OEM/ODM Series NNCL-Double Row Full Complement Cylindrical Roller Bearings Company, Factory

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Series NNCL-Double Row Full Complement Cylindrical Roller Bearings

NNC
NNCF
NNCL

Design Variants
Misalignment
Cage
Tolerance
Internal clearance

Full complement cylindrical roller bearings are non-separable bearings, exception series NJ23 VH.

This kind of bearings features a much higher internal friction due to them without cage. So the speed ratings are limited.

Full complement cylindrical roller bearings are mainly produced in single row and double row designs.

Un-sealed single row and double row bearings are frequently used in gearbox, sealed double row bearings are frequently used in hoisting mechanism.

Additional to the standard products range of single row and double row full complement cylindrical roller bearings, DHK can produce other full complement bearings according to individual customer specifications or special bearings upon request.

The most important basic types are shown on the below.

Single row bearings

Series NJ23...VH these bearings feature two integral flanges on their outer ring and one integral flange on their inner ring, thus there are able to accommodate minor thrust force in one direction only. Bearings of this series are self-retaining roller assemblies, which enable the removal of inner rings without loss of roller retention in the outer rings.

Series NC...: These bearings feature two integral flanges in their inner ring and an outer ring with one integral flange one side and one loose rib on its opposite side. Thus they are able to be used as locating bearings and accommodate minor axial force in both directions.

Series NCF...These bearings feature two integral flanges on the inner ring and an outer ring with one integral flange on one side and a retaining ring which sitting in circumferential groove at the opposite side. Thus these bearings are able to accommodate minor axial force in one direction only.

Double row bearings

Series NNCL...: This type double row cylindrical roller bearings have an inner ring with three integral flanges and a plain outer ring. The outer ring has two retaining rings which sitting in circumferential groove on both sides of the raceway diameter to retain the outer ring and bearing assembly. Thus these bearings could not accommodate any axial force.

Series NNC... This type bearing has three integral flanges on their inner ring and an outer ring with one integral flanges on one side and a loose rib on the opposite side. Thus these bearings are able accommodate minor axial forced in both directions and can be used as locating bearing.

Series NNCF... This type bearing feature three integral flanges on the inner ring and an outer ring with one integral flanges at one side and a retaining ring which sitting in circumferential groove at the opposite side.

Thus these bearing are able to accommodate minor axial force in on direction only.

Series NNF50...2LS.V: Bearings of this series feature an outer ring with a center integral flange and two half inner ring with two integral flanges on each half .Two half inner rings are connected by a connecting ring which also retains the outer ring and bearing assembly. These bearings also feature lubrication grooves and hole both on outer ring and inner ring and two snap grooves on outer diameter.

These bearings are supplied with two contacting seals (suffix .2LS) and pre-greased. However, if need supplied with snap rings (suffix.2NR), please make clear before release the order.

These series bearings have an outer ring with l mm less than the width of inner ring, several same bearings simply mounted on one shaft and there are a space between outer rings face, and this enable the different outer rings have different speed, this feature make it performance well when it used as pulley bearings.
Single row full complement cylindrical roller bearings a misalignment between inner ring and outer ring must not exceed 4 angular minutes maximum.

Double row full complement cylindrical roller bearings are not able to compensate any misalignment.
Single row full complement cylindrical roller bearings a misalignment between inner ring and outer ring must not exceed 4 angular minutes maximum.
Double row full complement cylindrical roller bearings are not able to compensate any misalignment.

DHK full complement cylindrical roller bearings are produced to normal tolerance class (PN) as standard.DHK can provide these bearings with other tolerance class upon request.

Detailed tolerance values are listed in chapter of Tolerance of radial bearings, page 8.

