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Model: NACHI NF256 - Cylindrical roller bearing (NF series)>
Bearing Size
d = 280D = 500
B = 80
Ew = 440
db(min) = 302
db(max) = 478
dd(min) = 365
Da(max) = 478
ra(max) = 4
Basic load rating: 1140000
Rated static load: 1680000
Limit speed（Grease lubrication）: 1200
Limit speed（Oil lubrication） 1400
