The importance of bearing steel balls in various mechanical equipment

- Oct 02, 2020-

Bearing steel ball is a very important basic part of all kinds of mechanical equipment, and it is also an indispensable part in the automobile, completion, aerospace and other mechanical industries. With the development of modern science and technology, my country's demand for high-end mechanical equipment is increasing, and more and more stringent requirements are placed on the manufacturing accuracy of mechanical parts. In this way, there is an urgent need for a large number of high-performance, high-precision ball bearings to be put on the market to meet the needs of the automotive, military, aerospace, and machinery industries, and to continuously promote the technological progress of my country’s defense industry, automotive industry, and aerospace industry, and improve my country’s international Competitiveness.


A large number of tests have shown that the quality of the steel ball directly affects the performance of the bearing. Its various technical indicators mainly include: steel ball shape error, steel ball surface roughness, steel ball surface defects, etc.


1. The influence of steel ball shape error on bearing performance


The shape error of the steel ball is one of the important reasons affecting bearing vibration and noise. The greater the shape error, the greater the vibration of the bearing. When the bearing rotates, due to the existence of the shape error of the steel ball, the center position of the steel ball is constantly changed, which causes the low-frequency vibration and noise of the bearing.


2. The influence of steel ball surface roughness on bearing performance


The surface roughness of the steel ball refers to the surface roughness of the steel ball except for spherical errors and unexpected waviness. The surface roughness of the steel ball has a great influence on the medium and high frequency vibration of the bearing, causing the bearing to produce noise. The surface roughness of the steel ball has a far greater influence on the bearing vibration than the surface of the raceway of the ring. The larger the value, the higher the vibration of the bearing. Therefore, the surface roughness of the steel ball must be strictly controlled.


3. The influence of steel ball surface defects on bearing performance


The surface defects of the steel ball refer to the cracks, scratches, corrosion and dents on the surface of the steel ball caused by machining, rust, corrosion or raw materials. Because the surface defects of the steel ball will cause the pulse-shaped vibration of the bearing, causing vibration and noise when the bearing rotates, the steel ball is not allowed to have surface defects. The period of the pulse is inversely proportional to the bearing speed. The amplitude is related to the size of the defect. It is found through testing that the larger the surface defect of the steel ball, the higher the bearing vibration value.