Tolerances for DHK full complement cylindrical roller bearings (excluding tapered roller bearings)

All dimensions shown in (mm):

Tolerances in (um):

Inner Ring

PN/(Normal)

Nominal Bore diameter		Deviation dmp	Variation Vdp Series			Variation Vdmp	Taper bore 1:12 Deviation/ Variation
>	<=	△dmp	7．8．9	0．1	2．3．4	Vdmp	△dmp	△d1mp-dmp	Vdp
2.5 10		0 -8	10	8	6	6	+15 0	+15 0	10
10 18		0 -8	10	8	6	6	+18 0	+18 0	10
18 30		0 -10	13	10	8	8	+21 0	+21 0	13
30 50		0 -12	15	12	9	9	+25 0	+25 0	15
50 80		0 -15	19	19	11	11	+30 0	+30 0	19
80 120		0 -20	25	25	15	15	+35 0	+35 0	25
120 180		0 -25	31	31	19	19	+40 0	+40 0	31
180 250		0 -30	38	38	23	23	+46 0	+46 0	38
250 315		0 -35	44	44	26	26	+52 0	+52 0	44
315 400		0 -40	50	50	30	30	+57 0	+57 0	50
400 500		0 -45	56	56	34	34	+63 0	+63 0	56
500 630		0 -50	63	63	38	38	+70 0	+70 0
630 800		0 -75					+80 0	+80 0
800 1000		0 -100					+90 0	+90 0
1000 1250		0 -125					+105 0	+105 0
1250 1600		0 -160
1600 2000		0 -200

Outer ring

PN/(Normal)

Nominal Outer diameter		Deviation	Variation Vdp Series			Sealed bearing	Variation	Radial runout
>	<=	△Dmp	7．8．9	0．1	2．3．4	2 3 4	VDmp	Kea
6 18		0 -8	10	8	6	10	6	15
18 30		0 -9	12	9	7	12	7	15
30 50		0 -11	14	11	8	16	8	20
50 80		0 -13	16	13	10	20	10	25
80 120		0 -15	19	19	11	26	11	35
120 150		0 -18	23	23	14	30	14	40
150 180		0 -25	31	31	19	38	19	45
180 250		0 -30	38	38	23		23	50
250 315		0 -35	44	44	26		26	60
315 400		0 -40	50	50	30		30	70
400 500		0 -45	56	56	34		34	80
500 630		0 -50	63	63	38		38	100
630 800		0 -75	94	94	55		55	120
800 1000		0 -100	125	125	75		75	140
1000 1250		0 -125						160
1250 1600		0 -160						190
1600 2000		0 -200						220
2000 2500		0 -250						250

DHK full complement cylindrical roller bearings are produced to the normal internal radial clearance group (CN) as standard.Upon request, DHK can provide these bearings with other clearance group.

Detailed values of radial clearance groups are listed in the tables on page 128.

Internal Clearance Groups Of DHK Cylindrical Roller Bearings With Cylindrical Bore

Bore Dia.(mm)
>	<=	C1（um）	C2（um）	CN（um）	C3（um）	C4（um）	C5（um）
-- 24		5 15	0 25	20 45	35 60	50 75	75 100
24 30		5 15	0 25	20 45	35 60	50 75	75 100
30 40		5 15	5 30	25 50	45 70	60 85	85 110
40 50		5 18	5 35	30 60	50 80	70 100	100 130
50 65		5 20	10 40	40 70	60 90	80 100	110 140
65 80		10 25	10 45	40 75	65 100	90 125	125 160
80 100		10 30	15 50	50 85	75 110	105 140	140 175
100 120		10 30	15 55	50 90	85 125	125 165	165 205
120 140		10 35	15 60	60 105	100 145	145 190	190 235
140 160		10 35	20 70	70 120	115 165	165 215	215 265
160 180		10 40	25 75	75 125	120 170	170 220	220 270
180 200		15 45	35 90	90 145	140 195	195 250	250 305
200 225		15 50	45 105	105 165	160 220	220 280	280 340
225 250		15 50	45 110	110 175	170 235	235 300	300 365
250 280		20 55	55 125	125 195	190 260	260 330	330 400
280 315		20 60	55 130	130 205	200 275	275 350	350 425
315 355		20 65	65 145	145 225	225 305	305 385	385 465
355 400		25 75	100 190	190 280	280 270	570 460	460 550
400 450		25 85	110 210	210 310	310 410	410 510	510 610
450 500		25 95	110 220	220 330	330 440	440 550	550 660
500 560		25 100	120 240	240 360	360 480	480 600	600 720
560 630		30 110	140 260	260 380	380 500	500 620	620 740
630 710		30 130	145 285	285 425	425 565	565 705	705 845
710 800		35 140	150 310	610 470	470 630	630 790	790 950
800 900		35 160	180 350	350 520	520 690	690 860	860 1030
900 1000		35 170	200 390	390 580	580 770	770 960	960 1150
1000 1120		50 200	220 430	430 640	640 850	850 1060	1060 1270
1120 1250		50 200	230 470	470 710	710 950	950 1190	1060 1270
1250 1400		50 200	270 530	530 790	790 1050	1050 1310	1060 1270
1400 1600		50 200	330 610	610 890	890 1170	1170 1450	1060 1270
1600 1800		50 200	380 700	700 1020	1020 1340	1340 1660	1060 1270
1800 2000		50 200	400 760	760 1120	1120 1480	1480 1840	1060 1270

