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Model: NACHI N304 - Cylindrical roller bearing (N series)>
Bearing Size
d = 20D = 52
B = 15
Ew = 44.5
da(min) = 27
dc(min) = 30
Da(max) = 45
Db(min) = 47
ra(max) = 1
ra1(max) = 0.6
Mass = 0.15
Basic load rating: 20700
Rated static load: 19200
Limit speed（Grease lubrication）: 12000
Limit speed（Oil lubrication） 14000
