OEM/ODM Series 240-Spherical Roller Bearings Company, Factory - Ningbo DHK Precision Bearing Co., Ltd.

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Series 240-Spherical Roller Bearings

Design Variants
Tolerance
Internal clearance

Normally spherical roller bearings are non- separable double-row radial bearings, produced in open design as standard. On request, DHK can also design and produce single row spherical roller bearings or split outer ring spherical roller bearings.

Depending on their size and series DHK spherical roller bearings are produced in several different design variations, different designs have different spherical roller design and are fitted with different cages.

Bearings of the design C have symmetric spherical rollers and centre loose rib are fitted with two pieces pressed steel cage as standard.

Bearings of the design MB have a centre flange, with asymmetrical rollers and two pieces inner ring riding and machined solid brass cages. This design is produced for the large spherical roller bearings as standard. Such bearings have higher speed capacity.

Bearings of the design CA don t have centre flange. They have symmetric spherical rollers and are fitted with one piece machined solid brass cage.

Bearings of the design MA have a loose centre guide ring. They have symmetric rollers, are fitted with one piece machined and outer ring riding solid brass cage. The bearings of this design are especially for use in vibrating applications.

The spherical roller bearings are also frequently used with tapered bores (i.e. taper 1:12) namely suffix K or the taper bore is 1:30 namely suffix K30 for series 240 and 241 as standard. Such bearings are very easy to mount. The facility of mounting these bearing types using adapter (H) and withdrawal sleeves (AH) enables mounting directly onto drawn or fine turned seats of shaft for applications where high running accuracy is not necessary.

Lubricating groove and holes DHK spherical roller bearings with the exception of series 213...are produced incorporating simple re-lubrication features as standard, e.g. a circumferential groove and lubricating holes in

the outer ring. These features are identified with the suffix W33.

Misalignment

Spherical roller bearings are optimum to compensate misalignments. The maximum permissible misalignment from their centre position ( ), is dependant upon bearing design, series and actual operating conditions. The following values are maximum permissible.

Bearingseries Maximum permissible misalignment

213 1

222 1.5

223 2

230 1.5

231 1.5

232 2.5

239 1.5

240 2

241 2.5

DHK spherical roller bearings are produced with normal tolerance class (PN) as standard. Values for the individual tolerance classes are listed in the tables of the chapter bearing data / tolerance page 8.

Tolerances for DHK spherical 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

For the internal clearance group of spherical roller bearings a distinction must be made between bearings with cylindrical or tapered bores.DHK spherical roller bearings are produced to each relevant normal clearance group CN as standard.DHK can also produce spherical roller bearings with larger radial clearance (groups C3, C4 or C5) or even reduced radial clearance (group C2) on order request. The values are confirmed to ISO5753. Detailed values of radial clearance groups are listed in the following tables.

Radial internal clearance of DHK spherical roller bearings Spherical roller bearings with cylindrical bore

Bore diameter
>	<=	C2 Min max	CN Min max	C3 Min max	C4 Min max	C5 Min max
-- 24		10 20	20 35	35 45	45 60	60 75
24 30		15 25	25 40	40 55	55 75	75 95
30 40		15 30	30 45	45 60	60 80	80 100
40 50		20 35	35 55	55 75	75 100	100 125
50 65		20 40	40 65	65 90	90 120	120 150
65 80		30 50	50 80	80 110	110 145	145 180
80 100		35 60	60 100	100 135	135 180	180 225
100 120		40 75	75 120	120 160	160 210	210 260
120 140		50 95	95 145	145 190	190 240	240 300
140 160		60 110	110 170	170 220	220 280	280 350
160 180		65 120	120 180	180 240	240 310	310 390
180 200		70 130	130 200	200 260	260 340	340 430
200 225		80 140	140 220	220 290	290 380	380 470
225 250		90 150	150 240	240 320	320 420	420 520
250 280		100 170	170 260	260 350	350 460	460 570
280 315		110 190	190 280	280 370	370 500	500 630
315 355		120 200	200 310	310 410	410 550	500 690
355 400		130 220	220 340	340 450	450 600	600 750
400 450		140 240	240 370	370 500	500 660	660 820
450 500		140 260	260 410	410 550	550 720	720 900
500 560		150 280	280 440	440 600	600 780	780 1000
560 630		170 310	310 480	480 650	650 850	850 1100
630 710		190 350	350 530	530 700	700 920	920 1190
710 800		210 390	390 580	580 770	770 1010	1010 1300
800 900		230 430	430 650	650 860	860 1120	1120 1440
900 1000		260 480	480 710	710 930	930 1220	1220 1570
1000 1120		290 530	530 780	780 1020	1020 1330	1330 1770
1120 1250		320 580	580 860	860 1120	1120 1460	1460 1870
1250 1400		350 640	640 950	950 1240	1240 1620	1620 2060
1400 1600		400 720	720 1060	1060 1380	1380 1800	1800 2300
1600 1800		450 810	810 1180	1180 1550	1550 2000	2000 2550

