c ontents technical data ntn precision rolling bearings main spindle bearings ball screw support bearings ntn products appendix global network
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technical data 4 elastic deformation of spacer by table 6.2 nut tightening force bearing bore diameter nut tightening force front cover drive-up mm n mm 20 25 2940 4900 30 35 40 4900 9800 45 50 55 60 65 9800 14700 70 75 80 85 90 95 100 14700 24500 0.01 0.02 105 110 120 130 140 150 160 170 24500 34300 180 190 200 220 240 260 34300 44100 280 300 note 1 ntn has specified the nut tightening forces in this table based on experiences from reviewing and assessing the drawings from users however ntn has no production record for bore diameter of 220 mm or larger thus the nut tightening forces in parentheses are estimated values note 2 when the fitting amount between a shaft and an inner ring is large the tightening force needed is about twice as large as the calculated press-fitting force of the inner ring tightening force when incorporating a bearing into a main spindle the bearing must be correctly forced into a predetermined position and maintained with a predetermined bearing pressure in or
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ntn main spindle bearings table 9.6 standard angular contact ball bearings 79 series nominal bore diameter d 10 12 15 17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 contact angle 15° contact angle 25° contact angle 30° unit n 79xxu/5s-79xxu light preload gl normal preload medium preload gn gm 79xxuc/5s-79xxuc light preload gl normal preload medium preload gn gm 79xxuad/5s-79xxuad light preload gl normal preload medium preload gn gm 20 20 20 29 29 39 39 39 39 39 59 59 59 78 88 88 108 108 108 137 167 20 20 29 29 49 49 49 78 88 108 118 118 127 127 177 177 186 245 255 255 325 335 335 410 510 79xxc 39 39 59 69 88 98 108 167 177 216 226 236 245 245 365 365 365 490 500 510 655 655 665 835 1 020 20 20 20 20 39 39 49 49 59 59 59 88 88 88 118 118 118 157 157 157 196 235 29 29 49 49 69 78 78 127 137 167 177 186 196 196 284 284 284 390 390 400 510 520 530 655 800 59 69 98 98 147 157 167 255 275 345 355 375 380 390 560 570 580 770 780 795 1 020 1 040 1 060 1 300 1 600 20 20
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main spindle bearings standard angular contact ball bearings steel ball type 72 series contact angle 15° d 10 130mm brrdd1 r1 r d d1 d2 a part number boundary dimensions mm d d 30 32 35 40 47 52 62 72 80 85 90 100 110 120 125 130 140 150 160 170 180 190 200 215 230 b 9 10 11 12 14 15 16 17 18 19 20 21 22 23 24 25 26 28 30 32 34 36 38 40 40 rs min1 r1s min1 0.6 0.6 0.6 0.6 1 1 1 1.1 1.1 1.1 1.1 1.5 1.5 1.5 1.5 1.5 2 2 2 2.1 2.1 2.1 2.1 2.1 3 0.3 0.3 0.3 0.3 0.6 0.6 0.6 0.6 0.6 0.6 0.6 1 1 1 1 1 1 1 1 1.1 1.1 1.1 1.1 1.1 1.1 basic load ratings dynamic static dynamic static kn kgf cr 5.40 7.10 9.00 11.2 14.6 16.6 23.0 30.5 36.5 41.0 43.0 53.0 64.0 70.0 76.0 79.5 93.0 104 123 139 149 162 176 199 213 cor 2.64 3.45 4.50 5.75 8.15 10.2 14.7 19.9 25.2 28.8 31.5 40.0 49.5 55.0 60.0 65.5 77.5 90.5 105 120 127 143 160 192 214 cr 555 720 915 1 140 1 490 1 690 2 350 3 100 3 700 4 150 4 350 5 400 6 550 7 100 7 750 8 100 9 450 10 600 12 500 14 200 15 200 16 600 17 900 20 200 21 700 cor 269 355 460 59
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main spindle bearings high-speed angular contact ball bearings ceramic ball type 5s-2la-hse0 series contact angle 15° d 50 170mm b r r1 r1 r d d1 d2 d d1 d2 a part number boundary dimensions mm d d 80 90 95 100 110 115 125 130 140 145 150 160 170 180 200 210 225 240 260 b 16 18 18 18 20 20 22 22 24 24 24 26 28 28 33 33 35 38 42 rs min1 r1s min1 1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.5 1.5 1.5 2 2 2 2 2 2.1 2.1 2.1 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 1 1 1 1 1 1 1 1 1.1 1.1 1.1 basic load ratings dynamic static dynamic static kn kgf cr 15.9 17.3 18.1 18.4 22.5 23.9 27.4 27.7 32.0 32.5 33.5 38.5 48.0 48.0 69.0 71.5 73.5 86.0 99.0 cor 7.90 9.40 10.4 10.9 13.8 15.5 17.8 18.6 21.8 22.7 24.4 28.2 34.0 35.5 49.5 53.5 57.5 67.0 77.0 cr 1 620 1 760 1 850 1 870 2 290 2 440 2 790 2 830 3 300 3 300 3 450 3 950 4 900 4 900 7 050 7 300 7 500 8 800 10 100 cor 805 960 1 060 1 120 1 410 1 590 1 820 1 900 2 220 2 310 2 480 2 880 3 500 3 650 5 000 5 450 5 850 6 850 7 850 static axial load capacity kn kgf factor lim
