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Model: NACHI 16004 - Deep groove ball bearings>
Bearing Size
d = 20D = 42
B = 8
da(min) = 25
Da(max) = 37
ra(max) = 0.3
Mass = 0.05
Basic load rating: 7900
Rated static load: 4500
Limit speed（Grease lubrication）: 17000
Limit speed（Oil lubrication） 21000
