Metal Stamping Spring Contacts

The Metal Stamping Spring Contacts depend entirely on elastic deformation for their function. Stable springback performance is essential; insufficient elasticity will result in functional failure under operating conditions.

SUS301 full-hard (SH) stainless steel is commonly selected due to its excellent spring properties and suitability for precision forming. 65Mn spring steel is also used after quenching and tempering to achieve stable elastic recovery. For applications requiring electrical conductivity, C5191 phosphor bronze is applied, while beryllium copper is used for higher springback performance and improved fatigue resistance.

Material thickness ranges from 0.2 mm to 1.0 mm, with ultra-precision designs reaching down to 0.1 mm, comparable to paper thickness. Hardness is controlled between HV350 and HV550. Below this range, springback performance is insufficient; above it, risk of fracture increases. Hardness is adjusted through controlled tempering processes, depending on required elasticity and durability.

Fatigue testing is performed using in-house equipment. After 500,000 cycles, deformation remains below 0.02 mm. Extended testing up to 800,000 cycles shows deformation of approximately 0.025 mm, demonstrating stable long-term elastic performance under repeated loading conditions.

For conductive versions, a 5 μm nickel plating is applied, maintaining contact resistance below 50 mΩ. For applications requiring lower resistance, gold or silver plating can be used.

Each Metal Stamping Spring Contacts is designed with a tip radius of R0.2 to remove sharp edges and reduce the risk of damage to mating plastic components during assembly. This also helps reduce rejection rates caused by surface scratching.

Chamfer geometry and overall contact shape are fully customizable. Product types include clip contacts, conductive contacts, and limit contacts depending on application requirements.

The most critical challenge in spring contact manufacturing is dimensional variation after heat treatment. To address this, a precision sizing process is applied after heat treatment to ensure dimensional stability and functional consistency.

Standard sample lead time is 3–5 days, while complex structures require 5–10 days. Small batch production is supported, and technical feedback is typically responded to within 24 hours.