Cylindrical roller bearings

Double Row Cylindrical Roller Bearings

Double row cylindrical roller bearings are engineered to provide greater radial load capacity and enhanced rigidity compared with single row designs. Featuring two rows of cylindrical rollers, these bearings are particularly suitable for applications requiring high precision, dimensional stability and reliable performance under heavy loads.

The optimized internal structure helps distribute loads evenly across both roller rows, reducing deformation and improving operational accuracy. This makes double row cylindrical roller bearings a preferred choice for equipment where shaft stiffness and rotational precision are critical.

BY Bearings supplies high-performance double row cylindrical roller bearings for machine tools, industrial gearboxes, rolling equipment and precision machinery. Manufactured with advanced production technologies, our bearings deliver consistent quality, durability and long-term reliability.

Type: Double Row Cylindrical Roller Bearing

Material: High-Quality Bearing Steel / Stainless Steel

Load Capacity: High radial load capacity, specific to the design
Working Temperature：-40°C to +150°C
Lubrication：Grease or Oil, customizable
Precision Class: P0, P6, P5, P4

Double Row Cylindrical Roller Bearings

Double row cylindrical roller bearings are specifically designed for applications requiring high radial load capacity combined with exceptional rigidity and rotational accuracy. The two-row roller arrangement allows these bearings to support significantly greater loads while maintaining shaft stability under demanding operating conditions.

These bearings are commonly manufactured in NN and NNU designs. Many versions feature tapered bores that facilitate precise preload adjustment and accurate mounting, making them highly suitable for machine tool spindles and precision equipment.

Compared with single row bearings, double row cylindrical roller bearings offer:

Increased radial load carrying capacity
Higher shaft rigidity
Improved running accuracy
Better resistance to shaft deflection
Excellent dimensional stability

Typical applications include:

Machine tool spindles
Precision manufacturing equipment
Heavy-duty gearboxes
Metallurgical machinery
Industrial presses
High-performance transmission systems

BY Bearings provides a wide range of double row cylindrical roller bearings with optimized internal geometry, precision manufacturing and customized solutions to meet diverse industrial requirements.

