Phosphor Bronze Stamping Parts Wholesale

Phosphor Bronze Stamping Parts

-- Steady & Reliable Manufacturer --

Yuyao Hongli Optoelectronics Co., Ltd. is a premier source manufacturer of Phosphor Bronze Stamping Parts, producing high-precision spring contacts, electrical terminals, connector clips, and switch blades. Situated in Yuyao, Zhejiang, our modern 5,000-square-meter production facility houses high-speed progressive presses, reel-to-reel stamping systems, and automated optical sorting equipment. We process high-performance phosphor bronze alloys, including C5191, C5210, and C5100, valued for their outstanding fatigue resistance, superior spring elasticity, excellent electrical conductivity, and non-magnetic properties. Partner with Yuyao Hongli for custom precision tooling, continuous reel plating, and reliable high-volume OEM production.

MANUFACTURING CAPABILITIES

Equipment and process capabilities

From mold design to batch stamping, we cover production needs of different tonnages and precision levels.

  • 01

    Ultra-High-Speed Terminal & Spring Stamping

    Utilizing high-speed precision presses operating up to 600 strokes per minute, we stamp intricate phosphor bronze contact springs with zero burrs and precise pitch control.

  • 02

    High-Elasticity Spring Contact Forming

    Multi-stage progressive dies form spring-loaded contact clips and connector terminals with strict springback compensation and long-term elasticity retention.

  • 03

    Reel-to-Reel Continuous Stamping

    We produce mass quantities of phosphor bronze terminals on continuous carrier reels, optimizing parts for automated assembly and wire-crimping machines.

  • 04

    In-House Thermal Stress Relieving

    Controlled atmosphere heat-treatment ovens stress-relieve formed spring contacts, preventing long-term spring fatigue and ensuring stable contact pressure.

SPEC · Overview of Key Equipment Parameters

Equipment TypeTonnage / SpecificationMachinable MaterialTypical Processing Thickness
High-Speed Precision Press25T - 80T High-Speed Stamping PressC5191, C5210, C5100 Phosphor Bronze0.08mm - 1.5mm Bronze Strip
Progressive Stamping Press45T - 110T Precision Punching PressHigh-Spring Temper Bronze Alloys0.15mm - 2.5mm Strip Metal
Continuous Reel-to-Reel Plating LineMulti-Tank Selective ElectroplatingStamped Terminal StripsTin, Selective Gold, Silver Plating
High-Speed Vision Sorting Machine360-Degree Glass Disk Optical SorterStamped Contact Pins & Springs100% Automated Defect Sorting
QUALITY CONTROL

Full-process quality control system

From incoming material inspection to full outgoing inspection, key processes are equipped with inspection points to ensure batch consistency.

Spring Force & Fatigue Cycling Test

Verifying contact pressure retention and mechanical cycle life on spring contacts.

  • Micro-force gauges testing insertion and withdrawal forces on connector clips.
  • High-frequency mechanical fatigue testing to simulate over 100,000 mating cycles.
  • Elastic recovery and bend angle verification after repeated deflection.

Electrical Conductivity & Plating Inspection

Checking electrical performance and plating layer quality on precision contacts.

  • Electrical contact resistance measuring using micro-ohmmeters.
  • XRF thickness verification for selective gold, silver, tin, and nickel plating.
  • Solderability testing (ASTM B545) for PCB surface-mount terminals.

Sub-Micron Optical & Pitch Measurement

Guaranteeing exact micro-dimensions on high-density connector terminals.

  • High-magnification 2D optical measuring projectors checking pin pitch and gap tolerances.
  • Burr height optical inspection (verifying burr limits under 0.015mm).
  • 100% automated optical sorting for dimensional conformance.
SURFACE FINISHING

Surface treatment process

Depending on the usage environment and appearance requirements of the parts, we offer anti-corrosion, wear-resistant, or decorative surface treatment solutions.

Finishing ProcessApplicable MaterialPrimary FunctionTypical Application
Selective Gold PlatingC5191, C5210 Phosphor BronzeDelivers minimal contact resistance, zero oxidation, and maximum signal integrityHigh-frequency telecom connectors, micro-switches, sensor contacts
Matte / Bright Tin PlatingC5191 Phosphor BronzeProvides excellent solderability and economical corrosion protectionPCB surface-mount terminals, automotive fuse clips, relay terminals
Silver ElectroplatingHigh-Current Bronze ContactsEnsures superior electrical conductivity for high-amperage power transmissionPower relay blades, battery contacts, industrial switchgear contacts
Nickel Underplating BarrierAll Phosphor Bronze StampingsPrevents copper diffusion into top gold or tin plating layers, extending service lifeAutomotive connectors, smart meter terminals, spring clips
Note: The above is a standard process list. Specific film thickness, color, and salt spray resistance rating can be customized according to customer drawings.
APPLICATIONS

Main application areas

Our products are widely used in industries that require high structural strength and precision consistency.

