No.1014E 2017Special Edition on Automotive Bearing Technologies Development of Needle Roller Bearing for High-efficiency Planetary Gear |
| Category | TECHNICAL REPORT |
|---|---|
| Author | M. TANIYAMA NRB Business Development Dept., Bearing Operations Headquarters K. KOTANI Central JAPAN Technical Center, Bearing Operations Headquarters Y. NAKASHIMA NRB Business Development Dept., Bearing Operations Headquarters T. SATOU East JAPAN Technical Center, Bearing Operations Headquarters |
| Abstract | In order to improve the fuel effi ciency of vehicles to counter the current environmental crisis, the development of automatic transmission (AT) has continued to progress for increasing gear steps to multispeed, requiring planetary bearings for high-speed revolution. Moreover, planetary bearings for ATs are used under severe conditions such as high moment and centrifugal force. This paper describes the characteristics and design technique of planetary gear bearing developed by our company which facilitates high effi ciency and high-speed revolution. |
| Keyword | needle roller bearing, planetary gear, automatic transmission, cage and roller |
| Reference | K. CHIHARA, T. SATOU : Trends regarding Needle Roller Bearings for Automatic Transmission Planetary Gears, Koyo Engineering Journal, No.168E (2005) 39. |
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