Home > En > NSK - Bearing handbook > Formulation of bearing number
Basic numbers Auxiliary symbols
Extentnal features
Seal and shield symbols
Symbol Meaning
Z / ZS Shield on one side only
ZZ / ZZS Shields on both sides
D / DU Contact rubber seal on one side only
DD / DDU Contact rubber seals on both sides
V Non-contact rubber seal on one side only
W Non-contact rubber seals on both sides

 


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Copyright 2009    Last modified: 02/12/2013

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