The 8000 Series Ball Bearings

8000 WC8800

These SRDG radial ball bearings combine some interesting elements of an older, functional design with benefits provided by modern technology and components to create a bearing with an unusual appearance.

This series of bearing was originally designed utilizing the most "modern" technology of its day—a seal made from a very thick felt material. The seal’s thick felt material enhanced its sealing capacity and the bearing’s inner ring(s) were extended to ensure the seal was in complete contact with the inner ring across the seal’s entire surface. If a seal was used only on one side of the bearing, the inner ring was extended on one side only. If a seal was installed on both sides of the bearing, the inner ring was also extended on both sides. The most common designation for a felt seal installed in the bearing was 8. In applications where a more dimensionally proportioned bearing was needed, the outer ring was extended to match; thus the designation WC to indicate wide cup.

Today, the most sophisticated seal designs and materials have been incorporated into this bearing and are used instead of the original felt seal designs, but the legacy of the single or double-sided extended inner ring, wide cup, as well as nomenclature using the 8 and WC, remain.

Examples of the NTN Felt Seal Ball Bearing Series