Internal clearance groups of DHK cylindrical roller bearings with tapered bore

Bore Dia.(mm)
>	<=	C1（um）	C2（um）	CN（um）	C3（um）	C4（um）	C5（um）
-- 24		10 20	15 40	30 55	40 65	50 75	75 100
24 30		15 25	20 45	35 60	45 70	55 80	80 105
30 40		15 25	20 45	40 65	55 80	70 95	95 120
40 50		17 30	25 55	45 75	60 90	75 105	105 135
50 65		20 35	30 60	50 80	70 100	90 120	120 150
65 80		25 40	35 70	60 95	85 120	110 145	145 180
80 100		35 55	40 75	70 105	95 130	120 155	155 190
100 120		40 60	50 90	90 130	115 155	140 180	180 220
120 140		45 70	55 100	100 145	130 175	160 205	205 250
140 160		50 75	60 110	110 160	145 195	180 230	230 280
160 180		55 85	75 125	126 175	160 210	195 245	245 295
180 200		60 90	85 140	140 195	180 235	220 275	275 330
200 225		60 95	95 155	155 215	200 260	245 305	305 365
225 250		65 100	105 170	170 235	220 285	270 335	335 400
250 280		75 110	115 185	185 255	240 310	295 365	365 435
280 315		80 120	130 205	205 280	265 340	325 400	400 475
315 355		90 135	145 250	225 304	290 370	355 435	435 515
355 400		100 150	165 255	225 345	330 420	405 495	495 585
400 450		110 170	185 285	285 385	370 470	455 555	555 655
450 500		120 190	205 315	315 425	410 520	505 615	615 725
500 560		130 210	230 350	350 470	455 575	560 680	680 800
560 630		140 230	260 380	380 500	500 620	620 740	740 860
630 710		160 260	295 435	435 575	565 705	685 835	935 975
710 800		170 290	325 485	485 645	630 790	775 935	935 1095
800 900		190 330	370 540	540 710	700 870	860 1030	1030 1200
900 1000		210 360	410 600	600 790	780 970	960 1150	1150 1340
1000 1120		230 400	455 665	665 875	865 1075	1065 1275	1275 1485
1120 1250		230 400	490 730	730 970	960 1200	1200 1440	1275 1485
1250 1400		230 400	550 810	810 1070	1070 1330	1330 1590	1275 1485
1400 1600		230 400	640 920	920 1200	1200 1480	1480 1760	1275 1485
1600 1800		230 400	700 1020	1020 1340	1340 1660	1660 1980	1275 1485
1800 2000		230 400	760 1120	1120 1480	1480 1840	1840 2200	1275 1485

