Development of Sintered Oilless Bearing using Fluid-Dynamic Mechanism For High-RPM Application

유체동압 메카니즘을 이용한 고RPM용 소결함유베어링의 개발

Sintered oilless bearing using fluid-dynamic mechanism for high revolution of over 10,000 rpm was developed by Powder metallurgy Process. Developed bearing was composed of Fe-40-60%Cu of which inner face consisted of six-regular-prominence-and-depression. Inner face has controlled pore size and amount according to application. Jitter and friction properties were tested under assembled conditions with housing and motor. Bearing-own properties and precision were also tested because of demanding for assembled properties. Measurement-skill as well as mould-production-skill were investigated for the precision of bearing. Final precision reached 2 ${\mu}m$ in inner diameter tolerance and 5 ${\mu}m$ in coaxiality under assembled conditions.