Products Description
We deliver high-performance Precision Cold Forming Contacts engineered for heavy-duty electrical switching applications. Utilizing advanced multi-station cold heading machinery, we forge solid silver alloy tips directly onto high-conductivity copper shanks, eliminating the need for secondary brazing and enhancing structural integrity.
As an experienced direct manufacturer, our engineering team supports complete OEM/ODM customization from raw material selection to progressive die design, automated riveting, and silver/nickel electroplating. These Customized Bimetallic Contacts ensure exceptional mechanical durability and stable thermal performance under high-frequency electrical make-and-break cycles.
Technical Specifications & Materials
| Technical Parameter | Specification Value |
| Contact Tip Material | AgSnO2 88/12, AgNi 10/90, AgCdO 15/85 |
| Shank Material | C1100 ETP Copper, Cu-ETP |
| Electrical Conductivity | ≥ 85% IACS (Copper Shank) |
| Shear Strength / Bonding Force | ≥ 150 MPa |
| Hardness | Tip: 80 - 110 HV / Shank: 60 - 90 HV |
| Contact Resistance | ≤ 0.5 mΩ |
| Dimensional Tolerance | ±0.005 mm |
| Plating Thickness | Silver Plating: 3 - 8 μm |
| Quality Management System | IATF 16949, ISO 9001, RoHS, REACH |
Quality Control & Testing Standards
Rigorous quality assurance protocols govern every batch of Silver Alloy Bimetal Contact Point leaving our production line. We utilize CMM optical measuring systems and profile projectors to verify micro-dimensions and concentricity. Metallographic microscope slicing checks the interfacial bonding line between the silver alloy tip and the copper shank, ensuring zero voids or delamination. Furthermore, salt spray chambers conduct NSS 96-hour corrosion testing, while spectrographs analyze raw material purity, ensuring full Material Test Report (MTR) traceability for every shipment.
Frequently Asked Questions
Why is cold heading preferred over brazing for bimetal silver contacts with copper shanks?
Cold heading applies high mechanical pressure to plastically deform the Button Bimetal Rivet Electrical Contact silver tip and copper shank into an inseparable metallurgical bond. This eliminates brazing alloy voids, reduces electrical resistance, and significantly lowers thermal stress during high-current operations.
How do you prevent oxidation on the copper shank after cold forming and cleaning?
Following cold forming and precision cleaning, all copper shanks of Bimetal Electric Rivet Contact undergo immediate passivation treatment and optional anti-tarnish electroplating. Parts are then vacuum-sealed in moisture-barrier bags with desiccants to prevent surface oxidation during transit.
What is the standard sample lead time and MOQ for custom precision cold forming contacts?
Standard custom prototypes of Silver Bimetal Rivet Contacts utilizing existing tooling require 7 to 10 days, while new progressive die development takes 12 to 15 days. Minimum order quantities are flexible to support initial engineering validation runs and full-scale manufacturing.
contact us
Send us your engineering drawings, material specifications, or Precision Cold Forming Contact sample requirements to receive a fast OEM quote and technical DFM analysis within 24 hours.
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