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Model: NACHI 7208DB - Angular contact ball bearings (DB) back to back>
Bearing Size
d = 40D = 80
B = 18
a = 8.3
da1(min) = 47
da2(min) = 45
Da1(max) = 73
Da2(max) = 75
ra(max) = 1
ra1(max) = 0.6
Mass = 0.38
Basic load rating: 57500
Rated static load: 50500
Limit speed（Grease lubrication）: 6000
Limit speed（Oil lubrication）: 8000
