wear resistance, and a stable base for barrels, plungers, and mechanical zones. We review thickness, movement, resistance, spring seat, masking, dimensional growth, particle control, and post-plate inspection.
Tin Plating for Power and Low-Resistance Probes
Tin suits power-electronic pins, battery probes, solderable terminations, and selected low-resistance interfaces. We review thickness, wear, motion, masking, dimensional allowance, storage needs, and post-plate fit.
Silver Plating for High-Conductivity Probe Contacts
Silver suits high-conductivity probes, power-device testing, battery contacts, and specialised fixtures. We review thickness, resistance, wear, anti-tarnish protection, masking, motion, mating material, particle control, and packaging.
Low-Burr Deburring and Probe Cleaning
Probes need smooth tips, clean plungers, burr-free barrels, and unobstructed movement. Deburring, brushing, washing, specified ultrasonic cleaning, drying, and visual inspection protect tip edges, bores, spring seats, slots, and mounting features through packaging.
Laser Marking and Clean Electronic Packaging
Part numbers, force or lot codes, orientation marks, trays, tubes, sealed bags, or compartment packs can protect tips and prevent mixed lots. We review marking, readability, protection, particle control, traceability, and receiving labels for fixture and socket assembly.
DFM can cover gold, nickel, tin, silver, selective plating, masking, deburring, cleaning, marking, force or resistance records, post-plate dimensions, and clean packaging.
IATF 16949 & AS9100D Quality System for
Spring Test Probes
Our quality system controls four risks: tip, plunger, barrel, and material identity; force and stroke stability; plating and cleanliness; and traceable documentation. It supports test, burn-in, socket, medical, automotive, and industrial programmes.
Material, Tip, Spring, and Test-Surface DFM
Incoming brass, copper, stainless, tool steel, and special-alloy lots are checked against certificates and can receive alloy verification. DFM confirms the pad, tip profile, pitch, force, stroke, travel, spring seat, plating, cycles, current, signal, contamination risk, alignment, assembly sequence, and inspection plan before machining.
- Certificate review for C36000, C14500, C17200, phosphor bronze, stainless, tool steel, nickel alloys, and special materials
- Tip profile, pad or lead geometry, pitch, force, stroke, travel, spring seat, and cycles reviewed
- Plating, masking, contact-zone cleaning, allowance, and post-plate gauge plan defined
Swiss CNC and CNC Turning Tip / Barrel Control
Swiss CNC, CNC lathes, and MAZAK mill-turn centres are selected for diameter, tip size, length, material, spring interface, surface profile, quantity, and tolerance. Small components are supported close to the cutting zone; larger probes, threaded bodies, and fixture parts use stable datums. Targets can include ±0.005mm diameter and ±0.010mm concentricity.
- Swiss CNC for miniature fixture tips, device-test probes, plungers, and barrels
- CNC turning and MAZAK mill-turn for larger probes, fixture bodies, flanges, grooves, and threads
- Specified first-piece optical, CMM, pin-gauge, bore, stroke, and finish inspection
100% Critical Probe Geometry and Post-Plating Inspection
Probes are inspected for tip diameter and profile, barrel ID and OD, length, movement, shoulder, groove, spring seat, mounting thread, concentricity, burrs, and finish to the drawing. Specified plated parts receive post-plate review for thickness, tip area, appearance, dimensions, masking, movement, and fit. Force, stroke, resistance, cleanliness, particles, and packaging can be verified as required.
- 100% critical-dimension inspection for qualified programmes
- Specified post-plating diameter and contact-zone review
- Tip geometry, plunger movement, spring seat, burr, cleanliness, force, stroke, and finish checks included
Documentation — Dimensional Report, Force Record, Plating Cert, PPAP, and FAIR
Available documentation includes dimensional reports, material and plating certificates, alloy verification, specified force, stroke, or resistance records, finish readings, RoHS/REACH, COC, PPAP Level 3, and AS9102 FAIR. Lot traceability follows material, machining, plating, inspection, cleaning, and packaging records.
- Dimensional reports, tip or barrel records, certificates, and COC available
- PPAP Level 3 for automotive, EV, power-electronic, and high-volume fixture programmes
- AS9102 FAIR for aerospace, medical, electronic, and precision-equipment programmes
Spring Test Probes FAQ
Answers for buyers and engineers on probe geometry, structures, tip profiles, force, stroke, finishing, cleanliness, lead times, and quotes.
Send a 2D drawing or STEP file with probe function, pad geometry, tip profile, pitch, tip and barrel dimensions, material, force, stroke, spring specification, plating, resistance, cycles, quantity, and packaging. Without a drawing, we can review a sample or fixture photos with pad dimensions, test current, and expected volume.
Tip and force depend on pad or bump material, size, pitch, surface condition, acceptable marking, resistance, cycles, alignment, and available travel. Point or crown tips suit some oxide-breaking or small-pad applications, while flat, cup, ball, or chisel profiles suit other surfaces. We review geometry, working force, stroke, spring rate, fixture tolerance, and wear before approval.
C36000 brass suits machined plungers and barrels; C14500 and C11000 copper suit conductivity; C17200 and phosphor bronze suit resilient interfaces; stainless and tool steel suit guide, barrel, and wear parts. Gold suits low-level signals, nickel barrier and wear, silver conductivity, and tin selected power or solderable interfaces. The right combination depends on wear, force, resistance, cycles, cleanliness, and cost.
Simple turned components typically take 5–8 business days after drawing confirmation and material availability. Micro-tip, fine-pitch, spring-loaded, plated, force-tested, clean-packed, or documentation-heavy programmes commonly take 8–15. Volume lead time depends on material, CNC cycle, plating or spring supply, inspection, packaging, and quantity. Quotes arrive in 24 hours and DFM in 48.
Get a Quote for Spring Test Probes
Upload a drawing, 3D CAD model, pad or lead geometry, tip profile, force and stroke requirements, material and plating notes, test cycles, cleanliness target, quantity, or annual usage. Receive a quote within 24 hours and DFM feedback within 48.