The seals and lubricants of ball bearings may introduce solid contaminants during bearing rotation. In addition, wear or damage to adjacent components (such as gears) may also generate solid pollutants. When crushed by rolling elements, solid pollutants will be squeezed into the raceway and form indentations. The particles that cause indentation are not necessarily hard particles. Even very soft particles may have adverse effects when their volume is large enough.
The material protruding around the edge of the bearing indentation can cause failure. When the fatigue level reaches a certain level, early peeling may occur (starting from the back end of the indentation, as shown in the figure below). Peeling initially manifests as surface cracks.
Peeling off from the back end of the indentation
The life theory of BLH bearing factory can be used to calculate the degree of service life reduction caused by indentation. The most important operational data required for calculations include bearing type and size, rotational speed, bearing load, lubrication viscosity ratio, as well as the size, hardness, and concentration of pollutant particles.
During the installation of bearings, ensuring the cleanliness of lubricants and careful handling are crucial to prevent indentation damage.
The following figure shows the peeling caused by indentation in deep groove ball bearings. The rolling direction is from bottom to top. The "V-shaped" mark is a typical indentation damage mark in the bearing, and the peeling initially expands outward from the rear end of the indentation here.
Peeling caused by indentation on the inner ring of deep groove ball bearings
The materials we use to manufacture bearings are:
GCr15,AISI420(3CR13),AISI440C(9Cr18Mo),AISI304(0Cr18Ni9),AISI316(0Cr17Ni12Mo2),AISI630(0Cr17Ni4Cu4Nb)
We are a direct bearing factory with a complete range of models. For more model inquiries, please click on the following link:
Summary of High Quality Bearing 6200 Series Models
