Meaning
Lateral friction occurs when an electrical pin slides against a socket surface during mating. This contact scrubbing force helps to remove oxidation and contaminants that accumulate on the metal plating. Reliable electrical continuity depends on this mechanical action to expose fresh, conductive material at the interface.
Surface Cleaning
Small amounts of debris can increase the electrical resistance of a connection to unacceptable levels. The movement generated by contact scrubbing force physically displaces these particles away from the primary signal path. High-speed data connectors rely on this mechanism to maintain signal integrity in harsh environments.
Plating Integrity
Excessive friction during the mating cycle can lead to the removal of the protective gold or tin layer. Designers must balance contact scrubbing force to ensure it is strong enough to clean but light enough to prevent premature wear. Wear through the plating exposes the base metal to corrosion, which eventually leads to intermittent failures.
Lubricants are sometimes applied to the pins to manage the friction without sacrificing the cleaning effect. Proper force levels extend life.
Connector Insertion
Total force required to join a multi-pin housing is the sum of these individual frictional events. If the contact scrubbing force is too high, the connector might be impossible to seat by hand.
