Research on the Pretension of the NGW Reducer Tumbler Bearing


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The pretension of the central gear floating NGW planetary gear reducer tumbler bearing is studied. The relative displacements of the inner and outer rings of the tumbler bearing are analyzed according to the light, medium and heavy pretension loads. The tumbler bearing is tested in the different pretension loads. In some operating conditions such as constant power, constant rotating speed and constant torque, etc., the transmission efficiency, vibration and temperature of the reducer are tested and analyzed and the dynamic characteristic curve is obtained. According to the test curve, the principles of choosing the pretension loads of the tumbler bearing are presented. The experiment of this paper is also of reference value for studying the pretension of the other types of reducer bearings.



Edited by:

Honghua Tan




H. Z. Zhao et al., "Research on the Pretension of the NGW Reducer Tumbler Bearing", Applied Mechanics and Materials, Vols. 29-32, pp. 275-280, 2010

Online since:

August 2010




[1] Yu Mengsheng and Wu Zongze , Machine Element Handbook , , China Machine Press, Beijing, 1996, p.585, p.1308.

[2] Tianjin University , Theory of Machines and Mechanisms , , Higher Education Press, Beijing, 1989, p.103.

[3] J. E. Shigley , Mechanical Engineering Design , McGraw-Hill , New York , 1988 , p.229.

[4] Liu Zejiu and He Shiquan, Rated Load and Life of Bearing , , China Machine Press, Beijing, 1982 , p.293.

[5] Li Hongguang, Importance of Preloading of Rolling Bearings and Estimation and Adjustment of Preload, Machinery, vol. 42, No. 9, 2004, pp.45-48.

[6] Jiang Shaofeng, Li Zhengshi and Yang Mengxiang, Preload Technique of Angular Contact Ball Bearing, Bearing, No. 3, 2003, pp.1-4.

[7] Jiang Wei, Liang Bo and Li Guangwen, Analysis and Measuring Method for Preload of Duplex Mounting Bearing, Bearing, No. 4, 2001, pp.26-28.