ntn ball and roller bearings
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bearing tolerances table 6.7 tolerance of thrust ball bearings table 6.7 1 inner rings nominal bore diameter d mm over 18 30 50 80 120 180 250 315 400 500 incl 18 30 50 80 120 180 250 315 400 500 630 high 0 0 0 0 0 0 0 0 0 0 0 class 0,6,5 low -8 -10 -12 -15 -20 -25 -30 -35 -40 -45 -50 high 0 0 0 0 0 0 0 0 0 0 0 class 4 low -7 -8 -10 -12 -15 -18 -22 -25 -30 -35 -40 6 8 9 11 15 19 23 26 30 34 38 class 0,6,5 max 5 6 8 9 11 14 17 19 23 26 30 10 10 10 10 15 15 20 25 30 30 35 5 5 6 7 8 9 10 13 15 18 21 single plane mean bore diameter deviation dmp unit m thrust bearing shaft washer raceway single radial plane bore diameter variation or center washer raceway thickness variation vdp class 4 class 0 class 6 max 3 3 3 4 4 5 5 7 7 9 11 2 2 2 3 3 4 4 5 5 6 7 unit m si class 5 class 4 table 6.7 2 outer rings nominal outside diameter d mm over 10 18 30 50 80 120 180 250 315 400 500 630 incl 18 30 50 80 120 180 250 315 400 500 630 800 high 0 0 0 0 0 0 0 0 0 0 0 0 class 0,6,5 low -11 -13 -16 -19 -22 -
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bearing materials 13 bearing materials 13.1 raceway and rolling element materials while the contact surfaces of a bearing s raceways and rolling elements are subjected to repeated heavy stress they still must maintain high precision and rotational accuracy to accomplish this the raceways and rolling elements must be made of a material that has high hardness is resistant to rolling fatigue is wear resistant and has good dimensional stability the most common cause of fatigue cracking in bearings is the inclusion of non-metallic impurities in the steel by using pure materials low in these non-metallic impurities the rolling fatigue life of the bearing is lengthened for all ntn bearings steel low in oxygen content and non-metallic impurities then refined by a vacuum degassing process as well as outside hearth smelting is used for bearings requiring especially high reliability and long life steels of even higher in purity such as vacuum smelted steel vim var cevm and electro-slag melted ste
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deep groove ball bearings equivalent bearing load dynamic pr xfr yfa fa fa fa e fr fr e e cor xyxy 0.010 0.18 2.46 0.020 0.20 2.14 0.040 0.24 1.83 0.070 0.27 1.61 0.10 0.29 1 0 0.56 1.48 0.15 0.32 1.35 0.20 0.35 1.25 0.30 0.38 1.13 0.40 0.41 1.05 0.50 0.44 1.00 static fr fa por when por fr use por fr abutment and fillet dimensions mm da min mass kg da max ras max approx 186.5 189 189 191 196 196 198 199 199 201 206 210 208 211 209 211 216 220 228 231 231 233 236 240 249 251 251 253 269 271 273 276 218.5 241 271 269 304 364 232 251 281 279 324 380 242 269 301 299 344 400 262 289 329 327 384 440 291 309 349 347 311 349 387 384 1 2 2 2 3 3 1.5 2 2 2 3 4 1.5 2 2 2 3 4 1.5 2 2 2.5 3 4 2 2 2 2.5 2 2 2.5 3 2.03 4.76 6.49 8.8 15.1 35.6 2.62 4.98 6.77 9.18 18.2 41 2.73 7.1 8.68 11.9 21.6 46.3 3 7.69 11.3 15.7 30.2 60.8 4.6 8.28 12.1 16.8 5 13.9 18.5 25 b-21
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high speed single and duplex arrangements brrrd da b ra ra da r d a single a back-to-back arrangement db a face-to-face arrangement df a tandem arrangement dt d 75 105mm boundary dimensions mm basic load ratings dynamic kn rs min 2 limiting speeds static rpm cor grease oil kgf 1 static cor dynamic cr bearing numbers load center mm a mass kg single approx ddbb rls min 2 cr 75 115 130 160 100 110 125 140 170 110 120 130 150 180 115 125 140 160 190 120 130 145 170 200 125 140 150 180 215 130 145 160 190 225 20 25 37 10 16 22 26 39 13 18 22 28 41 13 18 24 30 43 13 18 24 32 45 13 20 24 34 47 13 20 26 36 49 40 50 74 20 32 44 52 78 26 36 44 56 82 26 36 48 60 86 26 36 48 64 90 26 40 48 68 94 26 40 52 72 98 1.1 1.5 2.1 0.6 1 1.1 2 2.1 1 1.1 1.1 2 3 1 1.1 1.5 2 3 1 1.1 1.5 2.1 3 1 1.1 1.5 2.1 3 1 1.1 2 2.1 3 0.6 1 1.1 0.3 0.6 0.6 1 1.1 0.6 0.6 0.6 1 1.1 0.6 0.6 1 1 1.1 0.6 0.6 1 1.1 1.1 0.6 0.6 1 1.1 1.1 0.6 0.6 1 1.1 1.1 48.0 79.5 137 15.1 29.8 58.5 93.0 149 22.1 40.0 60.0 104 161 22.7 39.5 71.
