Resin Bonded Carbon Graphite offer cleaning action for use at slow speeds, low current densities and medium to low voltages. These grades were developed early in the history of motors and generators and are therefore found most often on older equipment, particularly with flush mica commutators. Grade Detail & its application

Natural Graphite is for use in special applications requiring the low friction characteristics of this material. When brushes must operate at very low current densities or very high peripheral speeds, a graphite grade should be used. Grade Detail & its application

Electro Graphite is the most common grades used on modern equipment with good performance at high voltages, high current densities and high speeds. There is a wide range of characteristics within this category. Most electro graphite grades are capable of handling overloads well. Grade Detail & its application

Copper Graphite has material contents of 15–95% copper or copper alloy. The added conductivity and lower voltage drop of the metals allows metal graphite brushes to perform well at very high current densities and low voltages. Grade Detail & its application

Silver Graphite has material contents of 15–95% silver. The added conductivity and lower voltage drop of the metals allows metal graphite brushes to perform well at very high current densities and low voltages. Grade Detail & its application

Style of carbon Brush (identification form)
The configuration of the carbon along with the method and location of the shunt connection determines the brush style. Due to the difficulty in describing the many different styles, refer to the style numbers located under each photograph.