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Double row cylindrical roller bearing

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Double row cylindrical roller bearings - NN30... (K)/NNU49... (K) series

The spindle of machine tools has extremely high requirements for bearing rotation accuracy. High precision cylindrical roller bearings have high rigidity and load-bearing capacity, while achieving a good combination of high speed performance and small cross-sectional height.

The small cross-sectional height makes the wheelbase smaller during multi axis assembly. Cylindrical roller bearings are an ideal choice for floating bearings because they can compensate for length changes in mating components that are limited by heat.

There are various structures to choose from for high-precision cylindrical roller bearings used in machine tools. Size series 19 and 10 produce single row bearings, while size series 30 and 49 produce double row bearings. The aperture and outer diameter of single row and double row cylindrical roller bearings are identical within each diameter series range.

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Dimensions(mm)			Bearing		Load Rating(KN)		Limit load	Radial stiffness	Limiting Speed		Wight (kg)
d	D	B	Bearing		Cr	Cor	Pu(KN)	SR	Grease	Oil	Wight (kg)
25	47	16	NN3005	NN3005K	26.1	30.2	3.17	600	15800	18600	0.13
30	55	19	NN3006	NN3006K	29.3	34.1	4.01	682	14200	17100	0.18
35	62	20	NN3007	NN3007K	36.2	44.3	5.21	795	12300	15400	0.248
40	68	21	NN3008	NN3008K	45.3	59.4	6.98	955	11500	14300	0.305
45	75	23	NN3009	NN3009K	54.1	72.2	8.49	1090	10500	13200	0.4
50	80	23	NN3010	NN3010K	57.2	80.1	9.42	1200	9500	11400	0.42
55	90	26	NN3011	NN3011K	72.3	100.5	11.82	1320	9000	10500	0.635
60	95	26	NN3012	NN3012K	75.2	110.6	13.01	1420	8500	10000	0.672
65	100	26	NN3013	NN3013K	77.4	116.7	13.72	1500	7500	9000	0.75
70	110	30	NN3014	NN3014K	98.2	150.5	17.7	1650	7000	8500	1.05
75	115	30	NN3015	NN3015K	100.5	156.3	18.38	1750	6700	7900	.1.1
80	125	34	NN3016	NN3016K	120.5	186.3	21.91	1870	6500	7500	1.5
85	130	34	NN3017	NN3017K	125.4	200.5	23.58	2000	6200	7000	1.6
90	140	37	NN3018	NN3018K	140.5	224.6	26.42	2050	5900	6800	2.06
95	145	37	NN3019	NN3019K	143.2	236.4	27.81	2150	5600	6500	2.15
100	140	40	NNU4920	NNU4920K	129.4	256	30.11	3000	5600	6600	1.85
	150	37	NN3020	NN3020K	146.8	245.3	28.85	2200	5300	6300	2.25
105	145	40	NNU4921	NNU4921K	129.4	260.3	30.62	3100	5400	6500	1.9
	160	41	NN3021	NN3021K	190.3	310.5	36.52	2350	5000	6000	2.85
110	150	40	NNU4922	NNU4922K	132.5	271	31.88	3200	5000	6300	2
	170	45	NN3022	NN3022K	220.3 176.5	360.4	42.4	2520	4800	5300	3.62
120	165	45	NNU4924	NNU4924K	220.3 176.5	340.6	40.07	3300	4500	5300	2.7
	180	46	NN3024	NN3024K	232.6	390.1	45.89	2750	4500	5000	3.95
130	180	50	NNU4926	NNU4926K	190.8	391	46	3600	4100	5000	3.8
	200	52	NN3026	NN3026K	290.6	501	58.94	3000	4200	4700	5.8
140	190	50	NNU4928	NNU4928K	191	400.9	47.16	3700	3900	4700	4.1
	210	53	NN3028	NN3028K	301	522	61.41	3100	4000	4500	6.3
150	210	60	NNU4930	NNU4930K	326	655.5	69	4300	3700	4400	6.2
	225	56	NN3030	NN3030K	336	586	61.68	3350	3700	4200	7.6
160	220	60	NNU4932 NN3032	NNU4932K	336	681	71.68	4400	3500	4000	6.5
	240	60	NNU4932 NN3032	NN3032K	377	672	70.73	3530	3500	4000	9.25
170	230	60	NNU4934	NNU4934K	342	696	73.26	4550	3300	3800	6.8
	260	67	NN3034	NN3034K	453	802	84.42	3800	3200	3800	12.35
180	250	69	NNU4936	NNU4936K	406	851	89.57	5150	3100	3600	10
	280	74	NN3036	NN3036K	573	1003	105.57	4050	3000	3600	16.5
190	260	69	NNU4938	NNU4938K	406	882	92.84	5350	2900	3400	10.5
	290	75	NN3038	NN3038K	587	1042	109.68	4200	2800	3400	17.5
200	280	69	NNU4940	NNU4940K	491	1042	109.68	5520	2700	3200	14.5
	310	82	NN3040	NN3040K	657	1204	126.73	4450	2600	3200	22.3
220	300	80	NNU4944	NNU4944K	512	1143	120.31	6050	2500	3000	16
	340	90	NN3044	NN3044K	803	1462	153.89	4800	2400	3000	29
240	320	80	NNU4948	NNU4948K	532	1203	126.63	6350	2300	2800	17
	360	92	NN3048	NN3048K	852	1564	164.63	5150	2200	2800	31.5
260	360	100	NNU4952	NNU4952K	752	1705	179.47	7100	2100	2600	29.5
	400	104	NN3052	NN3052K	1062	2005	211.05	5700	2000	2600	45.8
280	380	100	NNU4956	NNU4956K	766	1805	190	7500	1900	2200	31.5
	420	106	NN3056	NN3056K	1085	2085	219.47	5900	1800	2300	49.55
300	420	118	NNU4960	NNU4960K	1042	2405	253.15	8300	1800	2100	49
320	440	118	NNU4964	NNU4964K	1062	2555	268.94	8800	1700	2000	52

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