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Explore our core selection of precision-machined contact pins, copper cylindrical heads, custom rivets, and switch shafts tailored for mission-critical low-voltage electrical distribution and protection devices.
High-precision turned rivets engineered from cold-heading brass and electrolytic copper, offering high shear strength and anti-vibration fastening in low-voltage circuit breakers.
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Ultra-low electrical resistance turned copper heads optimized for DC fast charging couplers and AC low-voltage wallbox electrical distribution modules.
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Micro-turned rotary shafts and magnetic plunger cores designed for industrial solenoid actuators, molded case circuit breakers (MCCBs), and automated transfer switches.
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Precision multi-axis Swiss-turned cores with specialized anti-corrosion plating, ensuring seamless electromagnetic flux transmission and zero magnetic hysteresis.
View Specifications →A comprehensive examination of design methodologies, metallurgy, micro-tolerances, and the transition toward smart, electrified, and digitized energy distribution networks.
Low-voltage electrical equipment—operating typically under 1,000V AC or 1,500V DC—constitutes the foundational infrastructure of global industrial power grids, modern residential buildings, commercial automation, and rapid-transit systems. Within this multi-tiered architecture, precision metal turned parts function as the primary conduits of continuous electrical current, mechanical actuation, structural fastening, and thermal dissipation. While macroscopic devices like Miniature Circuit Breakers (MCB), Molded Case Circuit Breakers (MCCB), Residual Current Devices (RCD), contactors, relays, and smart meters dominate high-level system schematics, their operating efficiency, electrical life cycles, and safety metrics depend entirely on micro-turned components such as contact pins, terminal studs, pivot rivets, core shafts, busbar coupling screws, and armature housings.
The global transition toward decentralized renewable energy generation (photovoltaic inverters, wind turbine control cabinets), energy storage systems (BESS), and electric vehicle (EV) charging infrastructures has imposed unprecedented operational stresses upon low-voltage hardware. Modern equipment must routinely withstand aggressive thermal cycling, persistent inductive load switching arcs, rapid short-circuit mechanical shocks, and harsh environmental corrosive agents. Consequently, standardized sheet metal stamping or loose-tolerance cold forming is increasingly superseded by high-precision CNC Swiss turning and multi-spindle automatic turning. These state-of-the-art subtractive manufacturing methodologies guarantee sub-micron concentricity, flawless surface roughness (Ra < 0.2 µm), and tightly controlled metallurgical integrity required by tier-one electrical switchgear manufacturers worldwide.
Machined from premium C11000 electrolytic tough pitch (ETP) and C10200 oxygen-free copper, achieving ≥ 100% IACS conductivity to minimize Joule heating and contact resistance under continuous full-load ratings.
Employing multi-axis CNC Swiss-type sliding headstock lathes capable of maintaining tight tolerances within ±0.003 mm, ensuring precise mechanical interlocking inside miniature switchgear housings.
Comprehensive electroplating solutions including pure silver (Ag), selective gold (Au), bright tin (Sn), and nickel (Ni) undercoats for exceptional arc erosion resistance and 96+ hours salt spray longevity.
Selecting appropriate alloys for metal turned parts in low-voltage electrical apparatus requires balancing contradictory physical properties: high thermal and electrical conductivity against mechanical hardness, yield strength, machinability, wear resistance, and cost efficiency. At Zhejiang Jifeilong Instrument Technology Co., LTD., our engineering team utilizes an extensive portfolio of certified raw materials:
| Material Designation | Typical Alloy Grades | Electrical Conductivity (% IACS) | Tensile Strength (MPa) | Primary Application in Low-Voltage Systems |
|---|---|---|---|---|
| High-Purity Copper | C11000 (ETP), C10200 (OFHC) | 100% – 101% | 220 – 380 | EV charging pile contact pins, main terminal lugs, high-current breaker bridge blocks. |
| Free-Cutting Brass | CW614N, CW617N, C36000, HPb59-1 | 25% – 28% | 380 – 540 | MCB terminal screws, neutral link studs, sensor connector pins, meter current clamps. |
| Tellurium & Beryllium Copper | C14500 (Te-Cu), C17200 (Be-Cu) | 85% – 93% (Te), 22% – 28% (Be) | 350 – 1250 | High-insertion spring contacts, quick-break relay dynamic contacts, heavy-duty switch sockets. |
| Austenitic Stainless Steel | AISI 303, AISI 304, AISI 316L | 2% – 3% | 520 – 750 | Non-magnetic armature shafts, outdoor breaker fasteners, corrosive-resistant solenoid sleeves. |
| Soft Magnetic Iron / Steel | DT4C, 12L14, AISI 1215 | 9% – 12% | 390 – 510 | Electromagnetic release plungers, solenoid valve armatures, trip mechanism yoke pins. |
Engineering Note: For high-current switching devices, contact resistance ($R_c$) is inversely proportional to contact pressure and micro-hardness. We specialize in precision micro-turning of Tellurium Copper (C14500), which delivers the rapid machinability of brass while preserving over 90% IACS conductivity, eliminating local thermal hot spots in continuous-duty contactors.
