Chain conveyor link

A linkage for moving material in a direction from a first end of a conveyor toward a second end of the conveyor, the linkage comprising:

• a link including a first surface and a second surface opposite the first surface, the second surface configured to slide relative to a support surface of the conveyor as the linkage moves from the first end of the conveyor toward the second end of the conveyor, at least one of the first surface and the second surface including a wear indicator representing a surface wear condition of the at least one of the first surface and second surface;
• wherein the wear indicator includes an aperture having a bottom recessed surface, the bottom recessed surface oriented at an oblique angle relative to the one of the first surface and the second surface, the bottom recessed surface having a first depth adjacent a first side of the aperture and a second depth adjacent a second side of the aperture opposite the first side, the second depth greater than the first depth, the aperture incrementally becoming less visible as the one of the first surface and the second surface is worn.