Most people get confused when they hear about brushness motors because they don’t understand how drills function to begin with. When drills were first created, they came with a motor system that consisted of four different parts. These parts were the carbon brushes, magnets, armature, and the commutator. They all work together in order to create the drilling motion that helps the machine to operate.

Brushness motors get their name in that they don’t use the same parts as the traditional drill design. Instead they eliminate the commutator and, more noticeably, the carbon brushes. This helps them to work more efficiently than the traditional brushed drills and with less friction. However, to understand why this happens, you first need to understand how both drills work.