Custom CNC Machined Automotive Limiting Posts with ±0.001mm Precision

Material: High-conductivity stainless steel (SUS304 / 316L) or copper alloy (phosphor bronze), with optional nickel or tin plating for enhanced electrical performance

Shape: Precision cylindrical form with stepped geometry or internal threading for secure positioning and assembly

Size Range: Diameter: Φ5–Φ25 mm; Height: 10–40 mm, fully customizable to fit specific relay designs

Internal Design: Machined bore or threaded interface, ensuring accurate pin alignment and reliable mechanical connection

Surface Finish: Polished and plated surface to reduce contact resistance, improve conductivity, and prevent oxidation

Precision-Machined Reliability for Automotive Relays

At CAIYI, we specialize in manufacturing the high-precision relay limit post, a critical component for stable power distribution in modern vehicles. We understand that in automotive electronics, even a micron-level deviation can lead to signal instability. Our CNC customization service focuses on delivering parts that maintain perfect geometry under the most demanding mechanical and electrical stresses.

Core Performance Features:

Micron-Level Precision Fit: We engineer every limit post to guarantee accurate positioning. This ensures perfect alignment during continuous high-frequency switching, eliminating the risk of performance fluctuation.
Superior Electrical Contact Stability: Our design supports consistent electrical connections. By optimizing the surface finish, we drastically reduce the risk of signal loss and contact resistance, even in oxidation-prone environments.
Exceptional Environmental Resistance: Automotive systems face extreme heat and constant vibration. Our limit posts are manufactured from high-grade alloys that resist thermal expansion and oxidation, ensuring stable operation from the engine bay to the cabin.
Optimized Friction Reduction: Through precision surface grinding and interface optimization, we minimize mechanical wear. This leads to smoother operation, reduced energy loss, and a significantly extended service life for the entire relay assembly.

Customization & CNC Excellence:

High-Volume Consistency: We utilize automated CNC centers to ensure every single unit in a high-volume batch is identical, meeting strict Six Sigma quality standards.
Material Versatility: Depending on your conductivity and strength requirements, we offer machining in brass, copper, stainless steel, and specialized conductive alloys.
Turnkey Engineering Support: Our team provides DFM (Design for Manufacturing) feedback to help you optimize part geometry for better cost-efficiency and performance.

Technical Specifications:

Process: High-Speed CNC Turning & Milling
Tolerance: Up to $\pm 0.005\text{mm}$
Material: Brass, Copper, Stainless Steel (Optional Plating)
Surface Treatment: Passivation, Nickel/Silver Plating, or Polishing
Application: Automotive Relays, Industrial Control Switches, Electrical Systems