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Model: NACHI NNU4960K - Cylindrical roller bearing, tapered hole NNU series)>
Bearing Size
d = 300D = 420
B = 118
Fw = 339
Da(max) = 407
da(min) = 313
da(max) = 335
da1(min) = 320
ra(max)= 2.5
Mass = 46.7
Basic load rating: 1220000
Rated static load: 2880000
Limit speed（Grease lubrication）: 1300
Limit speed（Oil lubrication） 1500
