All major manufacturers of three-phase ac induction motors offer inverter-duty models with insulation sufficient to protect the windings, but the bearings are often left vulnerable to damage — ...

At Basin Electric’s Leland Olds Station, bearings on coal conveyors were scoring the shafts on which they were mounted because their set screws would not hold securely under the operating conditions.

Conveyors that elevate and pile beets in 32-ft tall heaps during harvest now use drivetrains with self-aligning planet carriers that float radially and axially to automatically align and balance ...