Spherical roller bearings with tapered bore

Bore diameter
>	<=	C2 Min max	CN Min max	C3 Min max	C4 Min max	C5 Min max
-- 24		15 25	25 35	35 45	45 60	60 75
24 30		20 30	30 40	40 55	55 75	75 95
30 40		25 35	35 50	50 65	65 85	85 105
40 50		30 45	45 60	60 80	80 100	100 130
50 65		40 55	55 75	75 95	95 120	120 160
65 80		50 70	70 95	95 120	120 150	150 200
80 100		55 80	80 110	110 140	140 180	180 230
100 120		65 100	100 135	135 170	170 220	220 280
120 140		80 120	120 160	160 200	200 260	260 330
140 160		90 130	130 180	180 230	230 300	300 380
160 180		100 140	140 200	200 260	260 340	340 430
180 200		110 160	160 220	220 290	290 370	370 470
200 225		120 180	180 250	250 320	320 410	410 520
225 250		140 200	200 270	270 350	350 450	450 570
250 280		150 220	220 300	300 390	390 490	490 620
280 315		170 240	240 330	330 430	430 540	540 680
315 355		170 270	270 360	360 470	470 590	590 740
355 400		210 300	300 400	400 520	520 650	650 820
400 450		230 330	330 440	440 570	570 720	720 910
450 500		260 370	370 490	490 630	630 790	790 1000
500 560		290 410	410 540	540 680	680 870	870 1100
560 630		320 460	460 600	600 760	760 980	980 1230
630 710		350 510	510 670	670 850	850 1090	1090 1360
710 800		390 570	570 750	750 960	960 1220	1220 1500
800 900		440 640	640 840	840 1070	1070 1370	1370 1690
900 1000		490 710	710 930	930 1190	1190 1520	1520 1860
1000 1120		530 770	770 1030	1030 1300	1300 1670	1670 2050
1120 1250		270 830	830 1120	1120 1420	1420 1830	1830 2250
1250 1400		620 910	910 1230	1230 1560	1560 2000	2000 2450
1400 1600		680 1000	1000 1350	1350 1720	1720 2200	2200 2700
1600 1800		750 1110	1110 1500	1500 1920	1920 2400	2400 2950

