Mersen is the preferred supplier of electrical motor manufacturers. For asynchronous motors with wound rotor, we offer a wide range of brush-holders (metric and imperial systems) as well as dedicated services (refurbishing, re-design, brush-holders replacement, components replacement). Robust Molded or machined Pressure systems (wound or coil springs) Single or multiple box Insulating studs Brush-holder attachment arm Brush-holder and rocker ring