NN Double Row Cylindrical Roller Bearings

NN double row cylindrical roller bearings have two sets of cylindrical rollers arranged in parallel, separated by a small distance, providing high radial load-carrying capacity. They are suitable for high-speed rotating applications and have low friction due to the use of a cage. NN bearings are widely used in machine tool spindles, speed reducers, and other precision machinery.

Technial Specification

Table 1

d	D	B	rsmin	E	Mass	CrKN	CorKN	Reference	Limit	Bearing Code	D1min	D4max	D5min
d	D	B	rsmin	E	Mass	CrKN	CorKN	speed	Speed	Bearing Code	D1min	D4max	D5min
30	55	19	1	48.5	0.191	29	34	16000	19000	NN3006ASK	35	50	49
35	62	20	1	55	0.249	35.5	44	14000	17000	NN3007ASK	40	57	56
40	68	21	1	61	0.303	45	58.5	12000	15000	NN3008ASK	45	63	62
45	75	23	1	67.5	0.393	54	72	11000	14000	NN3009ASK	50	70	69
50	80	23	1	72.5	0.426	57	80	10000	13000	NN3010ASK	55	75	74
55	90	26	1.1	81	0.63	57	80	9000	11000	NN3011ASK	61	84	82
60	95	26	1.1	86.1	0.674	75	110	8500	10000	NN3012ASK	66	89	87
65	100	26	1.1	91	0.715	76.5	116	8000	9500	NN3013ASK	71	94	92
70	110	30	1.1	100	1.04	98	150	7000	8500	NN3014ASK	76	104	702
75	115	30	1.1	105	1.09	100	156	6700	8000	NN3015ASK	81	109	107
80	125	34	1.1	113	1.51	120	186	6300	7500	NN3016ASK	86	119	115
85	130	34	1.1	118	1.58	125	200	6000	7000	NN3017ASK	91	124	120
90	140	37	1.5	127	2.05	140	224	5600	6700	NN3018ASK	98	132	129
95	145	37	1.5	132	2.14	143	236	5300	6300	NN3019ASK	103	137	134
100	150	37	1.5	137	2.23	146	245	5300	6300	NN3020ASK	108	142	139
105	160	41	2	146	2.84	190	310	4800	5600	NN3021ASK	114	151	148
110	170	45	2	155	3.61	220	360	4500	5300	NN3022ASK	119	161	157
120	180	46	2	165	3.94	232	390	4300	5000	NN3024ASK	129	171	167
130	200	52	2	182	5.79	290	500	3800	4500	NN3026ASK	139	191	184
140	210	53	2	192	6.22	300	520	3600	4300	NN3028ASK	149	201	194
150	225	56	2.1	206	7.58	335	585	3400	4000	NN3030ASK	160	215	208
160	240	60	2.1	219	9.23	375	670	3200	3800	NN3032ASK	170	230	222
170	260	67	2.1	236	12.5	450	800	3000	3600	NN3034ASK	180	250	239
180	280	74	2.1	255	16.4	570	1000	2800	3400	NN3036ASK	190	270	258
190	290	75	2.1	265	17.3	585	1040	2600	3200	NN3038ASK	200	280	268
200	310	82	2.1	282	22.2	655	1200	2400	3000	NN3040ASK	210	300	285
220	340	90	3	310	29.1	800	1460	2200	2800	NN3044ASK	232	328	313
240	360	92	3	330	31.6	850	1560	2000	2600	NN3048ASK	252	348	334
260	400	104	4	364	46.2	1060	2000	1900	2400	_NN3052ASK	275	385	368
280	420	106	4	384	49.7	1080	2080	1800	2200	NN3056ASK	295	405	388
300	460	118	4	418	68.8	1270	2400	1600	1900	NN3060ASK	315	445	422
320	480	121	4	438	74.2	1320	2600	1600	1900	NN3064ASK	335	465	442
340	520	133	5	473	99.3	1630	3250	1400	1700	NN3068ASK	357	503	477
360	540	134	5	493	104	1660	3350	1400	1700	NN3072ASK	377	523	497
380	560	135	5	513	110	1700	3450	1300	1600	NN3076ASK	397	543	517
400	600	148	5	549	143	2160	4500	1200	1500	NN3080ASK	417	583	553

Advantages

NN double row cylindrical roller bearings have several advantages:

1. High load carrying capacity: Due to the two sets of cylindrical rollers arranged in parallel, NN bearings can withstand high radial loads.

2. High precision: NN bearings are suitable for high-precision applications, such as machine tool spindles, due to their high rigidity and low friction.

3. Suitable for high-speed rotation: The use of a cage reduces friction and enables NN bearings to rotate at higher speeds.

4. Easy to install and maintain: NN bearings have a simple structure and are easy to install and maintain.

5. Long service life: NN bearings are designed to withstand high loads and can provide long service life with proper maintenance.

In summary, NN double row cylindrical roller bearings have high load-carrying capacity, high precision, suitability for high-speed rotation, ease of installation and maintenance, and long service life.