Asymmetrical radial bearing

A drilling apparatus for use in drilling a borehole, wherein the drilling apparatus has a primary axis, the drilling apparatus comprising:

• a housing;
• a shaft within the housing, wherein the shaft is rotatable relative to the housing, wherein the shaft has a shaft axis, and wherein the shaft axis is oblique to the primary axis so that the drilling apparatus has a bend;
• a bearing assembly for rotatably supporting the shaft within the housing, wherein the bearing assembly comprises one or more thrust bearings and radial bearings, and wherein at least one radial bearing comprises:
• a first radial bearing component defining a first radial bearing surface, wherein at least a portion of the first radial bearing surface is provided by a first radial bearing material;
• and
• a second radial bearing component fixedly connected with the housing and defining a second radial bearing surface, wherein a portion of the second radial bearing surface is provided by a second radial bearing material, wherein the second radial bearing material is a wear resistant material, wherein the first radial bearing component and the second radial bearing component interact to transmit the radial load between the first radial bearing component and the second radial bearing component at a radial load location on the second radial bearing component, wherein the second radial bearing material is provided as the portion of the second radial bearing surface such that the second radial bearing material is concentrated at the radial load location, and wherein the radial load location is defined by the bend in the drilling apparatus.