Realization of Domestic Production of Brush for Shaft Grounding

The research group led by Jang Song Ok, laboratory head at the Faculty of Mining Engineering succeeded in manufacturing a natural graphite brush for shaft grounding and is trying to make further achievements in their research.

They proved scientifically that it is possible to make a brush for shaft grounding with natural graphite and decided the structure, quality and operation system of the material for the brush with high capacity of electro motion and contact property and with improved wear property.

The permissible current density of the brush is 20~30A/㎠, the ratio of wear is about 0.3㎜/1 000㎞ and the spring pressure is around 20㎪.