ntn main spindle bearings 5 accuracy of cylindrical roller bearings table 10.2 inner rings nominal bore diameter single plane mean bore diameter deviation single radial plane bore diameter variation mean bore diameter deviation inner ring radial runout d class 5 high low dmp class 4 1 high low class 2 1 high low vdp vdmp kia over incl diameter series 9 diameter series 0 class 5 class 4 class 2 class 5 class 4 class 2 class 5 class 4 class 2 class 5 class 4 class 2 max max max max 18 30 50 80 120 150 180 250 315 400 30 50 80 120 150 180 250 315 400 500 0 0 0 0 0 0 0 0 0 6 8 9 10 13 13 15 18 23 0 0 0 0 0 0 0 5 6 7 8 10 10 12 0 0 0 0 0 0 0 2.5 2.5 4 5 7 7 8 6 8 9 10 13 13 15 18 23 5 6 7 8 10 10 12 2.5 2.5 4 5 7 7 8 5 6 7 8 10 10 12 14 18 4 5 5 6 8 8 9 2.5 2.5 4 5 7 7 8 3 4 5 5 7 7 8 9 12 2.5 3 3.5 4 5 5 6 1.5 1.5 2 2.5 3.5 3.5 4 4 5 5 6 8 8 10 13 15 3 4 4 5 6 6 8 2.5 2.5 2.5 2.5 2.5 5 5 1 the tolerance of bore diameter deviation ds applicable to classes 4 and 2 is the same as the toleranc
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ntn main spindle bearings interchangeable radial internal clearance cylindrical bore table 10.6 nominal bore diameter unit normal incl min max min max min max d over 24 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355 400 450 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355 400 450 500 0 5 5 10 10 15 15 15 20 25 35 45 45 55 55 65 100 110 110 25 30 35 40 45 50 55 60 70 75 90 105 110 125 130 145 190 210 220 20 25 30 40 40 50 50 60 70 75 90 105 110 125 130 145 190 210 220 45 50 60 70 75 85 90 105 120 125 145 165 175 195 205 225 280 310 330 35 45 50 60 65 75 85 100 115 120 140 160 170 190 200 225 280 310 330 60 70 80 90 100 110 125 145 165 170 195 220 235 260 275 305 370 410 440 adjustment of clearance in tapered bore bearings mounted internal clearance of a tapered bore bearing can be adjusted by controlling the drive-up of the tapered bore onto the shaft two types of adjusting methods area available repeated adjustment of spacer width and adjustment with using a mount
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ntn main spindle bearings 9 ultra high speed double row cylindrical roller bearings nn30hsrt6 type nn30hsrt6 ultra high speed double row cylindrical roller bearings have higher operating speed with the same level of rigidity and capacity as the conventional series bearing design features 1 optimized internal design to realize high speed and low temperature rise 2 molded peek cage is used for high speed under grease air-oil lubrication and grease life fig 10.4 nn30hsrt6 type permissible speed range dmn value 106 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 grease lubrication air-oil lubrication nn30hsrt6 notes permissible speed of each bearing dmn value varies depending on the specifications of the machine for which the bearing is used motor drive system cooling system and construction around the bearing consider the optimal choice referring to the above guideline and contact ntn cage design cage is made of peek which is very light and strong photo 10.1 smaller deformatio
