OEM/ODM Series 232-Spherical Roller Bearings Company, Factory - Ningbo DHK Precision Bearing Co., Ltd.

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Series 232-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]
23218c	90	160	52	2	340	485	1500	2000	0.34	2	3	2	4.6
23218ck	90	160	52	2	340	485	1500	2000	0.34	2	3	2	4.6
23220ck	100	180	60.3	2.1	495	720	1700	2200	0.33	2	3	2	7.34
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
23224c	120	215	76	2.1	730	1120	1300	1700	0.35	1.9	2.9	1.8	13.1
23224ck	120	215	76	2.1	730	1120	1300	1700	0.35	1.9	2.9	1.8	13.1
23226c	130	230	80	3	830	1270	1300	1700	0.33	2	3	2	15.8
23226ck	130	230	80	3	830	1270	1300	1700	0.33	2	3	2	15.8
23228c	140	250	88	3	915	1370	1370	1700	0.33	2	3	2	20.8
23228ck	140	250	88	3	915	1370	1370	1700	0.33	2	3	2	20.8
23230c	150	270	96	3	1030	1610	1000	1300	0.38	1.8	2.7	1.7	24.5
23230ck	150	270	96	3	1030	1610	1000	1300	0.38	1.8	2.7	1.7	24.5
23232c	160	290	104	3	1180	1830	1200	1600	0.38	1.8	2.7	1.7	31.7
23232ck	160	290	104	3	1180	1830	1200	1600	0.38	1.8	2.7	1.7	31.7
23234c	170	310	110	4	1370	2120	900	1200	0.35	1.9	2.9	1.8	35.7
23234ck	170	310	110	4	1370	2120	900	1200	0.35	1.9	2.9	1.8	35.7
23236c	180	320	112	4	1420	2330	1100	1500	0.36	1.9	2.8	1.8	40.8
23236ck	180	320	112	4	1420	2330	1100	1500	0.36	1.9	2.8	1.8	40.8
23238c	190	340	120	4	1750	2880	850	1100	0.35	1.9	2.9	1.8	52.4
23238ck	190	400	120	4	1750	2880	850	1100	0.35	1.9	2.9	1.8	52.4
23240c	200	360	128	4	1620	2590	750	1000	0.35	1.9	2.9	1.8	58.4
2324Ock	200	360	128	4	1620	2590	750	1000	0.35	1.9	2.9	1.8	58.4
23244C	220	400	144	4	2065	3380	670	900	0.35	1.9	2.9	1.8	79.5
23244CK	220	400	144	4	2065	3380	670	900	0.35	1.9	2.9	1.8	79.5
23248C	240	440	160	4	2530	4600	630	850	0.35	1.9	2.9	1.8	109
23248CK	240	440	160	4	2530	4600	630	850	0.35	1.9	2.9	1.8	109
23256MB	280	500	176	5	2806	4645	480	630	0.35	1.9	2.9	1.8	153
23256K.MB	280	500	176	5	2806	4645	480	630	0.35	1.9	2.9	1.8	153
23264MB	320	580	208	5	4130	7026	430	560	0.35	1.9	2.9	1.8	247
23264K.MB	320	580	208	5	4130	7026	430	560	0.35	1.9	2.9	1.8	247
23272MB	360	650	232	6	4880	8490	430	560	0.35	1.9	2.9	1.8	344
23272K.MB	360	650	232	6	4880	8490	430	560	0.35	1.9	2.9	1.8	344
23276MB	380	680	240	6	5050	9660	400	530	0.35	1.9	2.9	1.8	375
23276K.MB	380	680	240	6	5050	9660	400	530	0.35	1.9	2.9	1.8	375
23280MB	400	720	256	6	5950	10807	380	500	0.35	1.9	2.9	1.8	450
23280K.MB	400	720	256	6	5950	10807	380	500	0.35	1.9	2.9	1.8	450
23284MB	420	760	272	7.5	6575	11717	360	480	0.35	1.9	2.9	1.8	540
23284K.MB	420	760	272	7.5	6575	11717	360	480	0.35	1.9	2.9	1.8	540
23288MB	440	790	280	7.5	7100	13400	360	480	0.35	1.9	2.9	1.8	595
23288K.MB	440	790	280	7.5	7100	13400	360	480	0.35	1.9	2.9	1.8	595
23292MB	460	830	296	7.5	7560	13970	340	450	0.35	1.9	2.9	1.9	695
23292K.MB	460	830	296	7.5	7560	13970	340	450	0.35	1.9	2.9	1.9	695
23296MB	480	870	310	7.5	8800	17000	340	430	0.37	1.8	2.7	1.8	835
23296K.MB	480	870	310	7.5	8800	17000	340	430	0.37	1.8	2.7	1.8	835
232/500MB	500	920	336	7.5	9650	18300	320	400	0.38	1.8	2.7	1.7	1010
232/500K.MB	500	920	336	7.5	9650	18300	320	400	0.38	1.8	2.7	1.7	1010

