At the same time, press on the brush to increase pressure.
Brush Seater, 4-3/4 in X 3/4 in X 1/2 in, Grade Es 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.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 HardBrush Seaters are used to easily and accurately seat commutator and slip ring brushes of any material.