At the same time, press on the brush to increase pressure.
. Brush Seater, 8 in X 3 in X 2 in, Grade Mh For cleaning commutator pick a stone about 3/4 the length of the commutator bar and as thick as will neatly fit between the brushing rigs. Brush Seaters are used to easily and accurately seat commutator and slip ring brushes of any material. Our Brush Seaters come in 5 grades: ES EX tra Soft, FH Fine Hard, MS Medium Soft-our most popular, FS Fine Soft, and MH Medium Hard.