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cylindrical roller bearings b r r1 r b r1 r r1 r1 j r1 r d ew r d d fw j d j type nu type nj type nup type n type nf d 90 110mm basic load ratings dynamic static dynamic kn rs min 2 boundary dimensions mm ddbr1s min 2 limiting speeds static rpm cor grease oil 1 bearing numbers kgf cor cr cr type nu type nj type type nup n 95 170 170 200 200 200 200 150 180 180 180 180 215 215 215 215 160 190 225 170 200 200 200 200 240 240 240 240 180 215 215 215 215 260 43 43 45 45 67 67 24 34 34 46 46 47 47 73 73 26 36 49 28 38 38 53 53 50 50 80 80 28 40 40 58 58 55 2.1 2.1 3 3 3 3 1.5 2.1 2.1 2.1 2.1 3 3 3 3 2 2.1 3 2 2.1 2.1 2.1 2.1 3 3 3 3 2 2.1 2.1 2.1 2.1 3 2.1 2.1 3 3 3 3 1.1 2.1 2.1 2.1 2.1 3 3 3 3 1.1 2.1 3 1.1 2.1 2.1 2.1 2.1 3 3 3 3 1.1 2.1 2.1 2.1 2.1 3 230 286 259 335 370 460 93.0 183 249 258 335 299 380 410 570 105 201 320 131 240 293 320 385 360 450 605 675 139 260 335 350 450 450 298 370 285 385 460 585 126 217 305 340 445 335 425 505 715 142 241 360 174 290 365 415 515 400 525 790 880
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tapered roller bearings sa sb r1a ra da db da db equivalent bearing load dynamic pr xfr yfa fa fa e fr fr exyxy 1 0 0.4 y2 static por 0.5fr yofa when por fr use por fr for values of e y2 and yo see the table below dimensions series to iso da min abutment and fillet dimensions mm db max max load constant center mm sb min axial load factors mass kg da min db min sa min ras max r1as max a e y2 yo approx 2fb 2db 2dd 2fb 3cc 2db 2dd 2fb 2fd 3cc 4cc 2ce 3cc 2cd 5cd 2de 2fb 7fb 2fd 4cc 2de 4cc 2ce 3db 3dc 5dc 2de 2fb 20.5 22.5 22.5 22.5 22.5 24.5 25.5 25.5 28.5 28.5 28.5 26.5 29.5 29.5 30.5 30.5 30.5 30.5 30.5 30.5 33.5 33.5 33.5 33.5 33.5 33.5 35.5 35.5 35.5 35.5 35.5 35.5 38.5 22 23 23 22 24 25 27 26 28 27.5 27 27 30 29 31 31 31 30 30 30 34 34 34 32 33 34 35 35.5 37 37 35 36 40 36.5 34.5 34.5 34.5 41.5 37.5 41.5 41.5 43.5 43.5 43.5 39.5 42.5 42.5 46.5 46.5 46.5 46.5 46.5 46.5 53.5 53.5 53.5 53.5 46.5 52.5 49.5 49.5 56.5 56.5 56.5 56.5 63.5 35 33 33 33 40 36 40 39 42.5 39.5 43 38 40 40 44 43
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tapered roller bearings r1a ra da db da db equivalent bearing load dynamic pr xfr yfa fa fa e fr fr exyxy 1 0 0.4 y2 static por 0.5fr yofa when por fr use por fr for values of e y2 and yo see the table below bearing numbers abutment and fillet dimensions mm ras da db da db max load constant axial center load factors mm r1as max mass kg approx a e y2 yo 4t-397/394a 4t-jhm911244/jhm911211 4t-28985/28921 4t-3980/3920 4t-hm212044/hm212011 4t-5583/5535 4t-558/552a 4t-hm813841/hm813810 4t-65237/65500 