Brush Maintenance & Inspection of Universal Motors 2019-04-16

This tutorial covers basic brush maintenance and inspection for the universal-type AC motors typically found in hand-held and portable power tools. Basic motor anatomy and commutator inspection is also covered. This document includes extensive photos of actual universal motors for reference. This tutorial has been compiled from forum postings by Ethan Poole (ehpoole) and Bob Vaughan (bob vaughan). [Posted October 5, 2010]