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Boundary dimensions(mm) Basic load ratings(N) Limiting speeds(rpm) Mass(g) Bearing Number
d Fw(F) D C B Cr Cor Oil (Approx.) XLB
45 52 68 22 23 34800 56800 3900 290 NA4909-2RS
50 58 72 22 23 37800 61500 3500 295 NA4910-2RS
30 35 47 17 18 20050 24900 5500 104 NA4906-2RS
35 42 55 20 21 22500 37000 4800 175 NA4907-2RS
40 48 62 22 23 33050 50900 4200 252 NA4908-2RS
17 22 30 13 14 6050 10100 9000 40 NA4903-2RS
20 25 37 17 18 14900 17500 7500 80 NA4904-2RS
25 30 42 17 18 16300 21500 6500 89.5 NA4905-2RS
10 14 22 13 14 4560 4660 13000 24.5 NA4900-2RS
12 16 24 13 14 5980 9500 12000 27.5 NA4901-2RS
15 20 28 13 14 5980 9500 10000 37 NA4902-2RS