The HB Series motor is the leader in its class, offering high effeciency and durability. The three-zone orbiting valve, laminated manifold and ROLLER STATOR design work harmoniously to produce high overall effiencies over a wide range of operating conditions The standard case drain increases shaft seal life by reducing internal pressure experienced by the shaft seal. At the heart of the motor is a heavy-duty drive link, offering 30% more torque capacity than competitive designs.