Preload-service life correlation for ball bearings on machine tool main spindles

Wear ◽  
1994 ◽  
Vol 172 (1) ◽  
pp. 79-83 ◽  
Author(s):  
G.D. Hagiu ◽  
M.D. Gafitanu
Keyword(s):  
Service Life ◽  
Machine Tool ◽  
Ball Bearings

A Study of Precision Ball Bearings for Machine Tool

1965 ◽  
Vol 68 (556) ◽  
pp. 607-621
Author(s):  
Yoshiaki GOTO ◽  
Toshiaki WATANABE
Keyword(s):  
Machine Tool ◽  
Ball Bearings

Nonlinear Behaviors of the Machine-Tool Spindle System Supported by Ball Bearings With Clearance

2008 ◽  
Author(s):  
S.-H. Gao ◽  
X.-H. Long ◽  
H.-G. Li ◽  
G. Meng
Keyword(s):  
Machine Tool ◽  
Natural Frequency ◽  
Excitation Frequency ◽  
Ball Bearings ◽  
Spindle System ◽  
Nonlinear Responses ◽  
Machine Tool Spindle ◽  
Loss Of Contact ◽  
The Impact ◽  
Inner Race

In this effort, the nonlinear dynamics of a machine-tool spindle system supported by ball bearings is investigated. Considering the loss of contact between the inner race and ball in the ball bearing, the system is described by a set of second order nonlinear differential equations with piecewise stiffness and damping. The nonlinear responses of the system exhibit the softening behavior due to the loss of contact. As the initial preload is applied to the spindle system and the balls are fully contacting with the inner race of the bearing, the nonlinear responses of the system switche to the hardening behavior. Due to the 3/2 nonlinearity, resonance are found when the excitation frequency is close to one-third of the first natural frequency, one-half of the first nature frequency, two-third of the first natural frequency, and the first natural frequency. The route of the period-doubling bifurcation to chaos and the tori doubling process to chaos which usually occurs in the impact system are also observed in this spindle-bearing system.

scholarly journals Development and Practical Application of MQCJ-Lubricated Angular Contact Ball Bearings for Machine Tool Main Spindles

2008 ◽  
Vol 74 (6) ◽  
pp. 539-542
Author(s):  
Masatsugu MORI ◽  
Yoshinobu AKAMATSU ◽  
Mineo KOYAMA ◽  
Futoshi KOSUGI ◽  
Hiroshi TAKIUCHI ◽  
...  
Keyword(s):  
Machine Tool ◽  
Ball Bearings ◽  
Practical Application

scholarly journals Service Life of Lubricating Grease in Ball Bearings (Part 2) Analysis of Service Life Based on Infiltration Characteristics of Base Oil

2021 ◽  
Vol 16 (4) ◽  
pp. 246-254
Author(s):  
Ryosuke Ichimura ◽  
Tomonobu Komoriya ◽  
Tsuyoshi Kochi ◽  
Michitaka Yoshihara ◽  
Masataka Sakai ◽  
...  
Keyword(s):  
Service Life ◽  
Ball Bearings ◽  
Lubricating Grease ◽  
Base Oil

scholarly journals Service Life of Lubricating Grease in Ball Bearings (Part 1) Behavior of Grease and Its Base Oil in a Ball Bearing

2021 ◽  
Vol 16 (4) ◽  
pp. 236-245
Author(s):  
Tomonobu Komoriya ◽  
Ryosuke Ichimura ◽  
Tsuyoshi Kochi ◽  
Michitaka Yoshihara ◽  
Masataka Sakai ◽  
...  
Keyword(s):  
Service Life ◽  
Ball Bearing ◽  
Ball Bearings ◽  
Lubricating Grease ◽  
Base Oil

TEST RESULTS FOR BALL-BEARINGS IN THE DRIVES OF SYSTEMS AND SCIENTIFIC EQUIPMENT OF A SPACECRAFT IN OSCILLATORY OPERATIONAL MODE

2019 ◽  
pp. 85-93
Author(s):  
R.S. Gorodetsky
Keyword(s):  
Service Life ◽  
Oscillatory Motion ◽  
Oscillatory Mode ◽  
Ball Bearings ◽  
Operational Mode ◽  
Scientific Equipment ◽  
Continuous Rotation ◽  
Torque Moment ◽  
Lubrication Mode ◽  
Set Up

