AOSN / Roller Bearings

NK Series Machined Needle Roller Bearings

Needle roller bearings without an inner ring, for suitable shaft raceways.

Machined Needle Roller Bearings

Product Dimensions

NA, NK, NKI, RNA, NAV and RNAV in one catalogue.

Dimensions in mm. d: inner-ring bore diameter. Fw: diameter under the needle rollers (F for bearings with an inner ring). B/C: bearing width. Sorted by d or Fw, then outside diameter and width. Product images show representative constructions.

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Model	d (mm)	Fw / F (mm)	D (mm)	B / C (mm)	Inner ring	Construction	Weight (g)
NK 5/10 TN	—	5	10	10	No	Caged	3.1
NK 5/12 TN	—	5	10	12	No	Caged	3.7
NKI 5/12 TN	5	8	15	12	Yes	Caged	11.5
NKI 5/16 TN	5	8	15	16	Yes	Caged	15.3
NK 6/10 TN	—	6	12	10	No	Caged	4.7
NK 6/12 TN	—	6	12	12	No	Caged	5.7
NKI 6/12 TN	6	9	16	12	Yes	Caged	13.5
NKI 6/16 TN	6	9	16	16	Yes	Caged	17.4
NK 7/10 TN	—	7	14	10	No	Caged	6.9
NK 7/12 TN	—	7	14	12	No	Caged	8.2
NKI 7/12 TN	7	10	17	12	Yes	Caged	13.7
NKI 7/16 TN	7	10	17	16	Yes	Caged	18.2
NK 8/12 TN	—	8	15	12	No	Caged	8.7
NK 8/16 TN	—	8	15	16	No	Caged	12
NK 9/12 TN	—	9	16	12	No	Caged	10.3
NK 9/16 TN	—	9	16	16	No	Caged	12.8
NKI 9/12	9	12	19	12	Yes	Caged	16.6
NKI 9/16	9	12	19	16	Yes	Caged	21.9
NK 10/12 TN	—	10	17	12	No	Caged	10.1
NK 10/16 TN	—	10	17	16	No	Caged	13.3
NA 4900	10	14	22	13	Yes	Caged	23
NA 4900 2RS	10	—	22	14	Yes	Caged	25
NKI 10/16	10	14	22	16	Yes	Caged	29.4
NKI 10/20	10	14	22	20	Yes	Caged	37.1
NK 12/12	—	12	19	12	No	Caged	12.1
NK 12/16	—	12	19	16	No	Caged	15.9
NA 4901	12	16	24	13	Yes	Caged	26
NA 4901 2RS	12	—	24	14	Yes	Caged	28
NKI 12/16	12	16	24	16	Yes	Caged	33.3
NKI 12/20	12	16	24	20	Yes	Caged	41.9
NA 6901	12	16	24	22	Yes	Caged	46
RNA 4900	—	14	22	13	No	Caged	16.5
RNA 4900 2RS	—	14	22	13	No	Caged	16
NK 14/16	—	14	22	16	No	Caged	20.7
NK 14/20	—	14	22	20	No	Caged	25.5
NK 15/16	—	15	23	16	No	Caged	21.8
NK 15/20	—	15	23	20	No	Caged	26.6
NKI 15/16	15	19	27	16	Yes	Caged	38.8
NKI 15/20	15	19	27	20	Yes	Caged	48.7
NA 4902	15	20	28	13	Yes	Caged	34
NA 4902 2RS	15	—	28	14	Yes	Caged	37
NA 6902	15	20	28	23	Yes	Caged	63.6
NAV4002	15	—	32	17	Yes	Full complement	76
RNA 4901	—	16	24	13	No	Caged	17.4
RNA 4901 2RS	—	16	24	13	No	Caged	18
NK 16/16	—	16	24	16	No	Caged	22.4
NK 16/20	—	16	24	20	No	Caged	28.4
RNA 6901	—	16	24	22	No	Caged	31
NK 17/16	—	17	25	16	No	Caged	23.7
NK 17/20	—	17	25	20	No	Caged	29.8
NKI 17/16	17	21	29	16	Yes	Caged	42.4
NKI 17/20	17	21	29	20	Yes	Caged	53.4
NA 4903	17	22	30	13	Yes	Caged	37
NA 4903 2RS	17	—	30	14	Yes	Caged	40
NA 6903	17	22	30	23	Yes	Caged	72
NAV4003	17	—	35	18	Yes	Full complement	94