Electrical Relays, Switches & Circuit Breakers

High-fatigue spring contact blades and terminals engineered for frequent electrical switching.

  • Power relay contact spring blades and stationary terminals
  • Miniature snap-action switch contacts and spring levers
  • Circuit breaker current paths and spring clips

Automotive Electronics & Sensor Connectors

Reliable phosphor bronze terminal pins designed to withstand high automotive vibration.

  • Automotive wire harness female connector terminals
  • Oxygen sensor and ECU connector spring pins
  • Automotive fuse box spring clips and relay sockets

Telecom, Computers & Smart Instruments

Precision micro-stampings for high-density signal transfer and battery contacts.

  • 5G base station signal contacts and board-to-board connectors
  • Smart electricity meter current shunt spring terminals
  • Consumer electronics battery spring clips and SIM card contacts
PRODUCTION / FACTORY ADVANTAGES

Factory production advantages

With its own factory and equipment, the company ensures stable delivery times and controllable costs.

20+ Years of Micro-Stamping Expertise

Yuyao Hongli offers extensive technical experience in stamping thin-gauge phosphor bronze spring contacts with ultra-tight tolerances.

Reel-to-Reel Stamping & Selective Plating

Our integrated production lines supply continuous terminal strips on reels, ready for automated crimping equipment.

100% Automated Optical Sorting & Quality Assurance

High-speed vision inspection machines ensure zero pitch defects and flawless spring contact geometry.

CUSTOM MANUFACTURING PROCESS

Customized production process

From receiving drawings to batch delivery, standardized processes ensure traceability at every stage.

  • 1. Print Review & Spring Mechanics Analysis

    Engineers evaluate spring force, mating cycles, electrical load, and grain direction to select the right bronze alloy and temper.

  • 2. Micro-Progressive Tooling Fabrication

    Our toolroom builds high-precision progressive dies using micro-grain carbide inserts to achieve sub-micron tooling accuracy.

  • 3. Trial Stamping, Spring Force & FAI Verification

    Trial parts undergo spring force testing, solderability checks, and 2D optical measurement for customer approval.

  • 4. High-Speed Production & Selective Reel Plating

    Automated high-speed presses stamp bronze coil stock continuously, feeding into selective gold/tin plating lines.

  • 5. Optical Inspection, Reel Winding & Export Shipping

    Finished strip terminals pass 100% optical inspection, are wound onto interleaf-protected reels, and boxed for shipment.

FAQ

Frequently Asked Questions

Here are some questions that clients often ask before cooperating with us.

Why is phosphor bronze preferred for electrical spring contacts?

Phosphor bronze (especially C5210/C5191) offers an exceptional combination of high fatigue strength, excellent spring elasticity, good electrical conductivity, and resistance to stress relaxation.

What phosphor bronze alloys do you process?

We commonly stamp C5191 (5% Sn), C5210 (8% Sn for maximum spring temper), and C5100 phosphor bronze strips.

Can you supply stamped contacts on continuous reels?

Yes. We specialize in reel-to-reel stamping and selective plating, delivering continuous terminal strips wrapped with protective paper interleaf.

What is the thinnest phosphor bronze strip you can stamp?

Our high-speed precision presses can stamp thin-gauge bronze strips starting from 0.08mm in thickness.

About Us
Yuyao Hongli Optoelectronics Co., Ltd.
Yuyao Hongli Optoelectronics Co., Ltd.
Yuyao Hongli Optoelectronics Co., Ltd. is a comprehensive enterprise with over 20 years of experience in the manufacturing industry. Located in the Yangming Science and Technology Industrial Park of Yuyao, Zhejiang Province, it enjoys convenient transportation and a solid industrial foundation. As a famous China Phosphor Bronze Stamping Parts Suppliers and Phosphor Bronze Stamping Parts Factory, founded in 2000, formerly known as Yuyao Hongli Optoelectronics Educational Instruments Co., Ltd., the company is wholly owned by a natural person, with Xie Gang as the legal representative. Its registered capital of 500,000 yuan has been fully paid up, and it has maintained its continued development through stable operations.
Relying on a 5,000-square-meter modern factory and multiple stamping workshops, the company has built a diversified product system. Its core businesses cover the manufacturing, processing and wholesale and retail of educational instruments, optical instruments, household electric heaters, small household appliances, auto parts, hardware and plastic products, etc. At the same time, it operates and acts as an agent for the import and export trade of goods and technologies, and its products are sold at home and abroad.
The company brings together industry management elites and senior engineers to form a mature R&D and management team. Adhering to the business philosophy of "integrity and pragmatism," it is committed to providing customers with high-quality products and comprehensive after-sales service. Leveraging its diversified portfolio, certification guarantees, and import/export advantages, the company actively expands cooperation both domestically and internationally, and is willing to establish long-term and stable trade partnerships with partners from all sectors, continuously striving forward in the wave of intelligent and high-end development in the manufacturing industry.
GET IN TOUCH

Send Us a Message​

X Facebook
Products News