Usually insert ball bearing failure reason

Insert ball bearing contact fatigue failure is bearing working surface caused by the effect of alternating stress and failure, and deep spalling is the inner reason of contact fatigue failure. We know that contact fatigue spalling occurred in the set-contained spherical bearing working surface, often accompanied by fatigue crack, begin from the contact surface of alternating shear stress produces, the biggest flake and then expands to form a different shape, such as dot to pitting corrosion or pitting spalling, peel into small sheet according to the shallow flaking. Due to spalling surface expands gradually, and often to deep extension, forming deep spalling. Refers to the relative sliding friction between the surface abrasion failure lead to constant wear and tear of the working surface of the metal and the failure. Continuous wear will cause bearing parts damaged gradually, and ultimately result in the loss bearing dimensional accuracy and other related issues. Wear may affect the shape change, the increase of fit clearance and working surface morphology change, may affect the lubricant or make its pollution to a certain degree of lubrication function is lost, so that loss of bearing rotating accuracy and will not operate properly. Wear failure is one of the common failure modes of all kinds of bearings, according to the wear and tear is usually divided into one of the most common form of abrasive wear and adhesive wear.