6208Z

6208Z is a single-shield deep groove ball bearing in the 6200 series. It has a bore of 40 mm, an outer diameter of 80 mm, and a width of 18 mm. The suffix “Z” indicates a single metal shield on one side, which provides protection against dust and debris while allowing grease retention; the opposite side is typically open or shielded depending on the manufacturer. This makes 6208Z a versatile, low-friction bearing suitable for a wide range of applications.

The bearing is normally constructed from bearing-grade steel, commonly SAE 52100, and features hardened races and chrome steel balls with a standard steel cage. It is designed for radial support with the ability to accommodate some axial load in either direction, typical for deep groove designs. Lubrication is usually provided by grease at the factory, but the bearing can also be relubricated or resealed depending on service conditions. Tolerances follow standard bearing practice (ISO/ABEC classifications vary by manufacturer).

Common uses for the 6208Z include general machinery and automation components, conveyor rollers, small electric motors, gearboxes, and other equipment requiring reliable radial support with modest axial load tolerance. The Z designation means it is not fully sealed, so it is best suited to environments where shielding is sufficient and contamination levels are moderate.

Variants such as 6208ZZ (shielded on both sides) and 6208-2RS (rubber-sealed) exist for higher contamination resistance. When selecting a replacement, it is important to confirm bore, outer diameter, width, shield type, tolerance class, and lubrication requirements.