NTN ball bearings with off-center groove collar, Double-seal ball bearing units with oil-resistant seals, Wide inner ring ball bearings with mounting screws
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NTN uses the same steel balls and cage as used in the 62.63 deep groove ball bearing series. In addition, the units feature a double seal that combines oil-resistant synthetic rubber seals on both sides and NTN's unique slinger (also called flinger).
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