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Model: NACHI 6804ZZE - Two dust cover deep groove ball bearings>
Bearing Size
d = 20D = 32
B = 7
da(min) = 22
Da(max) = 30
ra(max) = 0.3
Mass = 0.019
Basic load rating: 4000
Rated static load: 2640
Limit speed（Grease lubrication）: 12000
