A monitoring system for monitoring wear and usage along a portion of a wear surface for earth moving equipment includes a monitoring assembly to detect a characteristic pertaining to wear or usage in a wear part for excavating equipment and transmit the detected characteristic as information, wherein the monitoring assembly includes a bolt having a standard head, a coupling nut that captures the bolt on one end, a spacer secured to the top of the head, and a sensor probe having an elongate structure that passes through both the bolt and the coupling nut and is captured by the coupling nut on an opposite end. The monitoring assembly being wirelessly able to communicate to a remote device to monitor wear.

A bearing arrangement of a horizontal grinding mill with a drum includes a first bearing device and a second bearing device, the drum being supported in rotation by the first and second bearing devices. The bearing arrangement further includes a load determiner that determines a load applied on the first bearing device and fill rate determiner that determines a fill rate of the drum during normal operation of the horizontal grinding mill from a first relationship determined during a calibration period. The first relationship correlates the fill rate of the drum to the determined load applied on the first bearing device.