NSK water pump bearing numbering system, nomenclature
The NSK water pump bearing numbering system is outlined above drawing. As we all know, NSK bearing numbers are alphanumeric combinations that indicate the NSK bearing type, boundary dimensions, dimensional and running accuracies, internal clearance, and other related specifications. please refer to NSK bearing nomenclature.
NSK water pump nomenclature
RWF: Ball Roller type water pump bearing
BWF: Ball ball type water pump bearing
Design of chamfer
No symbol: Standard chamfer
a: special chamfer
Front seal symbol
R, R1, R2, ...
Rear seal symbol
This symbol is omitted when rear seals and front seals are the same.
No symbol: bearing steel (SUJ2)
g3: Carburized steel (Shaft only)