Model	Dimensions				Rated load		Extreme speed		Calculation factor				Weight
Model	d	D	B	r1,r2 min	Dynamic load	Static load	Grease lubrication	Oil lubrication	e	Y1	Y2	Yo	[kg]
24024c	120	180	60	2	460	800	1500	2000	0.29	2.3	3.4	2.3	5.36
24024ck30	120	180	60	2	460	800	1500	2000	0.29	2.3	3.4	2.3	5.36
24026c	130	200	69	2	530	900	1200	1600	0.31	2.2	2.3	2.2	7.95
24026ck30	130	200	69	2	530	900	1200	1600	0.31	2.2	2.3	2.2	7.95
24028C	140	210	69	2	550	990	1100	1500	0.29	2.3	3.5	2.3	8.42
24028CK30	140	210	69	2	550	990	1100	1500	0.29	2.3	3.5	2.3	8.42
24030c	150	225	75	2.1	620	1140	1300	1700	0.29	2.3	3.5	2.3	10.5
24030ck30	150	225	75	2.1	620	1140	1300	1700	0.29	2.3	3.5	2.3	10.5
24032c	160	240	80	2.1	720	1320	1000	1300	0.29	2.3	3.4	2.3	12.7
24032ck30	160	240	80	2.1	720	1320	1000	1300	0.29	2.3	3.4	2.3	12.7
24034MB	170	260	90	2.1	880	1610	1000	1300	0.34	2	3	2	17.8
24034K30.MB	170	260	90	2.1	880	1610	1000	1300	0.34	2	3	2	17.8
24036MB	180	280	100	2.1	1030	1900	900	1200	0.36	1.9	2.8	1.9	23.4
24036K30.MB	180	280	100	2.1	1030	1900	900	1200	0.36	1.9	2.8	1.9	23.4
24038MB	190	290	100	2.1	1080	1980	850	1100	0.34	2	3	2	24.5
24038K30.MB	190	290	100	2.1	1080	1980	850	1100	0.34	2	3	2	24.5
24040MB	200	310	109	2.1	1140	2280	850	1100	0.35	1.9	2.9	1.9	30.5
24040K30.MB	200	310	109	2.1	1140	2280	850	1100	0.35	1.9	2.9	1.9	30.5
22240ck	200	360	98	4	1250	2020	1100	1400	0.29	2.3	3.9	2.3	44.4
24044MB	220	340	118	3	1400	2700	750	1000	0.34	2	2.9	1.9	39.5
24044K30.MB	220	340	118	3	1400	2700	750	1000	0.34	2	2.9	1.9	39.5
24048K.MB	240	360	118	3	1460	2841	750	1000	0.32	2.1	3.1	2.1	42.5
24048MB	240	360	118	3	1460	2841	750	1000	0.32	2.1	3.1	2.1	42.5
24052K30.MB	260	400	140	4	1775	3494	600	800	0.35	1.9	2.9	1.9	66
24052MB	260	400	140	4	1775	3494	600	800	0.35	1.9	2.9	1.9	66
24056K30.MB	280	420	140	4	2000	4000	560	750	0.33	2	3	2	68.5
24056MB	280	420	140	4	2000	4000	560	750	0.33	2	3	2	68.5
24060K30.MB	300	460	160	4	2385	4702	560	759	0.35	2	2.9	1.9	97
24060MB	300	460	160	4	2385	4702	560	759	0.35	2	2.9	1.9	97
24064K30.MB	320	480	160	4	2500	5240	530	700	0.33	2.1	3.1	2	106
24064MB	320	480	160	4	2500	5240	530	700	0.33	2.1	3.1	2	106
24068K30.MB	340	520	180	5	3100	6550	480	600	0.34	2	2.9	1.9	143
24068MB	340	520	180	5	3100	6550	480	600	0.34	2	2.9	1.9	143
24072K30.MB	360	540	180	5	3150	6530	480	630	0.33	2.1	3.1	2	145
24072MB	360	540	180	5	3150	6530	480	630	0.33	2.1	3.1	2	145
24076K30.MB	380	560	180	5	3150	6710	450	600	0.31	2.2	3.2	2.1	152
24076MB	380	560	180	5	3150	6710	450	600	0.31	2.2	3.2	2.1	152
24080MB	400	600	200	5	3610	7545	430	460	0.33	2.1	2.4	2	205
24080K30.MB	400	600	200	5	3610	7545	430	460	0.33	2.1	2.4	2	205
24084K30.MB	420	620	200	5	4000	8800	380	480	0.32	2.1	3.2	2.1	214
24084MB	420	620	200	5	4000	8800	380	480	0.32	2.1	3.2	2.1	214
24088K30.MB	440	650	212	6	4300	9650	360	450	0.32	2.1	3.2	2.1	249
24088MB	440	650	212	6	4300	9650	360	450	0.32	2.1	3.2	2.1	249
24092K30.MB	460	680	218	6	4370	9570	380	500	0.31	2.2	..3	2.1	280
24092MB	460	680	218	6	4370	9570	380	500	0.31	2.2	3.2	2.1	280
24096K.30.MB	480	700	218	6	4900	11200	340	430	0.3	2.3	3.3	2.2	288
24096MB	480	700	218	6	4900	11200	340	430	0.3	2.3	3.3	2.2	288
240/500K30.MB	500	720	218	6	4900	11200	320	400	0.29	2.3	3.5	2.3	297
240/500MB	500	720	218	6	4900	11200	320	400	0.29	2.3	3.5	2.3	297
240/530MB	530	780	250	6	5640	12800	340	450	0.31	2.2	3.2	2.1	410
240/530K30.MB	530	780	250	6	5640	12800	340	450	0.31	2.2	3.2	2.1	410
240/560K30.MB	560	820	258	6	6400	14600	280	360	0.31	2.2	3.3	2.2	469
240/560MB	560	820	258	6	6400	14600	280	360	0.31	2.2	3.3	2.2	469
240/600K30.MB	600	870	272	6	7100	16600	260	340	0.31	2.2	3.3	2.2	550
240/600MB	600	870	272	6	7100	16600	260	340	0.31	2.2	3.3	2.2	550
240/630K30.MB	630	920	290	7.5	8000	19000	260	340	0.31	2.2	3.3	2.2	661
240/630MB	630	920	290	7.5	8000	19000	260	340	0.31	2.2	3.3	2.2	661
240/670K30.MB	670	980	308	7.5	9000	21600	240	320	0.31	2.2	3.3	2.2	802
240/670MB	670	980	308	7.5	9000	21600	240	320	0.31	2.2	3.3	2.2	802
240/710K30.MB	710	1030	315	7.5	9500	22800	220	300	0.3	2.3	3.4	2.2	889
240/710MB	710	1030	315	7.5	9500	22800	220	300	0.3	2.3	3.4	2.2	889
240/750K30.MB	750	1090	335	7.5	9960	23700	220	300	0.29	2.3	3.5	2.3	1065
240/750MB	750	1090	335	7.5	9960	23700	220	300	0.29	2.3	3.5	2.3	1065
240/800K30.MB	800	1150	345	7.5	11600	28500	190	260	0.29	2.3	3.5	2.3	1200
240/800MB	800	1150	345	7.5	11600	28500	190	260	0.29	2.3	3.5	2.3	1200
240/900MB	900	1280	375	7.5	14000	36500	170	220	0.28	2.4	3.6	2.4	1600
240/900K30.MB	900	1280	375	7.5	14000	36500	170	220	0.28	2.4	3.6	2.4	1600
240/950MB	950	1360	412	7.5	16300	41500	160	200	0.29	2.3	3.5	2.3	2010
240/950K30.MB	950	1360	412	7.5	16300	41500	160	200	0.29	2.3	3.5	2.3	2010
240/1000MB	1000	1420	412	7.5	16600	42500	150	190	0.28	2.4	3.6	2.3	2150
240/1000k30.MB	1000	1420	412	7.5	16600	42500	150	190	0.28	2.4	3.6	2.3	2150
240/1060MB	1060	1500	438	9.5	18600	50000	140	180	0.27	0.27	3.7	2.4	2530
240/1060K30.MB	1060	1500	438	9.5	18600	50000	140	180	0.27	0.27	3.7	2.4	2530
240/1120MB	1120	1580	462	9.5	20800	55000	140	180	0.28	2.4	3.6	2.4	2910
240/1120K30.MB	1120	1580	462	9.5	20800	55000	140	180	0.28	2.4	3.6	2.4	2910

