Ball and Roller Bearings

Double Row Cylindrical Roller BearingsBrBrrrDd FWdD EwddCylindrical boreType NNUTapered boreCylindrical boreType NNTapered bored Boundary dimensions Basic load ratings Limiting speeds Bearingdynamic static dynamic staticmm kN kgf min -1 type NNUcylindrical tapered d D B rs min Cr Cor Cr Cor grease oil bore bore25 47 16 0.6 25.8 30.0 2 630 3 050 14 000 17 000 303540455055606570758085909510010511055 19 1 31.0 37.0 3 150 3 800 12 000 15 000 62 20 1 38.0 47.5 3 850 4 850 11 000 13 000 68 21 1 43.5 55.5 4 400 5 650 9 700 11 000 75 23 1 52.0 68.5 5 300 7 000 8 800 10 000 80 23 1 53.0 72.5 5 400 7 400 8 000 9 400 90 26 1.1 69.5 96.5 7 050 9 850 7 300 8 600 95 26 1.1 71.0 102 7 250 10 400 6 700 7 900 100 26 1.1 75.0 111 7 650 11 400 6 200 7 300 110 30 1.1 94.5 143 9 650 14 600 5 800 6 800 115 30 1.1 96.5 149 9 850 15 200 5 400 6 300 125 34 1.1 116 179 11 800 18 200 5 100 5 900 130 34 1.1 122 194 12 400 19 800 4 800 5 600 140 37 1.5 143 228 14 600 23 200 4 500 5 300 145 37 1.5 146 238 14 900 24 200 4 300 5 000 140 40 1.1 131 260 13 300 26 500 4 300 5 100 NNU4920 NNU4920K150 37 1.5 153 256 15 600 26 100 4 000 4 800 145 40 1.1 133 268 13 500 27 400 4 100 4 800 NNU4921 NNU4921K160 41 2 198 320 20 200 33 000 3 800 4 500 150 40 1.1 137 284 14 000 28 900 3 900 4 600 NNU4922 NNU4922K170 45 2 229 375 23 300 38 000 3 600 4 300 "K" indicates bearings have tapered bore with a taper ratio of 1: 12. Smallest allowable dimension for chamfer dimension r.B-102