I. Product Overview

This stepped conductive copper shell is made by CNC turning from high-quality H62 brass rod, featuring an overall hollow through structure. The exterior is processed with multi-section annular limiting steps, and the differential tube diameters at both ends are designed for precise male and female head insertion. The hollow interior can accommodate internal conductive pins and insulating liners. The external steppedstepslimit the insertion travel, preventing over-insertion damage to internal components. The finished product is fully electroplated with gold, a densePrecious metalsplating layer that isolates air and moisture, preventing oxidation and blackening of the copper material. Long-term use maintains stable contact resistance, and after tens of thousands of insertions and extractions, it remains smooth and wear-resistant. It is an essential structural + conductive integrated jacket accessory for all types of precision connectors.

Available in a variety of conductive materials such as cupronickel and tin bronze, the inner diameter, total length, stepped arrangement, and single segment outer diameter can be replicated in accordance with customer drawings or physical samples in a 1:1 ratio; suitable for small batch trial fitting of socket gaps, and stable supply in large quantities, with coaxiality, bore size, and plating thickness inspected and controlled item by item before shipment.

Section 2: Core Highlights of Craftsmanship and Workmanship

1. Integrated turning and shaping on CNC centerless grinding machines, excellent concentricity.
   The cylinder, multi-step steps, and guide end heads are all finished in one cutting, without any joint gaps. The concentricity of the inner and outer circles is high, and the male and female mating insertion and extraction are smooth without jamming or misalignment.
2. Multi-level step positioning structure, precise and controllable assembly travel
   Segmented annular steps serve as the positioning reference, with unified insertion depth, high consistency in mass assembly, and effective protection of internal contacts from being crushed and damaged.
3. Hollow inner wall precision deburring, assembly without damaging contact parts
   Hollow cavity with full surface polishing and passivation treatment, free from sharp burrs. The process of inserting pins and insulators will not scratch the matching precision components.
4. Full-domain gold plating coating, triple advantages of conductive, wear-resistant and anti-rust
   The cylinder is fully covered with gold plating on both inside and outside, which not only ensures extremely low electrical conductivity loss, but also boasts resistance to wear from insertion and removal, as well as corrosion resistance and oxidation resistance in saltFog environments, allowing for long-term stable operation in humid conditions.

Section 3: Optional Customizable Raw Materials

1. H62 Brass (Recommended)
   Easy-to-machine, balanced conductivity, highest cost-performance ratio, the preferred material for general-purpose connector copper shells.
2. Brass
   Optimal conductivity, specifically designed for high-power, high-current power connectors.
3. Phosphor bronze
   Excellent resilience, suitable for minor elastic gripping and frequent insertion/extraction conditions.
4. Beryllium copper
   High hardness and wear resistance, suitable for high-frequency repeated mating of precision connectors.

4. Optional Surface Treatment Processes

• Overall thick gold plating (actual shot standard process): ultra-low contact resistance, wear-resistant and antioxidant, precision signal connector mainstream technology
• Gold plated locally: Only the plug-in contact surfaces are gold plated, saving production costs, suitable for standard power outlets.
• Bright Nickel Plating: Basic rust-proof and wear-resistant, indoor general electrical accessories
• Brass Natural: Internal structure sheath for equipment, no stringent anti-conductive and anti-rust requirements in operation

Chapter 5: Applicable Application Scenarios

✅ Various types of small signal cable connector with copper sleeve housing
✅ Low-voltage power plug and socket conductive protection sleeve
✅ Temperature and humidity, pressure sensor cable connector housing
✅ Precision terminal housing for portable medical equipment
✅ Laboratory testing instrument signal transmission connection copper shell

Six, Core Product Advantages

1. AllDimensions、Step structure、The aperture size can be adjusted as required in a non-standard manner.
2. Guide pin + Limit stop + Conductive protection three-in-one structure, simplifies the overall parts of the connector
3. Gold-plated coating completely resolves the copper oxidation issue, maintaining electrical performance without attenuation over long-term use.
4. Multiple material options and electroplating processes available, suitable for weak signal transmission to high current power supply in various scenarios.
5. Support for single piece R&D prototyping, ample capacity for CNC lathe mass production, stable and controllable delivery time

Section 7: Common Procurement Q&A

Q1: Can the tolerance of inner and outer hole diameters be tightened according to the precision connector standard?
A: Sure, we can control micron-level tolerances according to the customer's requirements for fit, ensuring the insertion and removal are appropriately tight.
Q2: For high-frequency weak signal transmission, what kind of surface treatment is recommended?
A: Selected with overall thickened gold plating technology, impedance is stable and will not cause signal attenuation interference.
Q3: Can it be made with one end sealed blind hole and grooved elastic clamping style?
Support, blind hole copper shell, open elastic jaw copper sleeve irregular structure can all be processed in one piece by turning.
Q4: Can the gold plating salt spray duration be customized?
A: Yes, adjust the gold plating thickness based on the customer's salt spray test criteria to meet corrosion resistance and durability requirements.