4t-hm911245/hm911210 4t-392/394a 4t-h715334/h715311 4t-h913842/h913810 4t-28990/28920 4t-28995/28920 4t-l610549/l610510 4t-29585/29520 4t-29586/29520 4t-390a/394a 4t-29585/29521 4t-3982/3920 4t-39585/39520 4t-477/472 4t-483/472 4t-hm212046/hm212011 4t-5584/5535 4t-559/552a 4t-565/563 4t-hm813842/hm813810 4t-639/632 4t-78250/78551 4t-jlm710949/jlm710910 4t-jm511946/jm511910 1 69 84 73 75 85 78 73 80 82 87 70 86 90 72 75 71 77 73 73 77 77 77 73 78 80 81 78 80 82 81 85 77 78 68 74 67 68 70 72 69 7
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four row tapered roller bearings c2 r r1 b2 d da d da sa d 304.800 360mm boundary dimensions dynamic mm d d b2 c2 r1s min 1 basic load ratings static dynamic kn kgf cor cr static rs min 1 cr cor 304.800 304.902 305.003 317.500 320 330 330.200 333.375 340 341.312 342.900 343.052 346.075 347.662 355 355.600 495.300 412.648 438.048 422.275 447.675 460 470 510 482.600 469.900 480 457.098 533.400 457.098 488.950 469.900 490 444.500 457.200 482.600 488.950 508 600 342.900 266.700 280.990 269.875 327.025 338 340 340 306.388 342.900 350 254.000 307.985 254.000 358.775 292.100 316 241.300 252.412 265.112 317.500 370 540 349.250 266.700 279.400 269.875 327.025 338 340 340 311.150 342.900 350 254.000 301.625 254.000 358.775 292.100 316 241.300 252.412 269.875 317.500 370 540 3.3 3.3 3.3 1.5 3.3 5 2.5 6 1.5 3.3 6 1.5 3.3 1.5 3.3 3.3 1.5 1.5 1.5 1.5 1.5 6 5 b-218 6.4 3.3 4.8 3.3 3.3 4 2.5 6 3.3 3.3 5 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 5 5 3,650 2,610 2,630 2,260 2,820 2,940 3,150 3,900 2,810 4
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withdrawal sleeves for spherical roller bearings g1 ra b3 d1 b4 da da g d1 75 115mm boundary dimensions mm bearing numbers abutment and fillet dimensions mm g1 b4 2 mass kg 3 appropriate nut no 4 d1 g 1 da min max min da max ras max approx b3 75 m90 m90 m90 m90 m95 m95 m95 m95 m100 m100 m100 m100 m100 2 2 2 2 2 2 2 2 2 2 2 2 2 48 48 48 71 52 52 52 74 53 53 63 53 79 57 57 85 59 73 59 90 68 82 68 82 63 98 60 73 73 75 8 8 8 12 9 9 9 13 9 9 10 9 14 10 10 16 10 11 10 16 11 13 11 11 12 16 13 13 13 12 52 52 52 75 56 56 56 78 57 57 67 57 83 61 61 89 63 77 63 94 72 91 72 86 67 102 64 82 82 79 22216ek 22216bk 21316k 22316bk 22217ek 22217bk 21317k 22317bk 22218ek 22218bk 23218bk 21318k 22318bk 22219bk 21319k 22319bk 22220bk 23220bk 21320k 22320bk ah 316 ah 316 ah 316 ahx 2316 ahx 317 ahx 317 ahx 317 ahx 2317 ahx 318 ahx 318 ahx 3218 ahx 318 ahx 2318 ahx 319 ahx 319 ahx 2319 ahx 320 ahx 3220 ahx 320 ahx 2320 90 90 92 92 95 95 99 99 100 100 100 104 104 107 109 109 112 112 114 11
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