clearance due to heat differential mm bearing steel linear expansion ... do outer ring raceway diameter mm t 0.70 0.90 deff 8.2 where reduced ... amount of clearance due to interference mm deff effective interference mm f outer ... by using formula 8.4 or 8.5 for ball bearings and spherical roller bearings ... 3.0d 8.5 where d bearing bore diameter mm d bearing outside diameter mm 2 ... internal clearance of deep groove ball bearings nominal bore diameter d mm ... 107 125 145 155 175 195 225 250 280 310 340 29 33 36 41 46 51 61 71 84 97 114 130 ... 147 163 195 225 245 270 300 340 380 420 470 520 20 25 28 30 40 45 55 65 ... 90 105 120 140 160 180 200 230 265 300 340 370 410 460 510 570 630 690 a-57 ...
miniature and extra small ball bearings with ring grooves snap rings ... b d 5 12mm boundary dimensions dynamic mm rna min snap ring groove shielded type ... 4 0.3 0.3 1,080 1,330 640 1,080 1,350 2,340 1,260 3,350 4,550 5,100 430 505 365 440 ... 1,960 2,390 110 135 65 110 137 238 128 340 465 520 44 52 37 45 54 90 60 142 200 ... r note mark indicates stainless steel is used b-38 ...