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main spindle bearings l r1as ras dynamic equivalent radial load pr e 0.68 xfr yfa single row tandem back-to-back face-to-face fa fr e fa fr e fa fr e fa fr exyxyxyxy 1 0 0.41 0.87 1 0.92 0.67 1.41 da db static equivalent radial load por single row tandem xo yo xo fr yo fa back-to-back face-to-face xo yo 0.5 0.38 1 0.76 when por fr with single-row or tandem f r arrangement por load center mm a 23.3 26.0 27.2 28.3 31.1 32.3 35.0 36.2 39.0 40.1 41.3 mass kg single-row approx reference dimensions abutment and fillet dimensions mm da db max part number r1as max d1 61.6 68.6 73.6 78.6 85.6 90.6 97.6 102.6 109.8 114.8 119.8 d2 70.9 79.2 84.2 89.2 97.5 102.5 110.8 115.8 124.2 129.2 134.2 min l2 min 0.27 0.40 0.43 0.46 0.64 0.68 0.91 0.95 1.25 1.30 1.36 55.5 62 67 72 77 82 87 92 98.5 103.5 108.5 75.5 85.5 90.5 95.5 105.5 110.5 120.5 125.5 134.5 139.5 144.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 1 1 1 8.5 8.5 8.5 9 9 9 9 9 9 9 9 5s-2la-hsfl010ad 5s-2la-hsfl011ad 5s-2la-hsfl012ad 5s-2la-hsfl013ad 5
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main spindle bearings ras ras ras r1as dynamic equivalent radial load pr e single row tandem fa fr e fa fr exyxy xfr yfa da da db da back-to-back face-to-face fa fr e fa fr exyxy 0.57 1 0 0.43 1 1 1.09 0.7 1.63 static equivalent radial load por single row tandem xo yo xo fr yo fa back-to-back face-to-face xo yo 0.5 0.42 1 0.84 back-to-back db load center mm a 17.2 18.9 19.8 20.7 23.6 24.5 25.4 27.8 28.7 29.6 32.0 mass kg single-row approx face-to-face df reference dimensions when por fr with single-row or tandem f r arrangement por abutment and fillet dimensions mm da max part number r1as max da d1 56.9 62.6 67.6 72.6 79.2 84.2 89.2 96.0 100.9 105.9 111.9 d2 56.0 61.7 66.7 71.7 78.3 83.3 88.3 95.0 100.0 105.0 110.9 d1 65.0 72.1 77.1 82.1 90.2 95.2 100.2 108.6 113.6 118.6 127.3 min db min ras max 0.6 1 1 1 1 1 1 1 1 1 1 0.14 0.18 0.20 0.21 0.36 0.37 0.39 0.57 0.59 0.62 0.82 54.5 60.5 65.5 70.5 75.5 80.5 85.5 92 97 102 107 52.5 59.5 64.5 69.5 74.5 79.5 84.5 89.5 94.5 99.5 104.5 67.5
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ntn main spindle bearings !0 ultra high-speed single row cylindrical roller bearings n10hsrt6 type n10hsrt6 type cylindrical roller bearings have been designed for high-speed operation bearing specification features 1 optimized internal design allows high speed operation and limits temperature increase 2 special resin cage is suitable for high-speed operation fig 10.3 n10hsrt6 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 n10hsrt6 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 simplified main spindle configuration adoption of simplified lubrication system due to an optimized internal structure the n10hsr type bearings can reliably run at a higher speed with grea
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main spindle bearings double-direction angular contact thrust ball bearings 5620 series contact angle 60° d 25 320mm t1 c r1 r j d ew d part number boundary dimensions d small large size size 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200 220 240 260 280 300 320 27 32 37 42 47 52 57 62 67 73 78 83 88 93 98 104 109 114 124 134 144 155 165 175 186 196 207 227 247 269 289 310 330 mm d 47 55 62 68 75 80 90 95 100 110 115 125 130 140 145 150 160 170 180 200 210 225 240 260 280 290 310 340 360 400 420 460 480 t1 28 32 34 36 38 38 44 44 44 48 48 54 54 60 60 60 66 72 72 84 84 90 96 108 120 120 132 144 144 164 164 190 190 c 14 16 17 18 19 19 22 22 22 24 24 27 27 30 30 30 33 36 36 42 42 45 48 54 60 60 66 72 72 82 82 95 95 rs min1 r1s min1 0.6 1 1 1 1 1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.5 1.5 1.5 2 2 2 2 2 2.1 2.1 2.1 2.1 2.1 2.1 3 3 4 4 4 4 0.3 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 1 1 1 1 1 1 1 1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.5 1.5 1.5 1.5
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ntn ball screw support bearings 7 shaft and housing fits recommended fit and tolerances of shaft and housing shoulder squareness are shown in figs 13.13 and 13.14 table 13.13 shaft and housing fits fit type code shaft outside diameter bst ht axn arn h5 j5 housing h6 j6 table 13.14 tolerance of shoulder squareness unit diameter classification mm over incl 30 80 120 30 80 120 180 type code bst 4 4 5 ht 4 4 axn 4 5 6 7 arn 8 applications the bst type is mainly installed on ball screws of machine tool feed systems and two to four row arrangements are used in many cases this type is popular because greased sealed angular contact ball bearings are easy to handle the back-to-back duplex arrangement is commonly used because it allows acquisition of the specified preload by tightening the inner ring the face-to-face duplex arrangement may be used if more precise alignment is required it is not commonly used for machine tools examples of bearing arrangement are shown in figs 13.16 and 13.17 fig
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appendix table 12 greek alphabet list upright upper case italic reading upper case lower case alpha beta gamma delta epsilon zeta eta theta iota kappa lambda mu nu xi omicron pi rho sigma tau upsolon phi khi psi omega 323
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