Book excerpt: New geometry of face worm gear drives with conical and cylindrical worms is proposed. The generation of the face worm-gear is based on application of a tilted head-cutter (grinding tool) instead of application of a hob applied at present. The generation of a conjugated worm is based on application of a tilted head-cutter (grinding tool) as well. The bearing contact of the gear drive is localized and is oriented longitudinally. A predesigned parabolic function of transmission errors for reduction of noise and vibration is provided. The stress analysis of the gear drive is performed using a three-dimensional finite element analysis. The contacting model is automatically generated. The developed theory is illustrated with numerical examples.Litvin, Faydor L. and Nava, Alessandro and Fan, Qi and Fuentes, AlfonsoGlenn Research CenterMECHANICAL DRIVES; GEARS; FABRICATION; STRESS ANALYSIS; SIMULATION; FINITE ELEMENT METHOD; VIBRATION DAMPING; NOISE REDUCTION