Reliable Automotive Relay for Stable Power Switching

Material: High-conductivity stainless steel (e.g., SUS304/316L) or copper alloy (e.g., phosphor bronze), with nickel/tin plating

Shape: Cylindrical shape with internal threads or stepped interface

Size Range: Diameter: Φ8mm – Φ25mm; Height: 10mm – 40mm (customizable)

Internal Design: Precision-machined bore for pin insertion or threaded connection

Surface Finish: Polished + plated (to enhance conductivity and anti-oxidation)

Manufacturing Process: CNC turning + precision grinding + electrochemical polishing

An automotive relay for stable power control requires materials that stand up to constant current loads and harsh under-hood environments. Caiyi utilizes choice medical/automotive-grade materials, including SUS304/316L stainless steel and high-purity copper alloys (phosphor bronze). Combined with advanced nickel or tin plating, our components exhibit exceptional thermal stability and minimize contact resistance for zero-loss power switching.

Precision CNC Turning & Micro-Tolerance Machining

Engineered for Tier-1 automotive applications, our relay manufacturing process utilizes multi-axis CNC turning and precision grinding. Specifications include:

Dimensional Versatility: Standard diameters from Φ8mm to Φ25mm and heights from 10mm to 40mm, all 100% customizable.
Geometric Precision: Cylindrical profiles engineered with internal threads or a stepped interface to integrate seamlessly into complex relay housings.
Internal Bore Engineering: Precision-machined bores designed for secure plug pin insertion or rock-solid threaded connections.

Advanced Electrochemical Surface Optimization

To guarantee a defect-free operational lifespan, every relay core undergoes automated electrochemical polishing followed by high-adhesion electroplating. This process eliminates microscopic burrs, delivers a mirror-smooth finish, and provides an impermeable anti-oxidation barrier. Our finish isolates the core component from moisture, salt spray, and corrosive automotive fluids.

Strict TS16949 Standards & Customization Services

As an established IATF-compliant automotive CNC components manufacturer, Caiyi offers scalable contract manufacturing services for global OEM/ODM buyers:

Custom Threading & Profiling: Tailored internal and external threads according to your precise engineering CAD blueprints.
Bulk PPAP Documentation: Full traceability, material certifications, and micro-measurement reports provided for automotive audit compliance.
Flexible Production Scalability: Optimized manufacturing pipelines built to handle both low-volume prototyping and high-capacity production runs.