[Welcome to CPOC || North American Owned Manufacturers of Carbon Brushes North American owned manufacturers of carbon brushes, brush holders, constant force spring assemblies, mechanical carbons, quick disconnect terminals, mounts and sliding contacts. Our brushes and brush holders are used on large industrial motors; both commutator and slip ring, fractional horsepower motors, tachometers, synchronous motors and permanent magnetic motors. We service a wide range of industries including power generation, steel, mining, paper, motor repair, elevator, railroad, transit and OEM.]