1. Increased Simultaneous Iterlocking Number of teeth interlocking at a time may be more than tripled as compared with a cylingrical worm gear. 2. Improvement in Contact-Line Position A contact-line position, or a contact area can be improved by way of changing an inclination angle of a worm tooth. Fig.3 shows a good contact area. 3. Reduced Sizw & Weight As is sh ...View more