OEM/ODM Series NJ-Single Row Full Complement Cylindrical Roller Bearings Company, Factory

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Series NJ-Single Row Full Complement Cylindrical Roller Bearings

NJ23...VH
NC
NCF

Design Variants
Misalignment
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.

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		Bearing dimensions					Extreme speed		Weight
Model	d	D	B	r1,r2 Min	r3,r4 min	Dynamic load Cr	Static load Cor	E	F	d1	D1	s	Grease lubrication	Oil lubrication	Weight
NJ2305VH	25	62	24	1.1	--	68.2	82.8	--	31.71	36.3	48.2	1.7	3000	5300	0.4
NJ2306VH	30	72	27	1	--	84	102	--	--	43.3	56.5	1.8	1900	4000	0.56
NJ2307VH	35	80	31	1.5	--	108	124	--	44.74	50.3	65.8	2	1600	3400	0.73
NJ2308VH	40	90	33	1.5	--	145	184	--	51.1	57.5	76	2.4	1400	3000	1
NJ2309VH	45	100	36	1.5	--	170	220	--	56.13	62.5	81.8	2.4	1300	2800	1.35
NJ2310VH	50	110	40	2	--	198	250	--	60.7	68.3	90.3	2.6	1100	2400	1.85
NJ2311VH	55	120	43	2	--	230	260	--	67.1	75.5	98.6	2.6	1000	2200	2.3
NJ2312VH	60	130	46	2.1	--	260	352	--	73.68	82.1	106	3	950	2000	2.83
NJ2313VH	65	140	48	2.1	--	302	358	--	80.71	89.4	117	3	900	1900	3.48
NJ2314VH	70	150	51	2.1	--	335	455	--	84.22	93.8	121	3	850	1800	4.4
NJ2315VH	75	160	55	2.1	--	390	550	--	91.25	100.8	132.5	3	750	1600	5.18
NJ2316VH	80	170	58	2.1	--	455	550	--	98.3	109	141	4	700	1500	6.4
NJ2317VH	85	180	60	3	--	482	695	--	107.03	117.4	151.5	4	670	1400	7.3
NJ2318VH	90	190	64	3	--	520	790	--	108.8	121	156	4	670	1400	8.75
NJ2320VH	100	215	73	3	--	704	1030	--	122.8	136	176	4.5	600	1200	13
NJ2322VH	110	240	80	3	--	826	1040	--	134.3	151	198	5	560	1100	17.8
NJ2324VH	120	260	86	3	--	920	1300	--	147.4	164	211	5.5	530	1000	22.3
NJ2326VH	130	280	93	4	--	1080	1660	--	157.95	174.1	229.6	6	500	950	28
NJ2328VH	140	300	102	4	--	1250	1910	--	168.5	184.7	240.5	6.5	450	850	35.5
NJ2330VH	150	320	108	4	--	1450	2240	--	182.5	203	261	6.5	430	800	42.5
NJ2332VH	160	340	114	4	--	1630	2550	--	196.55	216.7	286	7	400	750	48.8
NJ2334VH	170	360	120	3	--	1760	2400	--	203.56	224.5	296.4	7	450	800	59.2
NJ2336VH	180	380	126	3	--	1900	12700	--	221.74	242.6	314.6	9	400	700	69.6
NJ2338VH	190	400	132	4	--	2080	2900	--	224.6	247.6	327	7	400	700	80

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Industry Knowledge Expansion

1. Design Ingenuity: Understanding the Anatomy

Series NJ-Single Row Full Complement Cylindrical Roller Bearings are the culmination of meticulous engineering and innovative design principles. At the core of their functionality lies a carefully crafted anatomy, meticulously tailored to meet the demands of modern industrial applications. These bearings feature a single row of cylindrical rollers, strategically positioned within the bearing assembly to distribute radial loads evenly. The integration of integral flanges on both the inner and outer rings enhances the bearing's ability to accommodate minor thrust forces in one direction. This design feature not only ensures optimal load distribution but also promotes operational stability, mitigating the risk of premature wear and tear. The incorporation of integral flanges serves to guide the rollers and prevent them from coming into direct contact with each other or with the raceways, thereby minimizing friction and reducing heat generation. This results in smoother operation and prolonged bearing life, contributing to overall system reliability and efficiency. The meticulous attention to detail in the design of Series NJ bearings extends to every facet of their construction. From the selection of high-quality materials to the precision machining of components, each element is engineered to exacting standards to uphold the bearing's integrity and performance under demanding operating conditions. The design ingenuity of Series NJ bearings represents a harmonious blend of form and function, where every component is optimized to deliver unparalleled reliability, efficiency, and longevity in a diverse range of industrial applications.

2. Enhanced Load Capacity: Harnessing Full Complement Rollers

One of the defining features of Series NJ-Single Row Full Complement Cylindrical Roller Bearings is their utilization of full complement cylindrical rollers. Unlike bearings with cage assemblies, which space out the rollers, full complement bearings maximize the number of rollers within the bearing assembly. This design choice significantly enhances the bearing's load-carrying capacity, allowing it to withstand heavier radial loads with ease. By distributing the load over a greater number of rollers, the risk of localized stress concentrations is minimized, thereby reducing the likelihood of premature fatigue and failure. The absence of a cage assembly eliminates potential frictional losses associated with cage-to-roller and roller-to-roller interactions, further optimizing the bearing's efficiency. As a result, Series NJ bearings exhibit superior performance under heavy radial loads, making them well-suited for applications where reliability and durability are paramount. In addition to their enhanced load capacity, full complement rollers also contribute to smoother operation and reduced noise levels, enhancing the overall user experience. This combination of robust load-carrying capability and operational efficiency makes Series NJ bearings the preferred choice for critical applications across a wide range of industries.

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ken@dhk-intl.com
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+86-13957821917
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Latest News

How do Thrust Spherical Roller Bearings perform in heavy-duty applications with high axial loads?

How do Four Row Cylindrical Roller Bearings handle both radial and axial loads simultaneously?

What are the key advantages of using Four Row Cylindrical Roller Bearings in heavy-duty applications?

In what types of machinery or systems are paired single-row tapered roller bearings most commonly used?

How does the internal geometry of spherical roller bearings impact their load-carrying capacity?

What are the key benefits of using spherical roller bearings in heavy-duty applications?

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Ningbo DHK Precision Bearing Co., Ltd.

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Click to view our factory

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Latest News

How do Thrust Spherical Roller Bearings perform in heavy-duty applications with high axial loads?

How do Four Row Cylindrical Roller Bearings handle both radial and axial loads simultaneously?

What are the key advantages of using Four Row Cylindrical Roller Bearings in heavy-duty applications?

In what types of machinery or systems are paired single-row tapered roller bearings most commonly used?

How does the internal geometry of spherical roller bearings impact their load-carrying capacity?

What are the key benefits of using spherical roller bearings in heavy-duty applications?

Industry Knowledge Expansion

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