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Needle bearings with guide ribs without inner ring

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Needle bearings without inner ring and with inner ring are the roller bearings for high loading with simple spatial construction. Needle rollers guided evenly to the axis in fix cage are made with tolerance diameter of 2 µm. Outer ring with ribs and a cage with needle rollers create the construction unit.

Needle bearings with ribs without inner ring are supplied in following design: NK, NKS, RNA 49, RNA 69

 

Needle bearings without inner ring allow optimal solution of the placing problem, whereby the raceway on the shaft may be hardened or grinded. Compared to the bearings with inner ring, it is possible to produce reinforced shafts and enhance the operation accuracy of the bearing as the tolerance of inner ring is eliminated. The shell circle of these needle bearings when not assembled is in the tolerance field of F6. The shell circle is a inner circle made by the needle rollers when they touch to the raceway of the outer ring without clearance. For lubrication purposes the bearings have a lubrication groove and opening, this does not apply for bearings NK F ≤ 10 mm.

 

Download the current general catalogue SK, EN, DE

Dimensions Bearing designation Basic load rating Fatigue load limit Limiting speed for lubrication with Mass
dynamic static
d D B rs Fw Cr Cor Cu grease oil
mm kN min-1 kg
5 10 10 0.15 5 NK5/10TV 2.1 1.8 0.214 26000 40000 0.004
5 10 12 0.15 5 NK5/12TV 2.9 2.7 0.329 26000 40000 0.004
6 12 10 0.15 6 NK6/10 2.6 2.2 0.268 22000 36000 0.005
6 12 12 0.15 6 NK6/12TN 3.4 3.1 0.384 22000 36000 0.006
7 14 10 0.3 7 NK7/10TN 2.9 2.7 0.329 20000 34000 0.007
7 14 12 0.3 7 NK7/12TN 3.7 3.6 0.439 20000 34000 0.009
8 15 12 0.3 8 NK8/12 4.0 4.1 0.500 19000 32000 0.011
8 15 16 0.3 8 NK8/16 5.6 5.8 0.707 19000 32000 0.013
9 16 12 0.3 9 NK9/12 4.9 5.0 0.603 18000 30000 0.012
9 16 16 0.3 9 NK9/16 6.5 7.1 0.865 18000 30000 0.015
10 17 12 0.3 10 NK10/12 5.2 5.5 0.670 17000 28000 0.013
10 17 16 0.3 10 NK10/16 5.6 7.4 0.896 17000 28000 0.016
12 19 12 0.3 12 NK12/12 5.7 6.6 0.798 16000 26000 0.013
12 19 16 0.3 12 NK12/16 8.2 9.8 1.195 16000 26000 0.018
14 22 13 0.3 14 R NA4900 8.2 9.2 1.115 16000 26000 0.018
14 22 16 0.3 14 NK14/16 11.0 13.7 1.670 16000 26000 0.023
14 22 20 0.3 14 NK14/20 13.2 17.3 2.109 16000 26000 0.028
15 23 16 0.3 15 NK15/16 10.8 13.7 1.670 16000 26000 0.024
15 23 20 0.3 15 NK15/20 13.2 17.3 2.109 16000 26000 0.031
16 24 13 0.3 16 R NA4901 9.0 11.0 1.341 15000 24000 0.020
16 24 16 0.3 16 NK16/16 11.4 15.0 1.829 15000 24000 0.025
