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    Ferculum cylindricum rotulorum sine anulo interiori Series unius ordinis: RNU, fercula cylindrica rotulorum cylindricorum unius ordinis seriei RNU in ferculis cylindricis rotulorum designatis NU fundantur et sine anulo interiori suppeditantur. Haec fercula typice adhibentur in applicationibus ubi canales duri et politi in axe praebentur. Quia fercula RNU anulum interiorem non habent, diameter axis maior esse potest ut dispositio ferculi validior et rigidior praebeatur. Praeterea, possibilis dislocatio axialis axis respectu involucri solum a canale in axe limitatur.
    Series RNU
    Numerus Ferendi Magnitudo (mm)
    Fw Tolerantia Fw D B rs min a
    RNU 202 20 +0.010 0 35 11 0.6 3
    RNU 203 22.9 40 12 0.6 3.25
    RNU 204 27 47 14 1 3.75
    RNU 205 32 +0.015 0 52 15 1 4.25
    RNU 206 38.5 62 16 1 4.25
    RNU 207 43.8 72 17 1.1 4
    RNU 208 50 80 18 1.1 4
    RNU 209 55 85 19 1.1 4.5
    RNU 210 60.4 90 20 1.1 5
    RNU 211 66.5 +0.020 0 centum 21 1.5 5
    RNU 212 73.5 110 22 1.5 5
    RNU 213 79.6 CXX 23 1.5 5
    RNU 214 84.5 125 24 1.5 5.5
    RNU 215 88.5 130 25 1.5 5.5
    RNU 216 95.3 140 26 2 5.5
    RNU 217 101.8 CL 28 2 6
    RNU 218 107 CLX 30 2 6
    RNU 219 113.5 CLXX 32 2.1 6.5
    RNU 220 CXX CLXXX 34 2.1 7
    RNU 221 126.8 190 36 2.1 7.5
    RNU 222 132.5 ducenti 38 2.1 7.5
    RNU 224 143.5 215 40 2.1 8
    RNU 226 CLVI +0.025 0 230 40 3 8
    RNU 228 CLXIX 250 42 3 8
    RNU 230 CLXXXII 270 45 3 8.5
    RNU 232 195 290 48 3 9
    RNU 234 208 CCCX 52 4 10
    RNU 236 218 CCCXX 52 4 10
    RNU 238 231 340 55 4 10.5
    RNU 240 244 360 58 4 11
    RNU 244 270 +0.030 0 quadringenti 65 4 12.5
    Numerus Ferendi Magnitudo (mm)
    Fw Tolerantia Fw D B rs min a
    RNU 304 28.5 +0.010 0 52 15 1.1 3.5
    RNU 305 35 +0.015 0 62 17 1.1 4
    RNU 306 42 72 19 1.1 4.5
    RNU 307 46.2 80 21 1.5 5
    RNU 308 53.5 90 23 1.5 5.5
    RNU 309 58.5 centum 25 1.5 5.5
    RNU 310 65 110 27 2 6
    RNU 311 70.5 +0.020 0 CXX 29 2 6
    RNU 312 77 130 31 2.1 6.5
    RNU 313 83.5 140 33 2.1 7
    RNU 314 90 CL 35 2.1 7.5
    RNU 315 95.5 CLX 37 2.1 7.5
    RNU 316 103 CLXX 39 2.1 8.5
    RNU 317 108 CLXXX 41 3 8.5
    RNU 318 115 190 43 3 9
    RNU 319 121.5 ducenti 45 3 9.5
    RNU 320 129.5 215 47 3 9.5
    RNU 321 135 225 49 3 9.5
    RNU 322 143 240 50 3 9
    RNU 324 CLIV 260 55 3 9.5
    RNU 326 CLXVII +0.025 0 280 58 4 10
    RNU 328 CLXXX trecenti 62 4 11
    RNU 330 193 CCCXX 65 4 11.5
    RNU 332 208 340 68 4 13
    RNU 334 220 360 72 4 13.5
    RNU 336 232 380 75 4 13.5
    RNU 338 245 quadringenti 78 5 14
    RNU 340 260 420 80 5 15
       
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