Custom Double Row Cylindrical Roller Bearings Manufacturers, Suppliers

Double Row Cylindrical Roller Bearings Custom

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Double Row Cylindrical Roller Bearings Suppliers

NNU...W33
NNU...K/W33
NN...W33
NN...K/W33

Design Variants
Misalignment
Cage
Tolerance
Internal clearance

Double row cylindrical roller bearings are separable no-locating bearings, which make it mounting or dismounting easy, and both of the bearing rings may be mounted with heavy interference fit to shaft and housing so these bearings only have two basic type

NN type: inner ring with three integral flanges,outer ring without flange

NNU type: outer ting have three integral flanges,inner ring without flange.

These bearings are available either with or without tapered bores as standard, the suffix K means bore taper 1:12, the taper bores allow the radial internal clearance to be adjusted to the best value during mounting. These bearings also feature lubrication groove and holes on their outer rings as standard. Suffix W33.
Double row cylindrical roller bearings are not able to accommodate misalignments.
DHK double row cylindrical roller bearings are produced with roller riding solid brass cages as standard.

Double row cylindrical roller bearings are frequently used as spindle bearings, normally they are produced to special tolerance class SP.

DHK can provide these bearings with such as P5 class upon request.

Detailed tolerance values for DHK double row cylindrical roller bearings are listed in chapter of tolerance class SP, page 13.

Tolerances for DHK high precision Double row cylindrical roller bearings (excluding tapered roller bearings)

All dimensions shown in (mm):

Tolerances in (um):

Tolerance class SP of DHK high precision Double row cylindrical roller bearings

Inner Ring

PN/(Normal)

Nominal Bore diameter		Deviation	Variation	Deviation/ Variation			Ring width deviation	Ring width Variation	Radial runout	Side face runout	Side face runout
>	<=	△dmp	Vdp	△ds	Vdp	△d1mp -dmp	△Bs	vbs	kia	sd	sia
18 30		0 -6	3	+10 0	3	+4 0	0 -100	5	3	8	8
30 50		0 -8	4	+12 0	4	+6 0	0 -120	5	4	8	8
50 80		0 -9	5	+15 0	5	+8 0	0 -150	6	4	8	8
80 120		0 -10	5	+20 0	5	+8 0	0 -200	7	5	9	9
120 180		0 -13	7	+25 0	7	+10 0	0 -250	8	6	10	10
180 250		0 -15	8	+30 0	8	+12 0	0 -300	10	8	11	13
250 315		0 -18	9	+35 0	9	+12 0	0 -350	13	8	13	15
315 400		0 -23	12	+40 0	12	+14 0	0 -400	15	10	15	20
400 500		0 -27	14	+45 0	14		0 -450	17	10	17	23
500 630		0 -30		+50 0			0 -500	20	12	20	25
630 800		0 -40		+65 0			0 -750	30	15	23	30
800 1000		0 -50		+75 0			0 -1000	33	17	30	40
1000 1250		0 -65		+90 0			0 -1250	40	20	40	50

Outer ring

PN/(Normal)

Nominal outer diameter		Deviation	Variation	Radial runout	Side face runout	Side face runout
>	<=	△Dmp	VDp	Kea	SD	Sea
30 50		0 -7	4	5	8	8
50 80		0 -9	5	5	8	10
80 120		0 -10	5	6	9	11
120 150		0 -11	6	7	10	13
150 180		0 -13	7	8	10	14
180 250		0 -15	8	10	11	15
250 315		0 -18	9	11	13	18
315 400		0 -20	10	13	13	20
400 500		0 -23	12	15	15	23
500 630		0 -28	14	17	18	25
630 800		0 -35	18	20	20	30
800 1000		0 -40		25	30	40
1000 1250		0 -50		30	40	55

The width tolerances △Cs and VCs are identical to △Bs and Vbs of the inner ring of the same bearing.

Double row cylindrical roller bearings are frequently produced with reduced internal radial clearance group (C1). Must note bearing parts of these bearings could not be exchanged.

DHK can provide these bearings with other clearance group upon request.

