OEM/ODM Series 222-Spherical Roller Bearings Company, Factory - Ningbo DHK Precision Bearing Co., Ltd.

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Series 222-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]
22205c	25	52	18	1	43	46	7500	10000	0.35	1.9	2.9	1.8	0.18
22205ck	25	52	18	1	43	46	7500	10000	0.35	1.9	2.9	1.8	0.18
22206c	30	62	20	1	59	62	6300	8500	0.36	1.9	2.8	1.9	0.4
22206ck	30	62	20	1	59	62	6300	8500	0.36	1.9	2.8	1.9	0.4
22207c	35	72	23	1.1	81	88	5300	7000	0.36	1.9	2.8	1.9	0.41
22207ck	35	72	23	1.1	81	88	5300	7000	0.36	1.9	2.8	1.9	0.41
22208c	40	80	23	1.1	88	98	4800	6300	0.31	2.2	3.2	2.1	0.49
22208ck	40	80	23	1.1	88	98	4800	6300	0.31	2.2	3.2	2.1	0.49
22209c	45	85	23	1.1	93	105	4500	600	0.3	2.3	3.4	2.2	0.54
22209ck	45	85	23	1.1	93	105	4500	6000	0.3	2.3	3.4	2.2	0.54
22210c	50	90	23	1.1	100	120	4000	5300	0.26	2.6	3.4	2.5	0.61
22210ck	50	90	23	1.1	100	120	4000	5300	0.26	2.6	3.4	2.5	0.61
22211c	55	100	25	1.5	120	140	3800	5000	0.27	2.5	3.9	2.5	0.8
22211ck	55	100	25	1.5	120	140	3800	5000	0.27	2.5	3.9	2.5	0.8
22212c	60	110	28	1.5	145	175	3400	4500	0.27	2.5	3.8	2.4	1.06
22212ck	60	110	28	1.5	145	175	3400	4500	0.27	2.5	3.8	2.4	1.06
22213c	60	120	31	1.5	180	220	3000	4000	0.28	2.4	3.7	2.4	1.44
22213ck	60	120	31	1.5	180	220	3000	4000	0.28	2.4	3.7	2.4	1.44
22214c	70	125	31	1.5	180	225	2800	3800	0.26	2.6	3.6	2.6	1.52
22214ck	70	125	31	1.5	180	225	2800	3800	0.26	2.6	3.6	2.6	1.52
22215c	75	130	31	1.5	190	250	2800	3800	0.24	2.8	3.9	2.7	1.61
22215ck	75	130	31	1.5	190	250	2800	3800	0.24	2.8	3.9	2.7	1.61
22216c	80	140	33	2	210	275	2600	3400	0.25	2.6	4.1	2.6	1.97
22216ck	80	140	33	2	210	275	2600	3400	0.25	2.6	4.1	2.6	1.97
22217c	85	150	36	2	250	325	2400	3200	0.216	2.6	4	0.6	2.47
22217ck	85	150	36	2	250	325	2400	3200	0.216	2.6	4	0.6	2.47
22218c	90	160	40	2	305	410	2200	3000	0.27	2.5	3.9	2.5	3.18
22218ck	90	160	40	2	305	410	2200	3000	0.27	2.5	3.9	2.5	3.18
22219c	95	170	43	2.1	340	450	2200	2800	0.24	2.8	3.8	2.8	3.86
22219ck	95	170	43	2.1	340	450	2200	2800	0.24	2.8	3.8	2.8	3.86
2222oc	100	180	46	2.1	375	500	2200	2800	0.24	2.8	4.2	2.8	4.69
22220ck	100	180	46	2.1	375	500	2200	2800	0.24	2.8	4.2	2.8	4.69
22222c	110	200	53	2.1	455	585	2000	2800	0.25	2.7	4.2	2.5	6.7
22222ck	110	200	53	2.1	455	585	2000	2800	0.25	2.7	4.2	2.5	6.7
23222c	110	200	69.8	2.1	620	850	1400	1800	0.33	2	3	2	10.8
23222ck	110	200	69.8	2.1	620	850	1400	1800	0.33	2	3	2	10.8
22224c	120	215	58	2.1	560	800	1700	2200	0.29	2.3	4	2.3	8.44
22224ck	120	215	58	2.1	560	800	1700	2200	0.29	2.3	4	2.3	8.44
22226c	130	230	64	3	660	960	1700	2200	0.29	2.3	3.5	2.3	10.5
22226ck	130	230	64	3	660	960	1700	2200	0.29	2.3	3.5	2.3	10.5
22228c	140	250	68	3	730	1080	1400	1900	0.26	2.6	3.5	2.5	13.4
22228ck	140	250	68	3	730	1080	1400	1900	0.26	2.6	3.5	2.5	13.4
22230c	150	270	73	3	880	1300	1400	1800	0.26	2.6	3.9	2.5	16.9
22230ck	150	270	73	3	880	1300	1400	1800	0.26	2.6	3.9	2.5	16.9
22232c	160	290	80	3	965	1370	1300	1700	0.26	2.6	3.9	2.5	21.7
22232ck	160	290	80	3	965	1370	1300	1700	0.26	2.6	3.9	2.5	21.7
22234c	170	310	86	4	1170	175	1200	1600	0.27	2.5	3.9	2.5	26.2
22234ck	170	310	86	4	1170	175	1200	1600	0.27	2.5	3.9	2.5	26.2
22236c	180	320	86	4	1210	1870	1100	1500	0.26	2.6	3.7	2.5	27.5
22236ck	180	320	86	4	1210	1870	1100	1500	0.26	2.6	3.7	2.5	27.5
22238c	190	340	92	4	1200	1830	1100	1400	0.26	2.6	3.9	2.5	37.2
22238ck	190	340	92	4	1200	1830	1100	1400	0.26	2.6	3.9	2.5	37.2
22240c	200	360	98	4	1250	2020	1100	1400	0.29	2.3	3.9	2.3	44.4
22240ck	200	360	98	4	1250	2020	1100	1400	0.29	2.3	3.9	2.3	44.4
22244C	220	400	108	4	1545	2300	900	1200	0.29	2.3	3.4	2.3	61.4
22244CK	220	400	108	4	1545	2300	900	1200	0.29	2.3	3.4	2.3	61.4
22248C	240	440	120	4	1845	2763	850	1100	0.29	2.3	3.4	2.3	83.2
22248CK	240	440	120	4	1845	2763	850	1100	0.29	2.3	3.4	2.3	83.2
22252MB	260	480	130	5	2190	3300	750	1000	0.29	2.3	3.4	2.3	107
22252K.MB	260	480	130	5	2190	3300	750	1000	0.29	2.3	3.4	2.3	107
22256MB	280	500	130	5	2330	3600	700	950	0.29	2.3	3.4	2.3	113
222256K.MB	280	500	130	5	2330	3600	700	950	0.29	2.3	3.4	2.3	113
22260MB	300	540	140	5	2670	4176	670	900	0.29	2.3	3.4	2.3	142
22260K.MB	300	540	140	5	2670	4176	670	900	0.29	2.3	3.4	2.3	142
22264MB	320	580	150	5	3150	5100	630	580	0.29	2.5	3.7	2.5	180
22264K.MB	320	580	150	5	3150	5100	630	580	0.29	2.5	3.7	2.5	180

