Bearing Supplementary Designation

ZZ – Shield of pressed sheet steel on both sides of the bearing

2RSH – Sheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) on both sides of the bearing

2RS1 – Sheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) on both sides of the bearing

CN – Normal internal clearance

C3 – Bearing internal clearance greater than normal (CN)

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