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Rolling Bearing Failure Phenomenon And Reason Analysis (Two)
Nov 30, 2017

7, pitting

Phenomenon: the metal surface was punctate from the substrate off, there are visible areas and depth of defense can also be called pitting

Analysis: Material fatigue, improper heat treatment, caused by partial load, impact and so on

Note: symmetrical distribution along the circumference of the circle, the Department of bearing hole is not round; tilt, the Department of installation skew, shaft bending and a moment load

8, pinhole

Phenomenon: pinhole off, there is a certain depth

Analysis: Material fatigue, improper heat treatment, caused by partial load, impact and so on

Note: the gap is too small, the load is too large, lack of oil and so can lead to early fatigue, while another installation of mechanical damage

9, rolling the skin

Phenomenon: the metal on the work surface, was a very thin layer of rolling off

Analysis: Material fatigue, improper heat treatment, caused by partial load, impact and so on

10, impact indentation

Phenomenon: the work surface remains mechanical damage indentation, mostly bright sunken or smooth excessive reddish brown marks

Analysis: During the handling or assembly process impact and run too large

11, electric erosion

Phenomenon: a little spotted and banded marks

Analysis: current through the bearing, resulting in gap discharge lead to erosion

Note: Electro-erosion metal is divided into four layers: metamorphic layer, changing layer, over burning layer, normal layer

12, color

Phenomenon: Surface oxidation discoloration, according to the oxidation temperature from low to high were light blue, blue, brown and iron black, etc.

Analysis: abnormal temperature caused by bearing failure or ferrule heating process over temperature caused by pyrolysis of oil attached to the work surface


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    Add: Build A, Dongya Industrial Park, Dache Industrial District, Nanlang Town, Zhongshan, Guangdong, China
    Tel: +86-760-88262588-619
    Mob: +8613928150832
    E-mail: roy@chnsteelball.com
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