Double row cylindrical roller bearing

For the N30 series cylindrical roller bearings, the ribs are set on the inner ring, and the outer ring can be separated: while for NNU49 series cylindrical roller bearings, the ribs are set on the outer ring, and the inner ring can be separated. For double row cylindrical roller bearings, when lubricated with oil, a ring-shaped oil groove and three oil holes with symmetrical distribution are arranged in the middle of the outer ring of the bearing, marked as W33.

Double row cylindrical roller bearings have two types of bearing holes: cylindrical bore, tapered bore. Since cylindrical roller bearings with tapered bores are easy to adjust radial installation clearance after installation, the most commonly used cylindrical roller bearings in machine tools are double row cylindrical roller bearings with tapered bores. This kind of bearing can only bear large radial load, and inner and outer ring can be separated, so it is often used in combination with bidirectional thrust angular contact ball bearing which can bear axial load. ZYS can also offer single row cylindrical roller bearings.

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Bearing designation ZYS	Boundary dimension					Rated load		Limit speed		Radial stiffness Rr KN/m	Weight KG ≈
	d	D	B	rsmin	E	Cr	Cor	Grease	Oil
	mm					KN		r/min
NN3006	30	55	19	1.0	48.5	29	34	16000	19000	0.6	0.19
NN3007	35	62	20	1.0	61	35.5	44	14000	17000	0.7	0.25
NN3008	40	68	21	1.0	61	45	58.5	12000	15000	0.9	0.31
NN3009	45	75	23	1.0	67.5	54	72	11000	14000	1.0	0.40
NN3010	50	80	23	1.0	72.5	57	80	10000	13000	1.1	0.41
NN3011	55	90	26	1.1	81	72	100	9000	11000	1.3	0.65
NN3012	60	95	26	1.1	86.1	75	110	8500	10000	1.4	0.67
NN3013	65	100	26	1.1	91	76.5	116	8000	9500	1.4	0.74
NN3014	70	110	30	1.1	100	98	150	7000	8500	1.6	1.07
NN3015	75	115	30	1.1	106	100	156	6700	8000	1.7	1.13
NN3016	80	125	34	1.1	113	120	186	6300	7500	1.8	1.56
NN3017	85	130	34	1.1	118	125	200	6000	7000	1.9	1.64
NN3018	90	140	37	1.5	127	140	224	5600	6700	2.0	2.13
NN3019	95	145	37	1.5	132	143	236	5300	6300	2.1	2.23
NN3020	100	150	37	1.5	137	146	245	5300	6300	2.1	2.32
NN3021	105	160	41	2.0	146	190	310	4800	5600	2.3	2.96
NN3022	110	170	45	2.0	155	220	360	4500	5300	2.5	3.76
NN3024	120	180	46	2.0	165	232	390	4300	5000	2.7	4.10
NN3026	130	200	52	2.0	182	290	500	3800	4500	2.9	6.04
NN3028	140	210	53	2.0	192	300	520	3600	4300	3.0	6.48
NN3030	150	225	56	2.1	206	335	585	3400	4000	3.3	7.88
NN3032	160	240	60	2.1	219	375	670	3200	3800	3.5	9.57
NN3034	170	260	67	2.1	236	450	800	3000	3600	3.7	13.0
NN3036	180	280	74	2.1	255	570	1000	2800	3400	4.0	17.0
NN3038	190	290	75	2.1	265	585	1040	2600	3200	4.1	18.0
NN3040	200	310	82	2.1	282	655	1200	2400	3000	4.4	23.0
NN3044	220	340	90	3.0	310	800	1460	2200	2800	4.7	30.0
NN3048	240	360	92	3.0	330	850	1560	2000	2600	5.1	32.4
NN3052	260	400	104	4.0	364	1060	2000	1900	2400	5.6	47.0
NN3056	280	420	106	4.0	384	1080	2080	1800	2200	5.8	50.5
NN3060	300	460	118	4.0	418	1270	2400	1600	1900	5.9	68.8
NN3064	320	480	121	4.0	438	1320	2600	1600	1900	6.4	74.2
NN3068	340	520	133	5.0	473	1630	3250	1400	1700	7.2	99.3
NN3072	360	540	134	5.0	493	1660	3350	1400	1700	7.4	104
NN3076	380	560	135	5.0	513	1700	3450	1300	1600	7.6	110
NN3080	400	600	148	5.0	549	2160	4500	1200	1500	8.7	143
NN3084	420	620	150	5.0	569	2120	4500	1200	1500	8.7	150
NN3088	440	650	157	6.0	597	2450	5100	1100	1400	9.2	172
NN3092	460	680	163	6.0	624	2600	5400	1100	1400	9.4	197
NN3096	480	700	165	6.0	644	2700	5850	1000	1300	10.1	206
NN30/500	500	720	167	6.0	664	2650	5850	1000	1300	10.1	214