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2024

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01

Rolling bearing

1. The four major parts of rolling bearings:


◆The inner ring is usually a tight fit with the shaft and rotates with the shaft.
◆The outer ring usually cooperates with the bearing seat hole or the shell of the mechanical component to play a supporting role.
◆The rolling elements are evenly arranged between the inner and outer rings with the help of cages. Their row shape, size and quantity directly determine the bearing capacity of the bearing.
◆The cage evenly separates the rolling elements and guides the rolling elements to move on the correct track.


2. Classification of rolling bearing dimensions:


① Miniature bearings—bearings with nominal outer diameter range D <26mm;
② Small bearings - bearings with a nominal outer diameter range of 26 ≤ D < 60 mm;
③ Small and medium-sized bearings—bearings with a nominal outer diameter range of 60 ≤ D < 120 mm;
④ Medium and large bearings - bearings with a nominal outer diameter range of 120 ≤ D < 200 mm;
⑤ Large bearings - bearings with a nominal outer diameter range of 200 ≤ D < 400 mm;
⑥ Extra large bearings - bearings with a nominal outer diameter range of 400 ≤ D < 2000mm;
⑦ Heavy-duty bearings—bearings with nominal outer diameter range D≥2000mm;

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