Abstract
Sliding leadscrews have advantage of high stiffness and vibration damping property though they have disadvantage of large friction loss. This study proposes a method of improving the frictional property by supplying compressed, air, the pressure of which is limited to the range that the screw shaft and the nut keep contact, between the thread flanks so as to support a part of axial load. The previous report explained the basic experiments using simplified cylindrical model to obtain fundamental data for development of the "half-floating leadscrew". This report explains an actual half-floating leadscrew manufactured on trial. Some experimental results are shown on the frictional property under the condition that the air pressure is supplied between the screw shaft and the nut.