NK 18/16	—	18	26	16	No	Caged	24.9
NK 18/20	—	18	26	20	No	Caged	31.4
NK 19/16	—	19	27	16	No	Caged	26.1
NK 19/20	—	19	27	20	No	Caged	32.2
RNA 4902	—	20	28	13	No	Caged	21.7
RNA 4902 2RS	—	20	28	13	No	Caged	22
NK 20/16	—	20	28	16	No	Caged	27
NK 20/20	—	20	28	20	No	Caged	33.9
RNA 6902	—	20	28	23	No	Caged	39.7
NKI 20/16	20	24	32	16	Yes	Caged	49
NKI 20/20	20	24	32	20	Yes	Caged	61
NA 4904	20	25	37	17	Yes	Caged	75.2
NA 4904 2RS	20	—	37	18	Yes	Caged	80
NA 6904	20	25	37	30	Yes	Caged	141
NAV4004	20	—	42	22	Yes	Full complement	170
NK 21/16	—	21	29	16	No	Caged	28.1
NK 21/20	—	21	29	20	No	Caged	35.2
RNAV4002	—	21.87	32	17	No	Full complement	45
RNA 4903	—	22	30	13	No	Caged	22.2
NK 22/16	—	22	30	16	No	Caged	30
NK 22/20	—	22	30	20	No	Caged	37
RNA 6903	—	22	30	23	No	Caged	42.4
NKI 22/16	22	26	34	16	Yes	Caged	52
NKI 22/20	22	26	34	20	Yes	Caged	65.4
NA 49/22	22	28	39	17	Yes	Caged	80
NA 69/22	22	28	39	30	Yes	Caged	150
NK 24/16	—	24	32	16	No	Caged	31.9
NK 24/20	—	24	32	20	No	Caged	40
RNAV4003	—	24.3	35	18	No	Full complement	62
NK 25/16	—	25	33	16	No	Caged	32.6
NK 25/20	—	25	33	20	No	Caged	42
RNA 4904	—	25	37	17	No	Caged	52.3
RNA 6904	—	25	37	30	No	Caged	100
NKI 25/20	25	29	38	20	Yes	Caged	79.4
NKI 25/30	25	29	38	30	Yes	Caged	124
NA 4905	25	30	42	17	Yes	Caged	88
NA 4905 2RS	25	—	42	18	Yes	Caged	90
NA 6905	25	30	42	30	Yes	Caged	161
NAV4005	25	—	47	22	Yes	Full complement	195
NK 26/16	—	26	34	16	No	Caged	34
NK 26/20	—	26	34	20	No	Caged	42
NK 28/20	—	28	37	20	No	Caged	52.2
NK 28/30	—	28	37	30	No	Caged	82
RNA 49/22	—	28	39	17	No	Caged	50.2
RNA 69/22	—	28	39	30	No	Caged	98
NKI 28/20	28	32	42	20	Yes	Caged	96.5
NKI 28/30	28	32	42	30	Yes	Caged	146
NA 49/28	28	32	45	17	Yes	Caged	97.7
NA 69/28	28	32	45	30	Yes	Caged	182
RNAV4004	—	28.7	42	22	No	Full complement	114
NK 29/20	—	29	38	20	No	Caged	53.7
NK 29/30	—	29	38	30	No	Caged	84.3
NK 30/20	—	30	40	20	No	Caged	65
NK 30/30	—	30	40	30	No	Caged	97.9
RNA 4905	—	30	42	17	No	Caged	61
RNA 6905	—	30	42	30	No	Caged	112
NKI 30/20	30	35	45	20	Yes	Caged	112
NKI 30/30	30	35	45	30	Yes	Caged	170
NA 4906	30	35	47	17	Yes	Caged	101
NA 4906 2RS	30	—	47	18	Yes	Caged	100
NA 6906	30	35	47	30	Yes	Caged	192
NAV4006	30	—	55	25	Yes	Full complement	299
NK 32/20	—	32	42	20	No	Caged	68
NK 32/30	—	32	42	30	No	Caged	102
RNA 49/28	—	32	45	17	No	Caged	73.2
RNA 69/28	—	32	45	30	No	Caged	135
NKI 32/20	32	37	47	20	Yes	Caged	118
NKI 32/30	32	37	47	30	Yes	Caged	180
NA 49/32	32	40	52	20	Yes	Caged	158
NA 69/32	32	40	52	36	Yes	Caged	288
RNAV4005	—	33.5	47	22	No	Full complement	129
NK 35/20	—	35	45	20	No	Caged	73.8
NK 35/30	—	35	45	30	No	Caged	112
