射频同轴内导体是射频连接器信号传输链路中的核心导电元件，直接影响连接器的插入损耗、回波损耗及接触可靠性。昆山图达讯电子科技有限公司基于近三十年精密走心机加工经验，为客户提供从材料选型、工艺规划到表面处理的一站式射频内导体加工方案。

本产品采用磷青铜QSn6.5-0.1材质，具备优异的弹性恢复能力与抗应力松弛特性，确保射频连接器在反复插拔过程中维持稳定的接触正压力。基材经走心机精密纵切成型后，表面抛光至Ra0.4，再进行镀金处理，镀金层有效降低接触电阻并保障高频信号的低损耗传输，适用于SMA、SMB、BNC等标准射频连接器及5G基站同轴馈线组件。

图达讯拥有60余台进口走心机（西铁城Citizen、津上Tsugami、斯大Star），支持Φ1.0–Φ4.0mm范围内射频内导体的高效精密加工，日产能达50万件。全程执行IATF16949与ISO9001双体系管控，从原材料入库到成品出货实现全流程品质追溯。

关键参数

产品特点与走心机工艺优势

1. 磷青铜高弹性，接触可靠：QSn6.5-0.1磷青铜经冷拔后弹性模量高、屈服强度稳定，内导体在连接器配合中提供持续的接触正压力，确保低而稳定的接触电阻，满足MIL-DTL-39012等射频连接器标准对插拔寿命的要求。

    

2. 镀金层保障高频低损耗传输：镀金表面有效抑制接触面氧化，降低高频信号趋肤效应带来的传输损耗。镀金前基材表面抛光至Ra0.4，确保镀层均匀致密，在GHz级高频段仍保持优异的插入损耗表现。

    

3. 走心机纵切+导套支撑，Φ1mm细轴也能保证直线度：对于Φ1.0mm级别的小直径细长轴内导体，走心机主轴与导套协同支撑，刀具紧邻切削点加工，大幅降低径向切削力引起的让刀与振动，直线度可控制在0.01mm以内，满足射频连接器对同轴度的严苛要求。

    

4. ±0.003mm精密公差，适配自动化装配：全系采用IT5级公差管控，关键尺寸CPK≥1.33，确保内导体与连接器绝缘体、外导体之间的装配一致性，适配客户自动化产线高速插装需求。

    

5. 60余台进口设备，日产能50万件：西铁城、津上、斯大三品牌走心机集群化生产，支持多规格射频内导体同步排产，大批量订单交期可控，紧急订单可协调加急排产。

    

6. 双体系管控，全流程可追溯：执行IATF16949汽车行业质量管理标准与ISO9001体系，从来料检验、首件确认、过程巡检到出货全检，每批次产品均附检测报告，关键参数可追溯至机台与操作员。

    

典型应用

• 5G通信基站：5G基站AAU/RU单元同轴馈线系统中的射频连接器内导体，镀金层保障毫米波频段信号的稳定传输，磷青铜基材耐受户外高低温循环环境。
• 射频连接器（SMA/SMB/BNC） ：通用射频连接器内导体，走心机精密纵切保证与外导体的同轴度，满足连接器标准对VSWR与插入损耗的指标要求。
• 微波器件与测试组件：微波滤波器、功分器、定向耦合器等微波器件中的信号针与接触探针，小直径精密车削配合镀金表面，满足实验室级测试组件对信号完整性的高要求。
• 航空航天射频系统：机载/星载射频模块中的同轴连接器内导体，磷青铜材质兼顾轻量化与高弹性，走心机加工精度满足航空航天连接器对可靠性的极端要求。

公司实力与询盘引导

昆山图达讯电子科技有限公司始创于1998年，深耕精密走心机加工领域近三十年。公司拥有60余台西铁城、津上、斯大等品牌进口走心机，具备从Φ0.5至Φ32mm范围各类精密轴类、套类零件的加工能力，产品广泛应用于射频通信、医疗器械、汽车电子、航空航天等领域。

我们已通过IATF16949与ISO9001双体系认证，日产能50万件，具备从材料选型、工艺开发到表面处理的全链条交付能力。射频同轴内导体是我们的优势产品之一，欢迎来图来样询价，支持打样验证。

立即询盘

• 官网：www.tudasyn.com
• 邮箱：yty@tudasyn.com
• 电话：18913105795

English Version

SEO info for backend only:

 

• SEO Title (≤60 chars): RF Coaxial Inner Conductor – Swiss Screw Machining
• Keywords: RF coaxial inner conductor, phosphor bronze swiss machining, gold plated RF pin, SMA connector contact pin, 5G coaxial conductor, precision swiss turned parts
• Meta Description (≤160 chars): Tudasyn manufactures precision RF coaxial inner conductors from phosphor bronze QSn6.5 via Swiss screw machining. Gold plated, ±0.003mm tolerance, 500K pcs/day capacity. MOQ 1,000 pcs, samples available.