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ntn main spindle bearings high-speed operation test with grease lubrication due to an optimized internal design the n10hsr type is capable of high-speed operation with dmn value of 1.15 million [grease lubrication or 2.3 million [air-oil lubrication figs 10.6 10.7 10.8 10.9 test conditions test bearing shaft speed mounted radial clearance lubrication jacket cooling n1011hsrt6 n1011hs 55 90 18 16000 min-1 0 m grease no test conditions test bearing shaft speed mounted radial clearance lubrication jacket cooling n1011hsrt6 n1011hs 55 90 18 16000 min-1 0 m grease yes 20 10 temperature increase of outer ring °c 16 14 12 10 8 6 4 2 0 0 2000 4000 6000 8000 10000 -1 temperature increase of outer ring °c 18 9 8 7 6 5 4 3 2 1 0 12000 14000 16000 0 2000 4000 6000 8000 10000 12000 14000 16000 speed min 0 0.5 speed min-1 1.0 0 0.5 1.0 dmn value 106 dmn value 106 fig 10.6 high-speed test results grease lubrication without outer case cooling fig 10.7 high-speed test results grease lubrication with
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ntn main spindle bearings 229
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main spindle bearings double row cylindrical roller bearings d 110 300mm rbrrrbrrdd fw d d ew d d nnu type cylindrical bore tapered bore part number nnu type cylindrical tapered bore bore1 nn type cylindrical tapered bore bore1 nn4920k nn3020k nn3020hst6k nn3020hsrt6k nn4921k nn3021k nn3021hst6k nn3021hsrt6k nn4922k nn3022k nn3022hst6k nn3022hsrt6k nn4924k nn3024k nn3024hst6k nn3024hsrt6k nn4926k nn3026k nn3026hst6k nn3026hsrt6k nn4928k nn3028k nn3028hsk nn4930k nn3030k nn3030hsk nn4932k nn3032k nn3032hsk nn4934k nn3034k nn4936k nn3036k nn4938k nn3038k boundary dimensions mm d 100 100 100 100 105 105 105 105 110 110 110 110 120 120 120 120 130 130 130 130 140 140 140 150 150 150 160 160 160 170 170 180 180 190 190 d 140 150 150 150 145 160 160 160 150 170 170 170 165 180 180 180 180 200 200 200 190 210 210 210 225 225 220 240 240 230 260 250 280 260 290 b 40 37 37 37 40 41 41 41 40 45 45 45 45 46 46 46 50 52 52 52 50 53 53 60 56 56 60 60 60 60 67 69 74 69 75 rs min2 1.1 1.5 1.5 1.5 1.1
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main spindle bearings ra ra ra ra ra da dc da dd db da db db da db dynamic equivalent radial load pr=fr static equivalent radial load por=fr dimensions mm da fw 225 245 265 292 312 339 359 379 473 398 493 425 512 445 547 465 567 492 596 512 622 534 556 ew 261 282 281 310 301 330 336 364 356 384 391 418 411 438 min abutment and fillet dimensions mm db min dc max dd min da max 269 289 309 349 369 407 427 447 db max min ras max 2 2 2 2.5 2 2.5 2 3 2 3 2.5 3 2.5 3 2.5 4 2.5 4 3 4 3 4 3 4 3 5 3 5 4 4 mass kg approx nnu type nn type cylindrical tapered cylindrical tapered bore bore bore bore 14.7 15.9 17.2 29.6 31.6 48.6 51.4 54.2 57.0 84.5 88.2 92.0 127 132 156 162 14.0 15.2 16.4 28.3 30.2 46.4 49.1 51.7 102 54.4 107 80.6 113 84.1 146 87.7 154 121 178 126 202 149 155 195 172 148 141 109 103 98.5 14.0 21.6 15.2 29.3 16.4 32.8 28.3 47.4 30.2 51.1 46.4 70.8 49.0 76.2 13.3 20.8 14.5 28.2 15.6 31.6 27.0 45.8 28.8 49.3 44.2 68.6 46.7 73.5 internal free space cm3 nn type 437 649 485 877 518 973 8