RNA 4906	—	35	47	17	No	Caged	69.4
RNA 6906	—	35	47	30	No	Caged	126
NKI 35/20	35	40	50	20	Yes	Caged	127
NKI 35/30	35	40	50	30	Yes	Caged	193
NA 4907	35	42	55	20	Yes	Caged	170
NA 4907 2RS	35	—	55	21	Yes	Caged	180
NA 6907	35	42	55	36	Yes	Caged	310
NAV4007	35	—	62	27	Yes	Full complement	402
NK 37/20	—	37	47	20	No	Caged	77
NK 37/30	—	37	47	30	No	Caged	113
NK 38/20	—	38	48	20	No	Caged	79.4
NK 38/30	—	38	48	30	No	Caged	116
NKI 38/20	38	43	53	20	Yes	Caged	136
NKI 38/30	38	43	53	30	Yes	Caged	207
NK 40/20	—	40	50	20	No	Caged	82.7
NK 40/30	—	40	50	30	No	Caged	125
RNA 49/32	—	40	52	20	No	Caged	89.1
RNA 69/32	—	40	52	36	No	Caged	162
NKI 40/20	40	45	55	20	Yes	Caged	142
NKI 40/30	40	45	55	30	Yes	Caged	216
NA 4908	40	48	62	22	Yes	Caged	230
NA 4908 2RS	40	—	62	23	Yes	Caged	250
NA 6908	40	48	62	40	Yes	Caged	430
NAV4008	40	—	68	28	Yes	Full complement	482
RNAV4006	—	40.1	55	25	No	Full complement	193
NK 42/20	—	42	52	20	No	Caged	85.8
NK 42/30	—	42	52	30	No	Caged	130
RNA 4907	—	42	55	20	No	Caged	107
RNA 6907	—	42	55	36	No	Caged	193
NKI 42/20	42	47	57	20	Yes	Caged	148
NKI 42/30	42	47	57	30	Yes	Caged	222
NK 43/20	—	43	53	20	No	Caged	86
NK 43/30	—	43	53	30	No	Caged	133
NK 45/20	—	45	55	20	No	Caged	91.5
NK 45/30	—	45	55	30	No	Caged	139
NKI 45/25	45	50	62	25	Yes	Caged	229
NKI 45/35	45	50	62	35	Yes	Caged	322
NA 4909	45	52	68	22	Yes	Caged	271
NA 4909 2RS	45	—	68	23	Yes	Caged	290
NA 6909	45	52	68	40	Yes	Caged	495
NAV4009	45	—	75	30	Yes	Full complement	617
RNAV4007	—	45.9	62	27	No	Full complement	259
NK 47/20	—	47	57	20	No	Caged	94.5
NK 47/30	—	47	57	30	No	Caged	142
RNA 4908	—	48	62	22	No	Caged	140
RNA 6908	—	48	62	40	No	Caged	256
NK 50/25	—	50	62	25	No	Caged	158
NK 50/35	—	50	62	35	No	Caged	221
NKI 50/25	50	55	68	25	Yes	Caged	270
NKI 50/35	50	55	68	35	Yes	Caged	379
NA 4910	50	58	72	22	Yes	Caged	274
NA 4910 2RS	50	—	72	23	Yes	Caged	300
NA 6910	50	58	72	40	Yes	Caged	515
NAV4010	50	—	80	30	Yes	Full complement	669
RNAV4008	—	51.6	68	28	No	Full complement	304
RNA 4909	—	52	68	22	No	Caged	182
RNA 6909	—	52	68	40	No	Caged	338
NK 55/25	—	55	68	25	No	Caged	180
NK 55/35	—	55	68	35	No	Caged	250
NKI 55/25	55	60	72	25	Yes	Caged	272
NKI 55/35	55	60	72	35	Yes	Caged	379
NA 4911	55	63	80	25	Yes	Caged	393
NA 6911	55	63	80	45	Yes	Caged	780
NAV4011	55	—	90	35	Yes	Full complement	1030
RNAV4009	—	57.4	75	30	No	Full complement	390
RNA 4910	—	58	72	22	No	Caged	163
RNA 6910	—	58	72	40	No	Caged	310
NK 60/25	—	60	72	25	No	Caged	185
NK 60/35	—	60	72	35	No	Caged	258
NKI 60/25	60	68	82	25	Yes	Caged	394
NKI 60/35	60	68	82	35	Yes	Caged	553
NA 4912	60	68	85	25	Yes	Caged	426
NA 6912	60	68	85	45	Yes	Caged	808
