2Z (ZZ) C3 Metal Shielded Deep Groove Ball Bearings
Single-row deep groove ball bearings with metal shields
C3 indicates that the bearing has a greater-than-normal internal radial clearance between the rolling elements (balls or rollers) and the raceways. This extra space allows the bearing to handle thermal expansion caused by high speeds or high temperatures, preventing seizing
6000 Series (Extra Light): Used when space and weight are primary concerns, and loads are relatively light, such as in small electric motors or household appliances.
6200 Series (Light): The most common "light" series, offering a good compromise between size and performance, used widely in automotive systems and general machinery.
6300 Series (Medium): Features a thicker cross-section with larger balls, allowing it to withstand more significant loads and more demanding operating conditions, ideal for pumps or machine tools.
As you move from the 6000 to the 6300 series, the physical size of the bearing (outer diameter and width) for a constant bore size increases, which allows for larger ball complements and heavier races, resulting in a higher load capacity