For the detailed values please see the chapter of internal clearance of cylindrical roller bearings,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	Static load	Grease lubrication	Oil lubrication	E	F	Bs ≈	S ≈	≈
314897	280	410	150		1760	3750	1100	1700		313		2.5	61
315976B	280	470	200		2920	5600	1000	1500		392	13.9	4.7	150
BC2B320119	300	460	180	--	2600	5500	--	1500	--	339	--	4.9	118
BC2B322216	320	460	120	--	1720	3600	--	1400	--	364	--	3.9	70
315583C	320	480	175	--	2460	5400	--	1400	--	364	--	3.6	115
BC2B320118	340	520	305	--	3300	7100	--	1300	--	384	--	45	185
314563	350	500	190	--	2460	5700	--	1300	--	389	--	6	115
BC2B319878	350	520	150	--	2120	4500	--	1300	--	401	16.7	4.9	220
BC2B320075	360	500	125	--	1790	3650	--	1300	--	394	16.7	2.7	72
BC2B322217	360	500	125	--	2050	4300	--	1300	--	394	--	5	80
BC2B320299	360	510	190	--	2600	6100	--	1300	475	--	--	4.2	120
BC2B319961	370	520	220	--	2750	6700	--	1300	--	409	--	16.7	130
316062	380	540	150	--	2510	5500	--	1200	--	421	--	2	110
BC2B320041	380	540	200	--	2860	6800	--	1200	--	422	--	4.9	145
314987B	400	560	205	--	3140	7800	--	1200	--	445	--	2.7	160
314987C	400	560	205	--	3140	7800	--	1200	--	445	--	2.7	160
315802	400	590	220	--	3690	8300	--	1100	--	450	--	5.1	210
BC2B3265363/HA4	400	600.19	200	--	3470	7200	--	1100	557	--	--	4.5	205
BC2B326880/HB1	400	600.19	200	--	3470	7200	--	1100	--	449	16.7	5	200
316019	410	600	140	--	3800	8650	--	1100	--	460	--	6.3	215
BC2B326137/HB1	420	580	130	--	2380	5300	--	1100	--	460	--	4.4	110
313555A	420	580	160	--	2330	5400	--	1100	--	463	--	4.7	125
313555B	420	580	160	--	2330	5400	--	1100	--	463	16.7	4.7	125
313555C	420	580	160	--	2330	5400	--	1100	--	463	--	7.1	125
314982	420	600	205	--	3580	8800	--	1100	--	470	--	3.6	205
314931	420	620	220	--	3470	7800	--	1100	--	473	--	4.4	220
316077A	420	620	225	--	3910	9800	--	1000	--	487	--	2.7	220
BC2B316521	420	640	230	--	4570	9800	--	1000	--	482	--	5.5	250
BCB322969/HB1	457.2	660.4	228.6	--	3690	8150	--	950	--	508	--	15.6	235
316739	460	650	235	--	4400	11200	--	1000	--	509	--	3.4	260
BC2-8004/HA1	460	780	280	--	5610	10400	--	850	--	543	--	30	540
316848A	480	680	250	--	4730	12000	--	950	--	532	--	8	305
316189	480	700	260	--	5390	12500	--	900	--	535	--	4.1	345
BC2B326196/HA1	487.98	637	175	--	3000	7600	--	950	605.7	--	--	4	170
316639AG	490	694	174	--	3740	9000	--	900	--	542	--	5.6	215
319254	500	650	130	--	2050	5100	--	950	--	542	--	6	120
314990A	500	680	225	--	4130	11000	--	900	--	550	--	3.9	250
BC2B320570	500	700	170	--	2700	5400	--	900	--	553	--	11	210
314419	500	720	218	--	4730	10800	--	850	--	554	--	3.4	310
BC2-8008/HB1	500	730	305	--	6270	15000	--	850	--	556	--	10	415
BC2B320996	510	760	400	--	6050	13200	--	850	--	570	--	70.9	485
312844	529.91	870	335	--	7810	16600	--	750	--	615	--	11.4	830
BC2B316536	530	760	260	--	5830	14300	--	800	--	587	--	4.3	510
BC2B326064/HA1	530	780	225	--	4400	9500	--	800	--	601	--	11.2	735
315040	530	780	250	--	4680	10200	--	800	--	591	--	11.5	400
BC2B320117/HA4	530	780	475	--	7210	17300	--	800	--	590	--	100	560
464787	546.05	698.5	215.9	--	3580	7850	--	850	--	582.3	--	5.8	215
316115	550	800	260	--	5830	13400	--	750	--	612	--	6.2	455
BC2B326061/HA1	560	735	170	--	2920	6950	--	800	--	603	22.3	8.2	465
313191	560	740	180	--	2700	7350	--	800	--	618	--	13	215
BC2B319584/HA1	600	820	287.5	--	6440	18000	--	700	--	660	--	4.9	470
BC2-8012/HB1	600	820	365	--	7810	21200	--	700	--	655	22.3	7	570
BCS2-8012/HB1	630	850	218	--	4400	11800	--	600	--	690	--	15	360
BC2B319943	635	762	101.6	--	1680	4550	--	750	730.25	--	22.3	3.5	86.5
BC2B326894/HB1	650	920	335	--	8580	23200	--	630	--	723	--	5.3	740
313477B	660	880	225	--	4180	11800	--	670	--	727	--	6	390
BC2-8074/HA5	690	980	365	--	6050	13400	--	600	--	759	--	9.5	910
BC2-8015/HB1	690	980	550	--	9900	27000	--	600	--	767.5	--	10.5	1045
BC2B322191	723.98	927.2	190	--	4400	12000	--	600	878	--	22.3	4.3	340
314420	750	1000	250	--	6160	16600	--	560	--	816	--	5.5	575
BC2B326379/HA4	800	1260	375	--	12800	28000	--	430	1163	--	--	11	1850
BC2-8022/HA1	950	1360	420	--	14000	33500	--	360	1279	--	22.3	11	1900
BC2B326372/HA1	1311	1720	300	--	12500	34500	--	240	1636	--		7	1820

Ningbo DHK Precision Bearing Co., Ltd.

