electrographitic brushes motor / for DC motors

Mersen offers a wide range of electrographitic brushes, particularly adapted to DC motors (of which globally renowned EG8220 or EG34D grades).

Electrographitic grades are prepared from carbon powders and coke; they are then subjected to high temperature thermal treatments (> 2500 ?C) to transform the basic amorphous carbon into artificial graphite.

- Medium contact drop
- Low to medium friction coefficient
- Low electrical loss
particularly suited to high peripheral speeds (? 50 m/s or 154 ft/s)

- High strength
- Low resistance material
particularly resistant to high temperatures.

Current density in the brushes:
8 to 12 A/cm2 (50 to 75 A/in?) under steady conditions
20 to 25 A/cm2 (130 to 160 A/in?) for peak loads