A metal-to-metal spherical bearing

摘要

A metal-to-metal bearing comprising a bearing housing (2) of a first material and a ball (3) of a second material held within the housing, the interface between the housing and the ball comprising two bearing surfaces, wherein one of the first and second materials is a titanium alloy having a diffusion zone (6) near its surface to which is adhered a coating (5) of titanium nitride to provide one of the bearing surfaces.