This paper aims at elucidating some special operational aspects of instrument ball bearings used in systems and scientific equipment of a spacecraft in oscillatory mode in vacuum with the lubricant VNII NP-274n. The service life of such bearings is mostly determined by the lubrication mode, as well as anti-torque moment, which is an indicator of internal energy losses. To observe these parameters in the course of bearings operation in oscillatory mode in vacuum an electromechanical test rig was set up. The test data obtained in oscillatory mode were compared with data obtained during continuous rotation of the same bearings. Based on the results of the tests, a lubricating mode was determined, an empirical formula was proposed for the relationship between the anti-torque moment and oscillatory motion parameters, as well as recommendations on extending the service life were provided. The paper may be of use to developers of systems and scientific instrumentation of a SC with oscillating shaft, which uses as supports ball bearings with predominantly axial load. Key words: spacecraft life, oscillatory motion, rotational resistance, lubrication mode, inertial slippage

scholarly journals The effect of lubricant viscosity on the performance of full ceramic ball bearings

2022 ◽  
Author(s):  
Jian Sun ◽  
Jiaxing Yang ◽  
Jinmei Yao ◽  
Junxing Tian ◽  
Zhongxian Xia ◽  
...  
Keyword(s):  
Service Life ◽  
Contact Surface ◽  
Temperature Rise ◽  
Ball Bearing ◽  
Ball Bearings ◽  
Axial Loads ◽  
Angular Contact Ball Bearing ◽  
Ceramic Ball ◽  
The Relationship ◽  
Lubricant Viscosity

Abstract As a new high-end bearing product, full ceramic ball bearings are favoured in a variety. However, there have been few studies on the lubrication of full ceramic ball bearings. The purpose of this study is to reveal the relationship between the vibration and temperature rise of full ceramic angular contact ball bearings and the lubricant viscosity, and to improve the service life of the bearings. In this study, the effects of lubricant viscosity on the vibration and temperature rise of silicon nitride full ceramic angular contact ball bearings under different axial loads and rotation speeds were tested. Herein, a mathematical model of oil lubrication suitable for full ceramic ball bearings is established and the relationship between the lubricant viscosity, lubricant film thickness, outer ring vibration and temperature rise of the bearing is analyzed. It was found that the vibration and temperature rise first decrease and then increase with the increase of lubricant viscosity. In this range, there is an optimal viscosity value to minimize the vibration and temperature rise of the full ceramic angular contact ball bearing. The contact surface wear of the full ceramic angular contact ball bearing varies greatly under different lubricant viscosities. There is no obvious wear on the contact surface under optimal viscosity, and the service life of the bearing is greatly improved. These results can play an important role in revealing the lubricant mechanism of full ceramic ball bearings and improving their service life under optimal lubrication.

Ferrofluid lubrication for ball bearings to avoid starvation

2020 ◽  
Vol 72 (10) ◽  
pp. 1227-1231
Author(s):  
Mancheng Xu ◽  
Guanghu Jin ◽  
Qingwen Dai ◽  
Wei Huang ◽  
Xiaolei Wang
Keyword(s):  
Magnetic Field ◽  
Service Life ◽  
Peer Review ◽  
Design Methodology ◽  
Ball Bearing ◽  
Magnetic Circuit ◽  
Ball Bearings ◽  
Rolling Bearings ◽  
Content Type ◽  
Circuit Structure

Purpose This paper aims to prevent oil starvation and improve the service life of the rolling bearings. Design/methodology/approach A thrust ball bearing with magnetic circuit structure is proposed for ferrofluid lubrication. With the aid of magnetic field, ferrofluid can be maintained in the contact area of rolling bodies to delay lubricant loss. Experiments are performed to ensure the validity of the designed bearing. Findings Compared with conventional lubricant, service life of the ferrofluid lubricated bearing can be prolonged under magnetic field. In addition, with a proper magnetic field distribution, lubricant starvation may be limited under the conditions of present experiments. Originality/value This work provides a method to control the starved lubrication of rolling bearings with restricted lubricant supply. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2020-0132/

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