The Car Tech. Tutorials. Free E-Books. RoyMech Index page. Free Download. INVENTOR. Alexandria University Mechanical Engineering Dept. 2013. Notes on Ball Bearings. Bearing Nomenclature You can learn a lot about a bearing just from its part number. A typical bearing is the 6203ZZ bearing. This part number can be divided into it's components: which means: Type Code Series Bore Suffix The type code indicates the type of bearing. Type 6, "single-row deep groove", is perhaps the most common type of bearing. If the bearing is an inch bearing (the first digit in the number is an R), then the size is the digit or digits immediately following the R, in 16ths of an inch. If the first digit is a number, however, it is a metric bearing, and the second digit is the series, which reflects the robustness of the bearing.
Yes, they go in that order. Each of these series also establishes a relationship between the bore size, outer diameter, and thickness of the bearing, in accordance with ISO standards. The third and fourth digits indicate the bore size in millimeters. The last letters indicate something special about the bearing. Examples Common Skate Bearings Sources. Autodesk Inventor Tutorial - انفنتور.