The operational versatility of metal turned parts is demonstrated across multiple critical application domains:
Within modular circuit breakers, turned rivets and pivot pins serve as the mechanical skeleton of the toggle and trip latch mechanisms. These components must withstand thousands of rapid mechanical open/close operations without dimensional distortion. Simultaneously, micro-turned terminal screws and collar sleeves clamp incoming supply cables, requiring high torsional strength (up to 3.5 N·m torque resistance) to avoid stripping or cross-threading during on-site electrical installation.
Smart prepaid electricity meters and smart grid reclosers rely on bistable latching relays and solenoid valve cores to connect or disconnect electrical services remotely. Turned soft-iron cores require impeccable magnetic permeability, near-zero coercive force, and ultra-smooth cylindrical surfaces to prevent sticking in the solenoid bobbin over millions of duty cycles.
Electric vehicle supply equipment (EVSE) handles severe power throughput at 400V–800V DC and 230V–400V AC. High-current male and female turned contact pins utilize multi-stage turned profiling with internal spring crowns. Our turned copper cylindrical head parts feature precision silver-plated mating interfaces that guarantee insertion forces below 100 N while maintaining contact resistance below 0.05 mΩ across 10,000+ mating cycles.
Three-phase AC contactors in industrial motor control centers subject their internal turned guides and contact studs to constant 50/60 Hz electromagnetic vibration and thermal expansion. Precision CNC turned components provide tight concentricity and dimensional stability up to 150°C, preventing contact chatter, phase imbalance, and catastrophic switchgear burnout.
As the electrical industry embraces Industry 4.0 smart manufacturing and decarbonization, several transformative trends are actively redefining the metal turned parts landscape for low-voltage systems:
Zhejiang Jifeilong Instrument Technology Co., LTD. (formerly Yueqing Feilong Instrument Factory) was established in September 1999 and is located at the Oujiang Port in Wenzhou City. It has complete production, processing, grinding and other departments. We mainly engage in the integrated manufacturing and sales of various electrical switches, shafts, plastic products, and hardware components.
Our products are widely used in home appliances, solenoid valves, electronics, automobiles, filtration equipment and other fields. By implementing strict quality control in every production link, from raw material procurement to finished product delivery, the company has passed the ISO9001 certification. The company constantly carries out system innovation, technological innovation and management innovation, and attaches great importance to introducing advanced manufacturing technologies and advanced production equipment in the industry.
Through technological and equipment transformation, it has now achieved fully automated production capacity. And with strict management, high-quality products and excellent services, it has won the trust and support of over 100 enterprise customers in China. This has enabled Zhejiang Jifeilong Instrument Technology Co., Ltd. to establish a good reputation in the market. The company adheres to the unchanging tenet of "seeking truth from facts and quality first", strictly implements the latest national and international quality standards, upholds the enterprise spirit of "quality first, reputation supreme, people-oriented, and quality as the root", gradually expands from the domestic market to the international market, and strives to become a high-quality global supplier of components. Devote our light and heat to building a beautiful cause and forge ahead forever to create a monument of modern instrument technology industry!
Driving excellence in precision metal turning through unyielding integrity, technical mastery, and long-term global client partnerships.
Operate with integrity and achieve multi-party win-win outcomes across the global electrical manufacturing ecosystem.
Be realistic and prioritize quality first in every turned shaft, pin, rivet, and electrical component we produce.
Reputation supreme, people-oriented, and uncompromising product quality established as our enterprise root.
Strive to continuously innovate and become a premier, trusted high-quality global supplier of precision components.
Stringent adherence to international quality management protocols, material safety standards, and defect-free manufacturing assurance.
Empowering leading manufacturers with custom-turned high-precision hardware, shafts, pins, and electrical terminal solutions.
Discover our complete line of CNC turned parts, micro shafts, contact rivets, nozzles, and specialized hardware components custom manufactured to exacting client specifications.
Precision fasteners and pivot shafts engineered for zero-slack assembly inside miniature circuit breaker trip units.
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Heavy-duty copper contact terminals featuring ultra-low insertion resistance and silver-plated contact faces.
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Stainless steel and carbon steel micro-shafts polished to mirror Ra 0.2 surface finish for electric switches and relays.
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Magnetic stainless and soft-iron cores turned to ±0.003mm tolerances for rapid response solenoid control valves.
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High-voltage and low-voltage harness connector pins with precision knurling, chamfering, and gold/tin plating.
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Micro-drilled brass and stainless nozzles with ultra-fine internal bores designed for filtration and fluid dispensing.
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High-torque thread rolled and turned brass binding posts for smart meters, fuse bases, and DIN-rail terminals.
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OEM/ODM turned and milled complex parts configured for specific industrial automation and switchgear enclosures.
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