I. Product Overview

The factory, with over two decades of experience in CNC precision machining, uses CNC heart-cutting machines to process brass connecting rods as a whole. The entire product is formed from a solid copper rod in a single cutting operation, with no splicing or welding assembly throughout the process. All steps, chamfers, and limit ring structures on the shaft are simultaneously processed, ensuring excellent concentricity and stringent, stable dimensional accuracy.
Crafted from selected high-quality brass materials, offering excellent conductivity and heat dissipation, anti-corrosion and resistance to rust; workpiece surface is smooth with no burrs, ensuring seamless insertion and removal without jamming. Customizable in material, dimensions, and head structure, paired with various anti-corrosion and conductive surface treatments, widely used in various electrical precision components. Capable of handling small batch prototyping and large-scale continuous supply.

Part Two: Highlights of Workmanship

1. Integrated material, one-piece molding, stable structure
   Full CNC lathe automatic cutting process, a solid copper rod is directly machined into a complete stepped shaft, without any segmented joints or gaps, ensuring no loosening or misalignment after assembly, and offering enhanced durability through repeated insertion and removal.
2. High precision tolerance control
   Outer diameter, length, and step thickness dimensions are unified, with minimal processing errors, perfectly fitting the assembly requirements of precision equipment cavities, good interchangeability, and convenient and efficient mass assembly.
3. Smooth surface, free of burrs
   After processing, the fine deburring treatment ensures smooth and glossy inner walls, outer rounds, and end faces. It will not scratch the plug holes or plastic accessories during use, and the insertion and removal process is smooth without any hindrance.
4. Copper base material has stable properties.
   The national standard brass material has a dense texture, excellent electrical conductivity, is not prone to oxidation and discoloration in daily environments, and maintains stable conductivity over long-term use.

Section 3: Optional Customizable Materials

• H59/H62 Brass: Standard general model, easy to machine, high cost-performance, preferred for electronic conductive parts
• Phosphor bronze: Excellent elasticity, withstands frequent plugging and unplugging, dedicated for conductive contacts.
• Copper Alloy: Optimal conductivity, suitable for high-power conductive accessories in new energy fields.
• Aluminum alloy: lightweight, lower cost, non-conductive positioning connectors
• Steel / Stainless Steel: High strength, wear-resistant, for mechanical locating pin shaft applications

4. Optional Surface Treatment Processes

1. Copper polishing: Retains brass color, offers optimal conductivity.
2. Nickel Plating: Enhances rust and oxidation resistance, suitable for use in humid environments.
3. Tin-plating: Facilitates welding of circuit lines, commonly used process for electronic components.
4. Gold Plating: Extremely low impedance, corrosion and wear resistance, specially used for high-end medical equipment and precision instruments.
5. Galvanized: Economical anti-rust solution, choose for mechanical structural fasteners

V. Applicable Application Scenarios

Electronic connector conductive pins, automotive electrical accessories, new energy storage and charging pile conductive terminals, medical precision testing instruments, industrial control sensor connecting shafts, pneumatic quick connector rods, home appliance power plug connectors, and various precision conductive and positioning connectors.

6. Core Product Advantages

1. Self-owned CNC machining equipment, ample production capacity, stable delivery for large orders
2. Integrated seamless structure, non-loosening, stable conductivity, longer service life
3. Size, shape, material, and surface treatment can all be customized as required.
4. Adaptable to various industrial conditions, it meets requirements for conductivity, wear resistance, and corrosion resistance.
5. Produced in compliance with ISO9001 quality system, full-size inspection upon shipment, guaranteed quality.

Chapter 7: Common Procurement Q&A

Q1: Can we replicate the processing according to the drawing or sample?
A: Sure, we can support mold making and sample production based on customer's CAD drawings or physical samples. Small batch trial orders can be given priority in production.
Q2: How long does it take to produce samples and bulk orders? What is the minimum order quantity requirement?
Sample cycle: 3-5 days; standard bulk order production cycle: 7-12 days, flexible MOQ, small batch customization is also available, urgent orders can negotiate to shorten delivery time.
Q3: What is the maximum processing accuracy achievable?
A: Standard outer diameter tolerance up to ±0.01mm, length tolerance ±0.02mm, meeting the requirements of the majority of precision electronics and instrument assembly.
Q4: Can we process heads with pointed, flat, or slotted structures?
A: Supports integrated turning processing for various non-standard structures such as flat heads, round arc heads, pointed heads, milled flats, radial slots, and face drilling.
Q5: Which process is most suitable for outdoor humid environments?
A: Recommend brass substrate with nickel or gold plating treatment, offering excellent rust and oxidation resistance; long-term use in humid environments is less prone to oxidation and conductivity degradation.