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Industry Knowledge Expansion

1.Dynamic and static load capacity

Dynamic load capacity is a fundamental measure of a bearing's ability to withstand varying loads while in motion. For Series 232-Spherical Roller Bearings, with a dynamic load rating of 340, this attribute signifies their exceptional resilience in dynamic operational environments. When machinery is in use, it encounters fluctuating loads due to factors such as acceleration, deceleration, and changes in direction. The design of Series 232 bearings, with their symmetrical rollers and raceways, enables them to distribute these loads evenly, reducing stress concentrations and minimizing the risk of premature wear or failure. This inherent ability to handle dynamic loads with ease enhances the operational efficiency and longevity of machinery, making Series 232-Spherical Roller Bearings a preferred choice across a spectrum of industrial applications. While dynamic load capacity pertains to the bearing's performance under motion, static load capacity is equally critical, especially during stationary periods or when subjected to sustained loads. Series 232-Spherical Roller Bearings excel in this aspect, boasting a static load capacity of 485. This parameter indicates the maximum load that the bearing can support without experiencing permanent deformation or damage while stationary. By providing a substantial margin of safety beyond typical operational loads, Series 232 bearings ensure stability and reliability, even in situations where machinery is subjected to prolonged periods of inactivity or when supporting heavy components. This resilience not only enhances the overall robustness of industrial systems but also instills confidence in operators regarding the dependability of their equipment, ultimately contributing to a safer and more efficient work environment.

2.Lightweight Design: Balancing Durability with Efficiency

In industrial settings, the pursuit of efficiency extends beyond mere performance metrics to encompass factors such as energy consumption, ease of handling, and overall operational agility. Series 232-Spherical Roller Bearings exemplify this ethos through their ingeniously crafted lightweight design, weighing a mere 4.6 kilograms.

a)Enhanced Maneuverability and Installation Ease: The lightweight construction of Series 232 bearings translates into tangible benefits throughout their lifecycle. During installation procedures, the reduced mass simplifies handling and maneuverability, minimizing the physical strain on workers and expediting assembly processes. This ease of installation not only reduces labor costs but also enhances operational efficiency by streamlining maintenance and replacement procedures, thereby minimizing downtime and maximizing productivity.

b)Reduced Inertia for Improved Performance: In dynamic operational scenarios, the impact of bearing weight extends beyond installation considerations to influence the overall performance of machinery. The lightweight design of Series 232 bearings contributes to lower rotational inertia, enabling machinery to achieve faster acceleration and deceleration rates. This enhanced responsiveness enhances operational agility, allowing for more precise control over equipment motion and facilitating swift adjustments to varying production requirements.

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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?

How can the misalignment of angular contact ball bearings affect their operational efficiency?

How can improper installation affect the performance of paired single row tapered roller bearings?

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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 232-Spherical Roller Bearings

Ningbo DHK Precision Bearing Co., Ltd.

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Click to view our factory

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Latest News

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?

How can the misalignment of angular contact ball bearings affect their operational efficiency?

How can improper installation affect the performance of paired single row tapered roller bearings?

Industry Knowledge Expansion

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