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Industry Knowledge Expansion

1. Performance Factors of Series 240-Spherical Roller Bearings

Spherical Roller Bearings, particularly Series 240 bearings, are engineered to deliver exceptional performance under demanding operational conditions. This section aims to delve deeper into the critical performance factors that distinguish Series 240 bearings, highlighting their capabilities and advantages in various industrial applications.

a)Dynamic Load Rating (C): Dynamic load rating (C) denotes the maximum load capacity that a bearing can withstand while maintaining reliable operation over its service life. Series 240-Spherical Roller Bearings are designed with optimized internal geometries and robust materials to accommodate high dynamic loads. This attribute is particularly advantageous in applications where equipment is subjected to fluctuating loads or shock loads, such as in heavy machinery, conveyor systems, and automotive transmissions. The high dynamic load rating of Series 240 bearings ensures that they can withstand the rigors of continuous operation, minimizing the risk of premature fatigue failure and enhancing equipment reliability.

b)Static Load Rating (Co): In addition to dynamic load rating, the static load rating (Co) of Series 240 bearings is equally significant in applications where equipment may be subjected to prolonged periods of static loading. The static load rating denotes the maximum load that a bearing can support without experiencing permanent deformation or damage. Series 240-Spherical Roller Bearings exhibit impressive static load ratings, providing a safety margin against overloading and ensuring stability in applications where equipment may be stationary for extended durations.

2.Applications Across Industries: Harnessing the Versatility of Series 240-Spherical Roller Bearings

Series 240-Spherical Roller Bearings stand as versatile components capable of fulfilling critical roles across a spectrum of industries.

a)Heavy Machinery: One of the primary domains where Series 240 bearings excel is in heavy machinery applications. Industries such as mining, construction, and material handling rely on robust bearings to withstand the extreme forces and harsh operating conditions inherent in these environments. Series 240 bearings, with their high load-carrying capacity and durability, are integral components in heavy-duty equipment such as excavators, bulldozers, cranes, and loaders. These bearings facilitate smooth rotation and movement of machine components, ensuring optimal performance and longevity in demanding working environments.

b)Power Generation: In the realm of power generation, Series 240-Spherical Roller Bearings play a crucial role in various equipment and machinery. Whether in traditional thermal power plants, hydroelectric facilities, or emerging renewable energy installations, bearings are essential for the smooth operation of turbines, generators, and auxiliary equipment. Series 240 bearings provide the requisite support and stability to rotating components, enabling efficient power generation while withstanding the high speeds and heavy loads characteristic of power generation applications.

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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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Bearingseries	Maximum permissible misalignment
213	1
222	1.5
223	2
230	1.5
231	1.5
232	2.5
239	1.5
240	2
241	2.5

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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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