NAV4012	60	—	95	35	Yes	Full complement	1087
RNAV4010	—	62.1	80	30	No	Full complement	426
RNA 4911	—	63	80	25	No	Caged	255
RNA 6911	—	63	80	45	No	Caged	470
NK 65/25	—	65	78	25	No	Caged	221
NK 65/35	—	65	78	35	No	Caged	310
NA 4913	65	72	90	25	Yes	Caged	456
NKI 65/25	65	73	90	25	Yes	Caged	467
NKI 65/35	65	73	90	35	Yes	Caged	659
NA 6913	65	72	90	45	Yes	Caged	833
NAV4013	65	—	100	35	Yes	Full complement	1156
NK 68/25	—	68	82	25	No	Caged	241
NK 68/35	—	68	82	35	No	Caged	338
RNA 4912	—	68	85	25	No	Caged	275
RNA 6912	—	68	85	45	No	Caged	488
RNAV4011	—	69.8	90	35	No	Full complement	645
NK 70/25	—	70	85	25	No	Caged	260
NK 70/35	—	70	85	35	No	Caged	370
NKI 70/25	70	80	95	25	Yes	Caged	521
NKI 70/35	70	80	95	35	Yes	Caged	737
NA 4914	70	80	100	30	Yes	Caged	728
NA 6914	70	80	100	54	Yes	Caged	1340
NAV4014	70	—	110	40	Yes	Full complement	1666
RNA 4913	—	72	90	25	No	Caged	312
RNA 6913	—	72	90	45	No	Caged	580
NK 73/25	—	73	90	25	No	Caged	302
NK 73/35	—	73	90	35	No	Caged	428
RNAV4012	—	74.6	95	35	No	Full complement	677
NK 75/25	—	75	92	25	No	Caged	315
NK 75/35	—	75	92	35	No	Caged	445
NKI 75/25	75	85	105	25	Yes	Caged	641
NA 4915	75	85	105	30	Yes	Caged	775
NKI 75/35	75	85	105	35	Yes	Caged	908
NA 6915	75	85	105	54	Yes	Caged	1450
NAV4015	75	—	115	45	Yes	Full complement	1762
NK 80/25	—	80	95	25	No	Caged	301
NK 80/35	—	80	95	35	No	Caged	425
RNA 4914	—	80	100	30	No	Caged	460
RNA 6914	—	80	100	54	No	Caged	857
NKI 80/25	80	90	110	25	Yes	Caged	677
NA 4916	80	90	110	30	Yes	Caged	878
NKI 80/35	80	90	110	35	Yes	Caged	959
NA 6916	80	90	110	54	Yes	Caged	1522
NAV4016	80	—	125	45	Yes	Full complement	2450
RNAV4013	—	80.3	100	35	No	Full complement	692
NK 85/25	—	85	105	25	No	Caged	425
RNA 4915	—	85	105	30	No	Caged	489
NK 85/35	—	85	105	35	No	Caged	600
RNA 6915	—	85	105	54	No	Caged	935
NKI 85/26	85	95	115	26	Yes	Caged	743
NKI 85/36	85	95	115	36	Yes	Caged	1040
NA 4917	85	100	120	35	Yes	Caged	1250
NA 6917	85	100	120	63	Yes	Caged	2200
NAV4017	85	—	130	45	Yes	Full complement	2500
RNAV4014	—	88	110	40	No	Full complement	950
NK 90/25	—	90	110	25	No	Caged	450
RNA 4916	—	90	110	30	No	Caged	516
NK 90/35	—	90	110	35	No	Caged	630
RNA 6916	—	90	110	54	No	Caged	987
NKI 90/26	90	100	120	26	Yes	Caged	778
NKI 90/36	90	100	120	36	Yes	Caged	1090
NA 4918	90	105	125	35	Yes	Caged	1312
NA 6918	90	105	125	63	Yes	Caged	2310
RNAV4015	—	92.7	115	45	No	Full complement	1000
NK 95/26	—	95	115	26	No	Caged	490
NK 95/36	—	95	115	36	No	Caged	680
NKI 95/26	95	105	125	26	Yes	Caged	816
NKI 95/36	95	105	125	36	Yes	Caged	1145
NA 4919	95	110	130	35	Yes	Caged	1371
NA 6919	95	110	130	63	Yes	Caged	2500