Model	Dimensions				Rated load		Extreme speed		Bearing dimensions						Weight
Model	d	D	B	r1,r2 Min	Dynamic load Cr	Static load Cor	Grease lubrication	Oil lubrication	E	d1	D1	Bs	Bk	s	Weight
NNCL48/500V	500	620	118	3	1625	4987	200	380	583.5	547	--	9.4	5	7	83
NNCL48/530V	530	650	118	3	1700	5285	180	340	615	577.5	--	9.4	5	6	87.2
NNCL4830V	150	190	40	1.1	230	560	720	1500	178.7	165	--	7	4	2	2.8
NNCL4832V	160	200	40	1.1	238	600	680	1400	190.1	176.5	--	7	4	2	3
NNCL4834V	170	215	45	1.1	258	631	640	1300	201.7	187.5	--	7	4	3	4
NNCL4836V	180	225	45	1.1	266	664	610	1200	211.3	196	--	7	4	3	4.2
NNCL4838V	190	240	50	1.5	305	760	560	1150	225.4	209	--	7	4	4	5.5
NNCL4840V	200	250	50	1.5	315	799	550	1100	235.9	219.5	--	7	4	4	5.8
NNCL4844V	220	270	50	1.5	330	878	500	1000	256.9	240.5	--	7	4	4	6.3
NNCL4848V	240	300	60	2	497	1292	480	900	282.4	261.5	--	8	4	4	10
NNCL4852V	260	320	60	2	521	1406	430	820	304.7	283.5	--	8	4	4	10.8
NNCL4856V	280	350	69	2	680	1853	400	750	332.9	309	--	8	4	4	15.8
NNCL4860V	300	380	80	2.1	801	2146	380	700	357.4	330.5	--	9.4	5	6	22.5
NNCL4864V	320	400	80	2.1	832	2300	340	640	380.3	353.5	--	9.4	5	6	23.8
NNCL4868V	340	420	80	2.1	850	2415	320	600	397.4	370.5	--	9.4	5	6	25.2
NNCL4872V	360	440	80	2.1	880	2571	300	560	420.2	393	--	9.4	5	6	26.5
NNCL4876V	380	480	100	2.1	1293	3618	280	530	456	421.5	--	9.4	5	6	44.6
NNCL49/500V	500	670	170	5	3350	8850	170	360	631.5	568.5	610.5	9.4	5	8	175
NNCL49/530V	530	710	180	4	3870	10100	160	340	663	588	648	9.4	5	8	205
NNCL4912V	60	85	25	1	76.5	134	1700	3400	78.9	69.5	76.5	4.5	3.5	1	0.46
NNCL4914V	70	100	30	1	103	188	1400	3000	92.3	82	89	4.5	3.5	1	0.79
NNCL4916V	80	110	30	1	110	210	1200	2600	101.2	90.5	98	5	3.5	1	0.88
NNCL4918V	90	125	35	1.1	146	292	1100	2300	115.5	103.5	111.5	5	3.5	1.5	1.37
NNCL4920V	100	140	40	1.1	190	390	950	2000	130	116.5	125.5	5	3.5	2	2
NNCL4922V	110	150	40	1.1	197	420	900	1900	138.6	125	134	6	3.5	2	2.2
NNCL4924V	120	165	45	1.1	220	465	800	1700	154	139	149	6	3.5	3	3
NNCL4926V	130	180	50	1.5	255	540	750	1600	166	149.5	160.5	6	3.5	4	4
NNCL4928V	140	190	50	1.5	265	576	700	1500	176.4	160	171	6	3.5	4	4.2
NNCL4930V	150	210	60	2	383	843	680	1400	192	172.5	185.5	7	4	4	6.8
NNCL4932V	160	220	60	2	399	906	650	1300	203.9	184.5	197.5	7	4	4	7.1
NNCL4934V	170	230	60	2	408	950	600	1200	212.2	192.5	205.5	7	4	4	7.5
NNCL4936V	180	250	69	2	547	1220	570	1100	231.1	207	223	7	4	4	10.8
NNCL4938V	190	260	69	2	562	1290	550	1100	241.3	217.5	233	7	4	4	11.3
NNCL4940V	200	280	80	2.1	661	1495	530	1000	260	233	251	8	4	5	15.9
NNCL4944V	220	300	80	2.1	690	1610	500	950	277.2	250	268	8	4	5	17.2
NNCL4948V	240	320	80	2.1	725	1762	450	850	300.1	273	291	8	4	5	18.5
NNCL4952V	260	360	100	2.1	1070	2520	400	750	331.5	297	320	9.4	5	6	32.2
NNCL4956V	280	380	100	2.1	1120	2710	380	700	353.5	319	342	9.4	5	6	34.2
NNCL4960V	300	420	118	3	1560	3630	340	650	390.2	346.5	375.5	9.4	5	6	52.8
NNCL4964V	320	440	118	3	1600	3835	320	600	409	365.5	399	9.4	5	6	55.2
NNCL4968V	340	460	118	3	1640	4035	300	560	427.1	383.5	412.5	9.4	5	6	58.8
NNCL4972V	360	480	118	2.5	1690	4240	300	550	446	399	436.5	9.4	5	6	60.5
NNCL4976V	380	520	140	4	2124	5460	260	500	481.5	433.5	465.5	9.4	5	7	92.4
NNCL4996V	480	650	170	5	3720	8420	180	360	605.5	537	592	9.4	5	8	166
NNCL5024V	120	180	80	2	561	1050	800	1700	168	139	161	6	3.5	2.5	7.1

Ningbo DHK Precision Bearing Co., Ltd.

