1. Product Overview 6302-2NSE follows NACHI standard single row deep groove ball bearing designation. 2NSE : NACHI specification, double-sided contact NBR rubber seal, functionally equivalent to universal 2RS seal type It bears radial load plus minor bidirectional axial load. Contact lip seals effectively block dust, moisture splash and retain factory pre-filled grease. Suitable for medium-speed, dusty and humid working environments with long maintenance-free operation.