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Industry Knowledge Expansion

1. The design features of Series 222-Spherical Roller Bearings

Central to the design of Series 222 bearings is their non-separable double-row radial configuration, meticulously engineered to optimize load distribution and enhance stability under diverse operating conditions. The symmetrical inner ring raceway facilitates seamless rolling motion, reducing friction and minimizing wear while accommodating both radial and axial loads with unparalleled precision. At the heart of Series 222 bearings lie two rows of meticulously machined barrel-shaped rollers, strategically positioned to evenly distribute loads and alleviate stress concentrations. Crafted from premium-grade steel, these rollers undergo rigorous heat treatment processes to enhance strength and durability. Precision-ground to exacting tolerances, they ensure consistent performance, even under the most demanding loads and operating conditions. The robust cage design of Series 222 bearings provides added support and guidance to the rollers, optimizing their positioning and enhancing overall bearing performance. This cage, typically made of stamped steel or brass, maintains proper roller spacing while allowing for smooth operation and efficient load distribution.

3. Enhanced Versatility

What truly distinguishes Series 222 spherical roller bearings is their unmatched versatility, offering a myriad of options to address specific application requirements with precision and efficiency. While the standard open design sets the benchmark for performance, DHK recognizes the need for tailored solutions and offers customizable configurations within the Series 222 lineup. For applications where space constraints dictate a more compact solution, DHK can engineer single-row spherical roller bearings within the Series 222 range. These bearings retain the fundamental characteristics of their double-row counterparts while offering a more streamlined profile, ideal for installations where space optimization is paramount. In scenarios where accessibility and maintenance considerations are critical, DHK's split outer ring spherical roller bearings within the Series 222 portfolio provide a groundbreaking solution. Featuring a design that allows the outer ring to be split into two halves, these bearings facilitate easier installation, inspection, and servicing without compromising performance or reliability. By offering a diverse range of configurations, including single-row and split outer ring designs alongside the standard double-row configuration, DHK ensures that Series 222 spherical roller bearings can be tailored to meet the unique needs of virtually any industry or application.

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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?

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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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Series 222-Spherical Roller Bearings

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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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