Spherical roller bearings are designed with double-row raceway inner ring, spherical raceway outer ring and the convex symmetrical rollers. With the same center as the bearings, the spherically formed outer ring raceway can make self alignment, which can adapt the deflection between axis and housing bore. 

 

This kind of bearings can take great radial load, suitable for heavy machines used in paper-making, mining, vibration sieve, rolling mill and so on.  

 

Spherical roller bearing features: 

 

1) Series: 21300 series, 22200 series, 22300 series, 23100 series, 23200series,24000 series, 24100 series and 23900 series

2) Material of rings and rollers: chrome steel; GCr15 and GCr15SiMn

3) Material of cages: brass, steel and nylon

4) Precision: P0, P6

 

5) Suffixes:

a) CA: Integral brass cage, double row symmetrical rollers, inner ring ride

b) MA: Integral brass cage, double row symmetrical rollers, outer ring ride

c) MB: Two piece brass cage, double row asymmetrical rollers, inner ring ride

d) CC: Two piece steel cage, double row symmetrical rollers, inner ring ride

e) CTN1: double row symmetrical rollers, nylon cage

f) K: Tapered bore bearing, the taper is 1:12

g) K30: Tapered bore bearing, the taper is 1:30

h) W33: With lubrication groove in outer ring, with three oil holes

i) C2/C3/C4: Internal clearance series: C2, C0, C3, and C4

Boundary dimensions(mm)				Basic load ratings(kN)		Limiting speeds(rpm)		Mass(Kg)	Designation
d	D	B	rs min	Cr	Cor	Grease	Oil	(Approx.)	CC /CA /E /MB
40	90	23	1.5	88	90	3,200	4,900	0.705	21308
40	90	23	1.5	88	90	3,200	4,900	0.694	21308K
40	90	23	1.5	88	90	3,200	4,900	0.694	21308KW33C3
40	90	23	1.5	88	90	3,200	4,900	0.705	21308W33C3
45	100	25	1.5	102	106	2,900	4,400	0.927	21309
45	100	25	1.5	102	106	2,900	4,400	0.912	21309K
45	100	25	1.5	102	106	2,900	4,400	0.912	21309KW33C3
45	100	25	1.5	102	106	2,900	4,400	0.927	21309W33C3
50	110	27	2	118	127	2,600	4,000	1.21	21310
50	110	27	2	118	127	2,600	4,000	1.19	21310K
50	110	27	2	118	127	2,600	4,000	1.19	21310KW33C3
50	110	27	2	118	127	2,600	4,000	1.21	21310W33C3
55	120	29	2	145	163	2,400	3,700	1.71	21311
55	120	29	2	145	163	2,400	3,700	1.69	21311K
55	120	29	2	145	163	2,400	3,700	1.69	21311KW33C3
55	120	29	2	145	163	2,400	3,700	1.71	21311W33C3
60	130	31	2.1	167	191	2,200	3,400	2.1	21312
60	130	31	2.1	167	191	2,200	3,400	2.07	21312K
60	130	31	2.1	167	191	2,200	3,400	2.07	21312KW33C3
60	130	31	2.1	167	191	2,200	3,400	2.1	21312W33C3
65	140	33	2.1	194	228	2,000	3,100	2.55	21313
65	140	33	2.1	194	228	2,000	3,100	2.51	21313K
65	140	33	2.1	194	228	2,000	3,100	2.51	21313KW33C3
65	140	33	2.1	194	228	2,000	3,100	2.55	21313W33C3
70	150	35	2.1	220	262	1,900	2,900	3.18	21314
70	150	35	2.1	220	262	1,900	2,900	3.14	21314K
70	150	35	2.1	220	262	1,900	2,900	3.14	21314KW33C3
70	150	35	2.1	220	262	1,900	2,900	3.18	21314W33C3
75	160	37	2.1	239	287	1,800	2,700	3.81	21315
75	160	37	2.1	239	287	1,800	2,700	3.76	21315K
75	160	37	2.1	239	287	1,800	2,700	3.76	21315KW33C3
75	160	37	2.1	239	287	1,800	2,700	3.81	21315W33C3
80	170	39	2.1	260	315	1,700	2,500	4.53	21316
80	170	39	2.1	260	315	1,700	2,500	4.47	21316K
80	170	39	2.1	260	315	1,700	2,500	4.47	21316KW33C3
80	170	39	2.1	260	315	1,700	2,500	4.53	21316W33C3
85	180	41	3	289	355	1,600	2,400	5.35	21317
85	180	41	3	289	355	1,600	2,400	5.28	21317K
85	180	41	3	289	355	1,600	2,400	5.28	21317KW33C3
85	180	41	3	289	355	1,600	2,400	5.35	21317W33C3
90	190	43	3	320	400	1,500	2,300	6.3	21318
90	190	43	3	320	400	1,500	2,300	6.21	21318K
90	190	43	3	320	400	1,500	2,300	6.21	21318KW33C3
90	190	43	3	320	400	1,500	2,300	6.3	21318W33C3
95	200	45	3	335	420	1,400	2,100	7.1	21319
95	200	45	3	335	420	1,400	2,100	7	21319K
95	200	45	3	335	420	1,400	2,100	7	21319KW33C3
95	200	45	3	335	420	1,400	2,100	7.1	21319W33C3
100	215	47	3	370	465	1,300	2,000	8.89	21320
100	215	47	3	370	465	1,300	2,000	8.78	21320K
100	215	47	3	370	465	1,300	2,000	8.78	21320KW33C3
100	215	47	3	370	465	1,300	2,000	8.89	21320W33C3
110	240	50	3	495	615	1,200	1,800	11.2	21322
110	240	50	3	495	615	1,200	1,800	11.1	21322K
110	240	50	3	495	615	1,200	1,800	11.1	21322KW33C3
110	240	50	3	495	615	1,200	1,800	11.2	21322W33C3