202207061004090746

Model	d(mm)	D(mm)	B(mm)	Basic Dynamic Load Rating Cr (kN)	Basic Static Load Rating Cor (kN)	Fatigue Limit Load Pu (kN)	Radial Stiffness SR (N/μm)	Grease Limiting Speed (r/min)	Oil/Air Limiting Speed (r/min)	Weight (kg)
NN 3005 / NN 3005K	25	47	16	26.1	30.2	3.17	600	15.8	18.6	0.13
NN 3006 / NN 3006K	30	55	19	29.3	34.1	4.01	682	14.2	17.1	0.18
NN 3007 / NN 3007K	35	62	20	36.2	44.3	5.21	795	12.3	15.4	0.248
NN 3008 / NN 3008K	40	68	21	45.3	59.4	6.98	955	11.5	14.3	0.305
NN 3009 / NN 3009K	45	75	23	54.1	72.2	8.49	1090	10.5	13.2	0.4
NN 3010 / NN 3010K	50	80	23	57.2	80.1	9.42	1200	9.5	11.4	0.42
NN 3011 / NN 3011K	55	90	26	72.3	100.5	11.82	1320	9	10.5	0.635
NN 3012 / NN 3012K	60	95	26	75.2	110.6	13.01	1420	8.5	10	0.672
NN 3013 / NN 3013K	65	100	26	77.4	116.7	13.72	1500	7.5	9	0.75
NN 3014 / NN 3014K	70	110	30	98.2	150.5	17.7	1650	7	8.5	1.05
NN 3015 / NN 3015K	75	115	30	100.5	156.3	18.38	1750	6.7	7.9	1.1
NN 3016 / NN 3016K	80	125	34	120.5	186.3	21.91	1870	6.5	7.5	1.5
NN 3017 / NN 3017K	85	130	34	125.4	200.5	23.58	2000	6.2	7	1.6
NN 3018 / NN 3018K	90	140	37	140.5	224.6	26.42	2050	5.9	6.8	2.06
NN 3019 / NN 3019K	95	145	37	143.2	236.4	27.81	2150	5.6	6.5	2.15
NNU 4920 / 4920K	100	140	40	129.4	256	30.11	3000	5.6	6.6	1.85
NN 3020 / NN 3020K	100	150	37	146.8	245.3	28.85	2200	5.3	6.3	2.25
NNU 4921 / 4921K	105	145	40	129.4	260.3	30.62	3100	5.4	6.5	1.9
NN 3021 / NN 3021K	105	160	41	190.3	310.5	36.52	2350	5	6	2.85
NNU 4922 / 4922K	110	150	40	132.5	271	31.88	3200	5	6.3	2
NN 3022 / NN 3022K	110	170	45	220.3	360.4	42.4	2520	4.8	5.3	3.62
NNU 4924 / 4924K	120	165	45	176.5	340.6	40.07	3300	4.5	5.3	2.7
NN 3024 / NN 3024K	120	180	46	232.6	390.1	45.89	2750	4.5	5	3.95
NNU 4926 / 4926K	130	180	50	190.8	391	46	3600	4.1	5	3.8
NN 3026 / NN 3026K	130	200	52	290.6	501	58.94	3000	4.2	4.7	5.8
NNU 4928 / 4928K	140	190	50	191	400.9	47.16	3700	3.9	4.7	4.1
NN 3028 / NN 3028K	140	210	53	301	522	61.41	3100	4	4.5	6.3
NNU 4930 / 4930K	150	210	60	326	655.5	69	4300	3.7	4.4	6.2
NN 3030 / NN 3030K	150	225	56	336	586	61.68	3350	3.7	4.2	7.6
NNU 4932 / NNU 4932K	160	220	60	336	681	71.68	4.4	3.5	4	6.5
NN 3032 / NN 3032K	160	240	60	377	672	70.73	3.53	3.5	4	9.25
NNU 4934 / NNU 4934K	170	230	60	342	696	73.26	4.55	3.3	3.8	6.8
NN 3034 / NN 3034K	170	260	67	453	802	84.42	3.8	3.2	3.8	12.35
NNU 4936 / NNU 4936K	180	250	69	406	851	89.57	5.15	3.1	3.6	10
NN 3036 / NN 3036K	180	280	74	573	1003	105.57	4.05	3	3.6	16.5
NNU 4938 / NNU 4938K	190	260	69	406	882	92.84	5.35	2.9	3.4	10.5
NN 3038 / NN 3038K	190	290	75	587	1042	109.68	4.2	2.8	3.4	17.5
NNU 4940 / NNU 4940K	200	280	69	491	1042	109.68	5.52	2.7	3.2	14.5
NN 3040 / NN 3040K	200	310	82	657	1204	126.73	4.45	2.6	3.2	22.3
NNU 4944 / NNU 4944K	220	300	80	512	1143	120.31	6.05	2.5	3	16
NN 3044 / NN 3044K	220	340	90	803	1462	153.89	4.8	2.4	3	29
NNU 4948 / NNU 4948K	240	320	80	532	1203	126.63	6.35	2.3	2.8	17
NN 3048 / NN 3048K	240	360	92	852	1564	164.63	5.15	2.2	2.8	31.5
NNU 4952 / NNU 4952K	260	360	100	752	1705	179.47	7.1	2.1	2.6	29.5
NN 3052 / NN 3052K	260	400	104	1062	2005	211.05	5.7	2	2.6	45.8
NNU 4956 / NNU 4956K	280	380	100	766	1805	190	7.5	1.9	2.2	31.5
NN 3056 / NN 3056K	280	420	106	1085	2085	219.47	5.9	1.8	2.3	49.55
NNU 4960 / NNU 4960K	300	420	118	1042	2405	253.15	8.3	1.8	2.1	49
NNU 4964 / NNU 4964K	320	440	118	1062	2555	268.94	8.8	1.7	2	52

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Double Row Cylindrical Roller Bearings

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