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Model: NACHI 6964 - Deep groove ball bearings>
Bearing Size
d = 320D = 440
B = 56
da(min) = 331
Da(max) = 429
ra(max) = 2.5
Mass = 24.1
Basic load rating: 266000
Rated static load: 370000
Limit speed（Grease lubrication）: 1200
Limit speed（Oil lubrication） 1300