16 24 20 0.3 16 NK16/20 13.7 19.0 2.317 15000 24000 0.032
16 24 22 0.3 16 R NA6901 14.3 20.0 2.439 15000 24000 0.036
17 25 16 0.3 17 NK17/16 12.0 16.0 1.951 15000 24000 0.027
17 25 20 0.3 17 NK17/20 15.0 19.0 2.317 15000 24000 0.034
18 26 16 0.3 18 NK18/16 12.0 16.3 1.987 15000 24000 0.028
18 26 20 0.3 18 NK18/20 14.3 20.4 2.487 15000 24000 0.035
19 27 16 0.3 19 NK19/16 13.0 17.0 2.073 14000 22000 0.037
19 27 20 0.3 19 NK19/20 15.0 22.0 2.682 14000 22000 0.039
20 28 13 0.3 20 R NA4902 11.0 12.9 1.573 13000 20000 0.023
20 28 16 0.3 20 NK20/16 12.5 17.6 2.146 13000 20000 0.032
20 28 20 0.3 20 NK20/20 15.6 23.6 2.878 13000 20000 0.038
20 28 23 0.3 20 R NA6902 16.6 25.5 3.109 13000 20000 0.042
20 32 20 0.6 20 NKS20 22.0 25.0 3.048 13000 20000 0.058
21 29 16 0.3 21 NK21/16 13.4 20.0 2.439 13000 20000 0.032
21 29 20 0.3 21 NK21/20 16.3 25.0 3.048 13000 20000 0.040
22 30 13 0.3 22 R NA4903 10.4 14.6 1.780 12000 19000 0.025
22 30 16 0.3 22 NK22/16 13.4 20.0 2.439 12000 19000 0.033
22 30 20 0.3 22 NK22/20 16.0 25.0 3.048 12000 19000 0.041
22 30 23 0.3 22 R NA6903 18.0 29.0 3.536 12000 19000 0.056
22 35 20 0.6 22 NKS22 20.8 25.5 3.109 12000 19000 0.069
24 32 16 0.3 24 NK24/16 14.3 22.4 2.731 10000 17000 0.035
24 32 20 0.3 24 NK24/20 17.3 28.5 3.475 10000 17000 0.045
24 37 20 0.6 24 NKS24 26.0 31.0 3.780 10000 17000 0.073
25 33 16 0.3 25 NK25/16 14.3 22.4 2.731 10000 17000 0.037
25 33 20 0.3 25 NK25/20 17.0 28.5 3.475 10000 17000 0.047
25 37 17 0.3 25 R NA4904 19.0 23.6 2.878 10000 17000 0.061
25 37 30 0.3 25 R NA6904 33.5 49.0 5.975 10000 17000 0.091
25 38 20 0.6 25 NKS25 25.8 31.0 3.780 10000 17000 0.076
26 34 16 0.3 26 NK26/16 14.6 23.6 2.878 9500 16000 0.039
26 34 20 0.3 26 NK26/20 17.6 30.0 3.658 9500 16000 0.048
28 37 20 0.3 28 NK28/20 20.0 32.0 3.902 9000 15000 0.057
28 37 30 0.3 28 NK28/30 26.5 52.0 6.341 9000 15000 0.088
28 39 17 0.3 28 R NA49/22 20.8 27.5 3.353 9000 15000 0.059
28 39 30 0.3 28 R NA69/22 40.8 51.0 6.219 9000 15000 0.107
28 42 20 0.6 28 NKS28 27.5 36.5 4.451 9000 15000 0.094
29 38 20 0.3 29 NK29/20 20.8 34.0 4.146 8500 14000 0.059
29 38 30 0.3 29 NK29/30 27.0 54.0 6.585 8500 14000 0.090
30 40 20 0.3 30 NK30/20 21.6 36.0 4.390 8500 14000 0.071
30 40 30 0.3 30 NK30/30 31.5 58.5 7.134 8500 14000 0.107
30 42 17 0.3 30 R NA4905 21.6 30.0 3.658 8500 14000 0.071
30 42 30 0.3 30 R NA6905 36.5 57.0 6.951 8500 14000 0.127
30 45 22 0.6 30 NKS30 31.0 40.5 4.939 8500 14000 0.114
32 42 20 0.3 32 NK32/20 22.0 37.5 4.573 8000 13000 0.074
32 42 30 0.3 32 NK32/30 32.5 62.0 7.560 8000 13000 0.122
32 45 17 0.3 32 R NA49/28 22.4 31.5 3.841 8000 13000 0.080
32 45 30 0.3 32 R NA69/28 40.0 60.0 7.317 8000 13000 0.140