 

Product Overview

The RF coaxial inner conductor is the critical current-carrying element within a coaxial connector's signal transmission path. Its dimensional accuracy, surface finish, and material properties directly determine the connector's insertion loss, return loss, and contact reliability over mating cycles.

Kunshan Tudasyn Electronic Technology Co., Ltd. leverages nearly three decades of Swiss-type CNC machining expertise to deliver precision RF inner conductors engineered to your specifications. Our process integrates material selection, precision turning, surface finishing, and rigorous quality control into a streamlined manufacturing workflow.

This product is manufactured from phosphor bronze QSn6.5-0.1, selected for its excellent elastic recovery and resistance to stress relaxation — ensuring stable contact force throughout repeated mating cycles. After precision Swiss turning, the surface is polished to Ra0.4 prior to gold plating, which minimizes contact resistance and maintains low-loss signal transmission at GHz frequencies.

Key Specifications

Product Features & Swiss Machining Advantages

1. Phosphor Bronze for Reliable Contact Force: QSn6.5-0.1 phosphor bronze delivers high elastic modulus and consistent yield strength after cold drawing. The inner conductor maintains stable contact normal force throughout the connector's mating life, meeting mating cycle life requirements per standards such as MIL-DTL-39012.

    

2. Gold Plating for Low-Loss HF Transmission: The gold-plated surface prevents oxidation at the contact interface, minimizing transmission loss caused by skin effect at high frequencies. Polishing the substrate to Ra0.4 before plating ensures a uniform, dense gold layer that maintains excellent insertion loss performance well into the GHz range.

    

3. Guide Bush Support for Straightness on Φ1mm Slim Shafts: For small-diameter slender inner conductors at the Φ1.0mm level, Swiss-type machining provides guide bush support adjacent to the cutting point, dramatically reducing deflection and vibration from radial cutting forces. Straightness is held within 0.01mm, meeting the strict coaxiality demands of RF connectors.

    

4. ±0.003mm Tolerance for Automated Assembly: All critical dimensions are held to IT5 grade tolerance with Cpk ≥ 1.33, ensuring consistent fit between the inner conductor, dielectric insulator, and outer conductor — fully compatible with high-speed automated connector assembly lines.

    

5. 60+ Imported Machines, 500K Pcs/Day Capacity: Our production floor operates Citizen, Tsugami, and Star Swiss-type lathes in a clustered configuration, enabling simultaneous production runs across multiple RF conductor specifications. Large-volume orders are delivered on schedule, with expedited options available for urgent requirements.

    

6. Dual-Certified Quality System, Full Traceability: Operating under both IATF 16949 (automotive) and ISO 9001 quality management systems, we enforce incoming inspection, first-article approval, in-process patrol inspection, and final outgoing inspection. Every shipment is accompanied by inspection reports, with key parameters traceable to the specific machine and operator.

    

Typical Applications

• 5G Communication Base Stations: Inner conductors for coaxial feed systems in AAU/RU units. Gold plating ensures stable signal transmission at mmWave frequencies, while phosphor bronze withstands outdoor thermal cycling.
• RF Connectors (SMA/SMB/BNC) : Precision Swiss-turned inner conductors for standard RF connectors, ensuring coaxiality with the outer conductor and meeting VSWR and insertion loss specifications.
• Microwave Components & Test Assemblies: Signal pins and contact probes for filters, power dividers, and directional couplers. Small-diameter precision turning combined with gold-plated surfaces meets laboratory-grade signal integrity requirements.
• Aerospace RF Systems: Inner conductors for airborne and spaceborne coaxial connectors. Phosphor bronze offers an optimal balance of light weight and high elasticity, with machining precision meeting extreme aerospace reliability standards.

About Tudasyn & Inquiry

Founded in 1998 in Shenzhen, Kunshan Tudasyn Electronic Technology Co., Ltd. has devoted nearly 30 years to precision Swiss-type CNC machining. We operate 60+ imported Swiss lathes (Citizen, Tsugami, Star), capable of machining precision shaft and bushing components from Φ0.5 to Φ32mm across a wide range of materials including copper alloys, stainless steels, aluminum alloys, titanium, and engineering plastics.

We are certified to IATF 16949 and ISO 9001, with a daily production capacity of 500,000 pieces. RF coaxial inner conductors are among our core competencies. We welcome drawing- or sample-based inquiries and support prototyping for design validation.

Contact Us

• Website: www.tudasyn.com
• Email: yty@tudasyn.com
• Phone: +86-18913105795