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Latest News

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Industry Knowledge Expansion

1. Double Row Configuration: Enhancing Load-Bearing Capabilities

The double row configuration of Series NNCL bearings is a testament to their engineering sophistication. Unlike their single row counterparts, these bearings feature two rows of cylindrical rollers, aligned in parallel within the bearing assembly. This design offers several advantages, chief among them being the enhanced load-bearing capabilities. By distributing the load across two rows of rollers, rather than a single row, Series NNCL bearings can accommodate significantly higher radial loads without compromising on performance or reliability. This attribute is particularly advantageous in applications where heavy machinery or equipment operates under extreme conditions, such as in mining, steel production, or heavy manufacturing. The double row configuration allows for increased rigidity and stability within the bearing assembly. This not only minimizes the risk of roller misalignment but also enhances the overall precision and efficiency of the system. As a result, Series NNCL bearings excel in applications where precise positioning and smooth operation are essential, such as robotic arms, CNC machines, and high-precision manufacturing equipment. The compact footprint of double row bearings makes them well-suited for installations where space is at a premium. Whether integrated into a confined machinery enclosure or mounted within a compact assembly, Series NNCL bearings deliver exceptional performance without sacrificing space efficiency.

2. Application Versatility: Meeting Diverse Industry Needs

Series NNCL double row full complement cylindrical roller bearings are engineered to meet the diverse needs of modern industry. In heavy machinery and equipment, such as mining excavators and construction cranes, Series NNCL bearings provide robust support for heavy radial loads, ensuring smooth operation and prolonged service life even in the most demanding conditions. Their ability to withstand high shock and vibration levels makes them ideal for use in rugged environments where reliability is paramount. In the automotive sector, Series NNCL bearings find application in various components, including wheel hubs, transmission systems, and steering assemblies. Their compact design and exceptional load-carrying capacity make them well-suited for integration into automotive systems, where space constraints and performance requirements are stringent. In the aerospace industry, Series NNCL bearings play a crucial role in aircraft engines, landing gear systems, and flight control mechanisms. Their ability to operate at high speeds and withstand extreme temperatures makes them indispensable components in aircraft propulsion and control systems, where precision and reliability are non-negotiable. Beyond these industries, Series NNCL bearings also find use in a myriad of other applications, including railway rolling stock, wind turbines, and industrial robotics. Their adaptability and performance make them a preferred choice for engineers and designers seeking robust and reliable solutions for their mechanical systems.

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Latest News

What are the potential consequences of using improper or damaged rolling mill bearings in terms of safety and performance?

How do environmental factors, such as temperature and humidity, affect the performance of rolling mill bearings?

Are there any specific alignment requirements for screw compressor bearings to optimize performance and reduce wear?

What are the best practices for installing and mounting bearings in engineering machinery to ensure proper functionality?

What are the potential risks associated with over-lubrication or under-lubrication of motor bearings?

How do factors such as load capacity and rotational speed requirements influence the selection of bearings for different agricultural applications?

Industry Knowledge Expansion

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Series NNCL-Double Row Full Complement Cylindrical Roller Bearings

Ningbo DHK Precision Bearing Co., Ltd.

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Click to view our factory

CERTIFICATE

Latest News

What are the potential consequences of using improper or damaged rolling mill bearings in terms of safety and performance?

How do environmental factors, such as temperature and humidity, affect the performance of rolling mill bearings?

Are there any specific alignment requirements for screw compressor bearings to optimize performance and reduce wear?

What are the best practices for installing and mounting bearings in engineering machinery to ensure proper functionality?

What are the potential risks associated with over-lubrication or under-lubrication of motor bearings?

How do factors such as load capacity and rotational speed requirements influence the selection of bearings for different agricultural applications?

Industry Knowledge Expansion

CONTACT US

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