SKF 71909 CB/P4AL super-precision Angular contact ball bearings

d:45 mm; D:68 mm; B:12 mm; d1:53.45 mm; d2:52.4 mm; D2:61.8 mm; b:2 mm; C1:5.9 mm; C2:2.8 mm; C3:1.7 mm; r1,2 min.:0.6 mm; r3,4 min.:0.3 mm; a:16.1 mm; da min.:48.2 mm; db min.:48.2 mm; Da max.:64.8 mm; Db max.:66 mm; ra max.:0.6 mm; rb max.:0.3 mm; dn:54.2 mm; Basic dynamic load rating C:9.95 kN; B