32 47 22 0.6 32 NKS32 32.5 44.0 5.365 8000 13000 0.120
35 45 20 0.3 35 NK35/20 23.2 41.5 5.060 7500 12000 0.081
35 45 30 0.3 35 NK35/30 34.0 68.0 8.292 7500 12000 0.122
35 47 17 0.3 35 R NA4906 23.2 33.5 4.085 7500 12000 0.081
35 47 30 0.3 35 R NA6906 39.0 65.5 7.987 7500 12000 0.148
35 50 22 0.6 35 NKS35 34.0 47.5 5.792 7500 12000 0.130
37 47 20 0.3 37 NK37/20 23.6 43.5 5.304 7000 11000 0.084
37 47 30 0.3 37 NK37/30 34.5 71.0 8.658 7000 11000 0.128
37 52 22 0.6 37 NKS37 35.5 51.0 6.219 7000 11000 0.134
38 48 20 0.3 38 NK38/20 20.8 41.5 5.060 7000 11000 0.087
38 48 30 0.3 38 NK38/30 30.5 68.0 8.292 7000 11000 0.131
40 50 20 0.3 40 NK40/20 25.0 47.5 5.792 6700 10000 0.089
40 50 30 0.3 40 NK40/30 36.5 76.5 9.329 6700 10000 0.137
40 52 20 0.6 40 R NA49/32 28.5 46.5 5.670 6700 10000 0.100
40 52 36 0.6 40 R NA69/32 43.0 78.0 9.512 6700 10000 0.185
40 55 22 0.6 40 NKS40 36.5 54.0 6.585 6700 10000 0.140
42 52 20 0.3 42 NK42/20 25.5 49.0 5.764 6700 10000 0.085
42 52 30 0.3 42 NK42/30 37.5 80.0 9.756 6700 10000 0.141
42 55 20 0.6 42 R NA4907 29.0 49.0 5.975 6700 10000 0.114
42 55 36 0.6 42 R NA6907 44.0 83.0 10.121 6700 10000 0.218
43 53 20 0.3 43 NK43/20 25.7 51.0 6.219 6300 9500 0.096
43 53 30 0.3 43 NK43/30 38.0 83.0 10.121 6300 9500 0.134
43 58 22 0.6 43 NKS43 37.5 57.0 6.951 6300 9500 0.150
45 55 20 0.3 45 NK45/20 26.5 53.0 6.463 6300 9500 0.100
45 55 30 0.3 45 NK45/30 39.0 86.5 10.548 6300 9500 0.151
45 60 22 0.6 45 NKS45 39.0 61.0 7.439 6300 9500 0.156
47 57 20 0.3 47 NK47/20 27.0 55.0 6.707 6000 9000 0.104
47 57 30 0.3 47 NK47/30 39.0 90.0 10.975 6000 9000 0.158
48 62 22 0.6 48 R NA4908 40.0 64.0 7.804 5600 8500 0.154
48 62 40 0.6 48 R NA6908 64.0 118.0 14.390 5600 8500 0.300
50 62 25 0.6 50 NK50/25 37.5 76.5 9.329 5600 8500 0.171
50 62 35 0.6 50 NK50/35 51.0 114.0 13.902 5600 8500 0.242
50 65 22 1.0 50 NKS50 41.5 68.0 8.292 5600 8500 0.170
52 68 22 0.6 52 R NA4909 41.5 69.5 8.475 5300 8000 0.201
52 68 40 0.6 52 R NA6909 65.5 125.0 15.243 5300 8000 0.392
55 68 25 0.6 55 NK55/25 41.5 81.5 5.060 5000 7500 0.207
55 68 35 0.6 55 NK55/35 57.0 122.0 14.878 5000 7500 0.293
55 72 22 1.0 55 NKS55 42.5 72.0 8.780 5000 7500 0.225
58 72 22 0.6 58 R NA4910 43.0 76.5 9.329 4800 7000 0.179
58 72 40 0.6 58 R NA6910 67.0 132.0 16.097 4800 7000 0.364
60 72 25 0.6 60 NK60/25 40.0 88.0 10.731 4800 7000 0.202
60 72 35 0.6 60 NK60/35 55.0 132.0 16.097 4800 7000 0.286
60 80 28 1.1 60 NKS60 60.0 98.0 11.951 4800 7000 0.337
63 80 25 1.0 63 R NA4911 56.0 99.6 12.146 4500 6700 0.285
63 80 45 1.0 63 R NA6911 83.0 160.0 19.512 4500 6700 0.540
65 78 25 0.6 65 NK65/25 43.0 91.5 11.158 4300 6300 0.257
