Applications / Busbar Connection

Belleville washers also called disc springs are essential in bus bar connections to maintain constant pressure, preventing loosening caused by thermal expansion or contraction.

When bolting aluminum lugs and connectors to bus bars with steel or brass hardware, adding Optimum Belleville washers to maintain a tight connection on top of a flat washer under the bolt head or nut.

Particularly in heavy-duty service where the heat rise is expected to exceed 30° C above ambient, Belleville washers provide constant pressure as the connector metals expand and contract with temperature changes.