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Model: NACHI NP304 - Cylindrical roller bearing (NP series)>
Bearing Size
d = 20D = 52
B = 15
Ew = 44.5
db(min) = 25
db(max) = 47
dc(max) = 30
Da(max) = 45
ra(max) = 1
ra1(max) = 0.6
Basic load rating: 20700
Rated static load: 19200
Limit speed（Grease lubrication）: 12000
Limit speed（Oil lubrication） 14000