NK 100/26	—	100	120	26	No	Caged	515
RNA 4917	—	100	120	35	No	Caged	657
NK 100/36	—	100	120	36	No	Caged	715
RNA 6917	—	100	120	63	No	Caged	1200
NKI 100/30	100	110	130	30	Yes	Caged	990
NKI 100/40	100	110	130	40	Yes	Caged	1330
NA 4920	100	115	140	40	Yes	Caged	1900
RNAV4016	—	100.3	125	45	No	Full complement	1400
RNAV4017	—	104.8	130	45	No	Full complement	1540
NK 105/26	—	105	125	26	No	Caged	540
RNA 4918	—	105	125	35	No	Caged	745
NK 105/36	—	105	125	36	No	Caged	713
RNA 6918	—	105	125	63	No	Caged	1330
NK 110/30	—	110	130	30	No	Caged	650
RNA 4919	—	110	130	35	No	Caged	719
NK 110/40	—	110	130	40	No	Caged	830
RNA 6919	—	110	130	63	No	Caged	1460
NA 4822	110	120	140	30	Yes	Caged	1080
NKI 110/40	110	120	140	40	Yes	Caged	1460
NA 4922	110	125	150	40	Yes	Caged	2070
RNA 4920	—	115	140	40	No	Caged	1150
RNA 4822	—	120	140	30	No	Caged	670
NK 120/40	—	120	140	40	No	Caged	910
NA 4824	120	130	150	30	Yes	Caged	1170
NA 4924	120	135	165	45	Yes	Caged	2860
RNA 4922	—	125	150	40	No	Caged	1240
RNA 4824	—	130	150	30	No	Caged	730
NA 4826	130	145	165	35	Yes	Caged	1810
NA 4926	130	150	180	50	Yes	Caged	3900
RNA 4924	—	135	165	45	No	Caged	1860
NA 4828	140	155	175	35	Yes	Caged	1920
NKI 140/32	140	155	180	32	Yes	Caged	2050
NA 4928	140	160	190	50	Yes	Caged	4150
RNA 4826	—	145	165	35	No	Caged	990
RNA 4926	—	150	180	50	No	Caged	2210
NA 4830	150	165	190	40	Yes	Caged	2720
RNA 4828	—	155	175	35	No	Caged	1050
NK 155/32	—	155	180	32	No	Caged	1200
RNA 4928	—	160	190	50	No	Caged	2350
NA 4832	160	175	200	40	Yes	Caged	2890
RNA 4830	—	165	190	40	No	Caged	1600
NA 4834	170	—	215	45	Yes	Caged	3960
RNA 4832	—	175	200	40	No	Caged	1700
NA 4836	180	—	225	45	Yes	Caged	4200
RNA 4834	—	185	215	45	No	Caged	2540
NA 4838	190	—	240	50	Yes	Caged	5610
RNA 4836	—	195	225	45	No	Caged	2680
NA 4840	200	—	250	50	Yes	Caged	5840
RNA 4838	—	210	240	50	No	Caged	3210
RNA 4840	—	220	250	50	No	Caged	3350
NA 4844	220	—	270	50	Yes	Caged	6380
RNA 4844	—	240	270	50	No	Caged	3620
NA 4848	240	—	300	60	Yes	Caged	10000
NA 4852	260	—	320	60	Yes	Caged	10600
RNA 4848	—	265	300	60	No	Caged	5400
NA 4856	280	—	350	69	Yes	Caged	15300
RNA 4852	—	285	320	60	No	Caged	5800
NA 4860	300	—	380	80	Yes	Caged	21800
RNA 4856	—	305	350	69	No	Caged	9300
NA 4864	320	—	400	80	Yes	Caged	23000
RNA 4860	—	330	380	80	No	Caged	12700
NA 4868	340	—	420	80	Yes	Caged	24200
RNA 4864	—	350	400	80	No	Caged	13400
NA 4872	360	—	440	80	Yes	Caged	25600
RNA 4868	—	370	420	80	No	Caged	14000
NA 4876	380	—	480	100	Yes	Caged	42600
RNA 4872	—	390	440	80	No	Caged	14800
RNA 4876	—	415	480	100	No	Caged	26000

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