APPLICATION OF HARMONIC DRIVE GEARS IN MACHINE TOOLS
New technologies which are mainly based on high speed and precision (robots, manipulators, machine tools, etc.) impose special requirements for gears. Other technologies such as telescopes, radar systems, antenna systems, etc., require high accuracy and speed of positioning. Common for all these facilities and devices are transfer of information, energy and materials from one state to another without bringing their own faults in the system. So, it is important that gears do not have excessive internal backlash. Harmonic drive gears are one of the newer gears which in there is no internal backlash. Harmonic drive gears have other advantages such as high capacity output bearing, high torque capacity, excellent positioning accuracy and repeatability, compact design, high single stage ratios, high torsional stiffness, high efficiency, simple installation and assembly, etc. In this paper it is described some cases of using Harmonic drive gear in machine tools.