Page 48 of Nice Ball Bearings by RBC Bearings
steering column and strut bearings he nicetm nb543-1dctn radial bearing is a fully ground double sealed thin section bearing it is used in the headset of high-end bicycles because of shock loads severe environmental conditions and the necessity of smooth feel for the rider this bearing requires a high degree of accuracy and reliability unique metal backed nitrile seals are utilized to retain a special water-resistant grease for a greased-for-life bearing t he 8493-v is a thrust ball bearing in which one of the rings is partially encapsulated in plastic it is used in front strut mount applications of front wheel drive automobiles it has the advantage of combining low mounting height low weight and reduced operational noise t he nicetm 8408-1v is a full complement angular contact ball bearing used in steering column applications it incorporates precise yet economical solid races and features a ground o.d for close-tolerance housing fits t 48
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