65 78 35 0.6 65 NK65/35 60.0 137.0 16.707 4300 6300 0.300
65 85 28 1.1 65 NKS65 64.0 108.0 13.170 4300 6300 0.362
68 82 25 0.6 68 NK68/25 43.5 95.0 11.585 4000 6000 0.287
68 82 35 0.6 68 NK68/35 60.0 143.0 17.439 4000 6000 0.350
68 85 25 1.0 68 R NA4912 58.5 108.0 13.170 4000 6000 0.304
68 85 45 1.0 68 R NA6912 71.0 176.0 21.463 4000 6000 0.570
70 85 25 0.6 70 NK70/25 41.5 90.5 11.036 4000 6000 0.298
70 85 35 0.6 70 NK70/35 58.5 140.0 17.073 4000 6000 0.411
70 90 28 1.1 70 NKS70 65.5 114.0 13.902 4000 6000 0.383
72 90 25 1.0 72 R NA4913 58.5 114.0 13.902 4000 6000 0.346
72 90 45 1.0 72 R NA6913 95.0 196.0 23.902 4000 6000 0.679
73 90 25 0.6 73 NK73/25 95.0 112.0 13.658 3800 5600 0.320
73 90 35 0.6 73 NK73/35 75.0 166.0 20.243 3800 5600 0.450
75 92 25 0.6 75 NK75/25 41.5 91.5 11.158 3800 5600 0.364
75 92 23 0.6 75 NK75/35 58.5 143.0 17.439 3800 5600 0.518
75 95 28 1.1 75 NKS75 69.5 125.0 15.243 3800 5600 0.413
80 95 25 1.0 80 NK80/25 58.5 122.0 14.878 3600 5300 0.331
80 95 35 1.0 80 NK80/35 72.0 176.0 21.463 3600 5300 0.380
80 100 30 1.0 80 R NA4914 78.0 150.0 18.292 3600 5300 0.502
80 100 54 1.0 80 R NA6914 125.0 270.0 32.926 3600 5300 0.946
85 105 25 1.0 85 NK85/25 69.0 129.0 15.731 3400 5000 0.400
85 105 30 1.0 85 R NA4915 80.0 156.0 19.024 3400 5000 0.528
85 105 35 1.0 85 NK85/35 98.0 208.0 25.365 3400 5000 0.712
85 105 54 1.0 85 R NA6915 129.0 290.0 35.365 3400 5000 1.020
90 110 25 1.0 90 NK90/25 72.0 140.0 17.073 3000 4500 0.530
90 110 30 1.0 90 R NA4916 83.0 170.0 20.731 3000 4500 0.556
90 110 35 1.0 90 NK90/35 102.0 220.0 26.829 3000 4500 0.620
90 110 54 1.0 90 R NA6916 118.0 320.0 39.024 3000 4500 1.050
95 115 26 1.0 95 NK95/26 46.5 116.0 14.146 3000 4500 0.572
95 115 36 1.0 95 NK95/36 104.0 228.0 27.804 3000 4500 0.640
100 120 26 1.0 100 NK100/26 75.0 153.0 18.334 2800 4300 0.480
100 120 35 1.1 100 R NA4917 100.0 220.0 26.346 2800 4300 0.715
100 120 36 1.1 100 NK100/36 108.0 245.0 29.340 2800 4300 0.658
100 120 63 1.1 100 R NA6917 143.0 415.0 49.698 2800 4300 1.150
105 125 26 1.0 105 NK105/26 50.0 129.0 15.448 2600 4000 0.625
105 125 35 1.1 105 R NA4918 104.0 236.0 28.262 2600 4000 0.746
105 125 36 1.0 105 NK105/36 69.5 196.0 23.472 2600 4000 0.870
105 125 63 1.1 105 R NA6918 160.0 405.0 48.501 2600 4000 1.300
110 130 30 1.1 110 NK110/30 93.0 208.0 24.909 2400 3800 0.600
110 130 35 1.1 110 R NA4919 106.0 245.0 29.340 2400 3800 0.777
110 130 40 1.1 110 NK110/40 122.0 290.0 34.729 2400 3800 0.900
110 130 63 1.1 110 R NA6919 150.0 455.0 54.489 2400 3800 1.470
115 140 40 1.1 115 R NA4920 127.0 285.0 34.130 2200 3600 1.220
125 150 40 1.1 125 R NA4922 134.0 315.0 51.640 2000 3400 1.320