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main spindle bearings r1a ra db da db dynamic equivalent radial load pr=fr static equivalent radial load por=fr da min 35 40 45 50 55 61.5 66.5 71.5 76.5 81.5 86.5 abutment and fillet dimensions mm db ras max min max r1as max mass internal cylindrical free space bore cm3 kg approx part number cylindrical bore n1006hs n1007hs n1008hs n1009hs n1010hs n1011hs n1012hs n1013hs n1014hs n1015hs n1016hs cylindrical bore n1006hsk n1007hsk n1008hsk n1009hsk n1010hsk n1011hsk n1012hsk n1013hsk n1014hsk n1015hsk n1016hsk 50 57 63 70 75 83.5 88.5 93.5 103.5 108.5 118.5 49 56 62 69 74 82 87 92 101 106 114 1 1 1 1 1 1 1 1 1 1 1 0.6 0.6 0.6 0.6 0.6 1 1 1 1 1 1 0.143 0.190 0.235 0.298 0.323 0.473 0.505 0.538 0.745 0.787 1.05 4.33 5.06 7.10 8.85 10.8 15.0 15.3 19.0 22.0 26.5 31.1 237
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main spindle bearings ultra high-speed single row cylindrical roller bearings ultage series d 55 100mm b r1 b r1 r ew d d ew d d part number 1 3 boundary dimensions basic load ratings dynamic static dynamic static kn kgf cr 24.1 23.8 25.3 29.2 38 48 50.5 cor 28.7 28.9 32 37.5 50 64.5 70.5 cr 2 460 2 430 2 580 2 980 3 900 4 900 5 150 cor 2 930 2 950 3 250 3 850 5 100 6 550 7 200 limiting speeds min-1 grease oil lubrication lubrication 15 400 14 400 13 600 12 400 11 000 9 700 9 000 30 900 28 900 27 200 24 700 21 900 19 500 18 000 cylindrical bore n1011hsr n1012hsr n1013hsr n1014hsr n1016hsr n1018hsr n1020hsr tapered bore n1011hsrk n1012hsrk n1013hsrk n1014hsrk n1016hsrk n1018hsrk n1020hsrk d 55 60 65 70 80 90 100 d 90 95 100 110 125 140 150 b 18 18 18 20 22 24 24 rs min2 1.1 1.1 1.1 1.1 1.1 1.5 1.5 r1s min2 ew 1 1 1 1 1 1.1 1.1 81 86.1 91 100 113 127 137 1 minimum allowable value for chamfer dimension r or r1 240
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main spindle bearings r r1a ra da db dynamic equivalent radial load pr=fr static equivalent radial load por=fr da min 61.5 66.5 71.5 76.5 86.5 98 108 abutment and fillet dimensions mm db ras max min max part number r1as max r2 min cylindrical bore n1011hsl n1012hsl n1013hsl n1014hsl n1016hsl n1018hsl n1020hsl cylindrical bore n1011hslk n1012hslk n1013hslk n1014hslk n1016hslk n1018hslk n1020hslk 83.5 88.5 93.5 103.5 118.5 132 142 82 87 92 101 114 129 139 1 1 1 1 1 1.5 1.5 1 1 1 1 1 1 1 8.5 8.5 8.5 10 10 10 10 243
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main spindle bearings !5 dimension table for mounted internal clearance adjustment gage part number applicable bearing boundary dimensions mm e d 101 107 114 120 131 138 145 156 161 175 185 195 204 210 220 235 250 275 285 305 320 width b 23 23 23 23 25 25 25 28 28 30 30 33 33 33 36 40 40 45 45 50 50 sbnn3007-2 sbnn3008-2 sbnn3009-2 sbnn3010-2 sbnn3011-2 sbnn3012-2 sbnn3013-2 sbnn3014-2 sbnn3015-2 sbnn3016-2 sbnn3017-2 sbnn3018-2 sbnn3019-2 sbnn3020-2 sbnn3021-2 sbnn3022-2 sbnn3024-2 sbnn3026-2 sbnn3028-2 sbnn3030-2 sbnn3032-2 n1007hsk n1008hsk n1009hsk n1010hsk n1011hsk n1012hsk n1013hsk n1014hsk n1015hsk n1016hsk n1017hsk n1018hsk n1019hsk n1020hsk n1021hsk n1022hsk n1024hsk n1026hsk n1028hsk n1030hsk n1032hsk nn3007k nn3008k nn3009k nn3010k nn3011k nn3012k nn3013k nn3014k nn3015k nn3016k nn3017k nn3018k nn3019k nn3020k nn3021k nn3022k nn3024k nn3026k nn3028k nn3030k nn3032k 55 61 67.5 72.5 81 86.1 91 100 105 113 118 127 132 137 146 155 165 182 192 206 219 245
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