Rock drill bit lubricant circulating system

摘要: The present invention provides a lubricant circulation system for rock drill bit which circulates flow of over the bearing surfaces to keep bearings optimally lubricated and free particulate contaminants from drilling process. A pumping assembly, including pair nested gerotor pump elements is attached either cutting element or support structures so that one gerotors driven by rotation related other rotates freely. have corresponding tooth recess configuration pulls supply under positive pressure into variable sized cavity formed as rotate relative each then forces surfaces. Lubricant may optionally be pumped back with continued out journal area cuttings return surface.