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DHK has passed IATF16949 quality system certification and ISO14001 environmental management system certification；and DHK is a national high-tech enterprise.

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Industry Knowledge Expansion About This Category

In the dynamic landscape of modern engineering and industrial machinery, precision, durability, and reliability are paramount. The spotlight falls on the Double Row Cylindrical Roller Bearings, an engineering marvel that stands as a testament to innovation and excellence.

1. What Distinguishes Double Row Cylindrical Roller Bearings?

Unmatched Load Distribution and Rigidity

When it comes to bearing heavy loads and navigating the challenges of shock forces, Double Row Cylindrical Roller Bearings shine as a reliable solution. The ingenious arrangement of two sets of rollers results in a higher degree of load distribution, enhancing radial rigidity and minimizing the risk of premature wear. This load-sharing design ensures that the bearing sustains its performance even under the most arduous conditions.

Enhanced Axial Load Capacity

The ability to handle both radial and axial loads is a defining feature of Double Row Cylindrical Roller Bearings. By employing two rows of rollers set parallel to each other, these bearings exhibit remarkable axial load-carrying capabilities. This makes them a prudent choice for applications where axial forces and moments are integral, ensuring stability and smooth operation.

Precise Tolerance and Low Friction

In the realm of engineering, precision translates to superior performance. Double Row Cylindrical Roller Bearings are meticulously crafted to achieve exacting tolerances and minimal friction. The result is a reduction in energy loss due to friction, leading to efficient and reliable operation. Additionally, the low friction characteristics contribute to lower heat generation, prolonging the life of the bearing and the machinery it supports.

2. How Can Double Row Cylindrical Roller Bearings Elevate Your Operations?

Optimized Performance for Complex Systems

Modern industries often rely on complex systems where a myriad of forces interact. Double Row Cylindrical Roller Bearings offer a tangible advantage in such scenarios. Their capacity to maintain equilibrium amidst diverse loads, speeds, and forces ensures smoother and more efficient operation. This translates to minimized wear and tear, thus bolstering the longevity and reliability of the machinery.

Reduced Downtime and Maintenance Costs

Industrial disruptions caused by maintenance can have far-reaching financial implications. With the robust build and resilience of Double Row Cylindrical Roller Bearings, the frequency of maintenance intervals can be extended. This leads to reduced downtime, enabling a continuous and uninterrupted production process. Moreover, the decreased need for frequent maintenance contributes to substantial cost savings over time.

Improved Application Flexibility

Engineering solutions are often demanded to be adaptable without compromising performance. Double Row Cylindrical Roller Bearings excel in this regard, providing the flexibility required in designs without compromising on load-bearing capabilities. Whether it's in industrial machinery, automotive systems, or heavy equipment, these bearings ensure stability, precision, and reliability.

3. What Lies Ahead for Double Row Cylindrical Roller Bearings in the Global Market?

Technological Advancements

As industries progress, innovations continue to reshape possibilities. Double Row Cylindrical Roller Bearings are poised to benefit from ongoing technological advancements. Manufacturers are likely to integrate advanced materials, coatings, and lubrication techniques, further enhancing their capacity to withstand diverse operational challenges and harsh environments.

Market Penetration and Growth

The path ahead for Double Row Cylindrical Roller Bearings is marked by sustained market penetration and growth. Their proven ability to enhance load-bearing capacities, operational reliability, and efficiency ensures their continued significance across various industries. As the industrial landscape evolves, these bearings are poised to maintain and expand their market share.

Sustainability and Eco-Friendly Design

With the global focus on sustainability, manufacturers are likely to explore ways to make Double Row Cylindrical Roller Bearings more environmentally friendly. The integration of eco-friendly materials, streamlined manufacturing processes, and energy-efficient designs will contribute to a more sustainable future, aligning with the broader industry trend toward responsible manufacturing.

Seizing Opportunities with Double Row Cylindrical Roller Bearings: From innovation to performance, reliability to sustainability, these bearings embody the pinnacle of engineering excellence. Connect with us to explore how these remarkable bearings can elevate your projects, ensuring precision, longevity, and success in every endeavor.

Tel
+86-574-86597612
Email
ken@dhk-intl.com
Phone
+86-13957821917
Fax
+86-574-86597652

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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?

What role does lubrication play in ensuring the optimal performance of automobile bearings?

How to determine the appropriate interval for screw compressor bearing replacement?

Industry Knowledge Expansion About This Category

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Latest News

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?

What role does lubrication play in ensuring the optimal performance of automobile bearings?

How to determine the appropriate interval for screw compressor bearing replacement?

Industry Knowledge Expansion About This Category

CONTACT US

Tel

Email

Phone

Fax

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