The Motor Drive series are high-speed drill bits used for down hole power drilling tools. The bits integrate advanced cutting structures and gauge protection technology, reliable bearing system, and a hydraulic structure designed for high efficiency in high speed drilling applications. The combination of these advanced designs decrease the common problems of conventional bits in directional and horizontal drilling, such as cone shell erosion, premature bearing failure, and low ROP. MD series bits are the ideal choice for directional, horizontal and high temperature drilling.