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Model: NACHI 6910ZZE - Two dust cover deep groove ball bearings>
Bearing Size
d = 50D = 72
B = 12
da(min) = 54
Da(max) = 68
ra(max) = 0.6
Mass = 0.125
Basic load rating: 14500
Rated static load: 11700
Limit speed（Grease lubrication）: 5100
