Angular contact ball bearing

Deep groove ball bearing

2021年9月18日

Ball Screw Support bearings are the optimal choice for high performance ball screw and actuator applications. They are designed to provide a combination of high rigidity, low drag torque, exceptional control of axial runout, higher speeds and longer life. Applications include machine tools, precision measuring equipment and robot technologies.

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Features:
1. Contact angle ― Various products with contact angles of 15 degrees, 25 degrees, 30 degrees, and 40 degrees are available
2. Cage ― Various cages made of polyamide, steel and brass are available

Single row angular contact ball bearings
This kind of bearing has a contact angle, so it is suitable for bearing axial load in one direction, or composite load. Structurally, the axial separation occurs after bearing the radial load. Therefore, two bearings should be used oppositely, or two or more bearings should be used in pairs. Single row angular contact ball bearings can use preloading method to increase rigidity, so they are suitable for machine tool spindles with high rotation accuracy. Generally, the angular contact ball bearing cages with contact angles of 30° (code A) and 40° (code B) are in accordance with Table 1. However, synthetic resin cages or polyamide molded cages are also used according to different conditions. The basic load rating described in the dimension table is based on the cage classification in Table 1.

Table 1 Standard cages of angular contact ball bearings
Bearing series	Stamping cage	Copper alloy car cage
79A5,C	-	7900～7940
70A	7000～7018	7019～7040
70C	-	7000～7022
72A,B	7200～7222	7224～7240
72C	-	7200～7240
73A,B	7300～7320	7321～7340

Paired double angular contact ball bearings
The structure and characteristics of paired double bearings are shown in Table 2

Table 2 Structural features of pairs of double bearings
Figure	Arrangement	Features
	Back to back in pairs DB (example)7208ADB	It can bear radial load and axial load in two directions. The distance ao from the point of action is large, so it is suitable for applications with large moment loads.
	Face-to-face double DF (example)7208 B DF	It can bear radial load and axial load in two directions. Compared with the back-to-back double connection, the distance of the action point is small, so the moment load capacity is poor
	Tandem configuration DT (example)7208A DT	It can bear radial load and axial load in one direction. Two bearings are used to bear the axial load, so it is used for occasions with heavy load in one direction.

Double row angular contact ball bearings
The single row angular contact ball bearing is back-to-back doubled, and the inner ring and the outer ring are each integrated into a structure. It can bear the axial load in two directions and has the moment load capacity. Can be used as a fixed end bearing. Use stamping cages.

4-point contact ball bearing
The inner ring is divided into two, and one bearing can bear the axial load in two directions. The contact angle is 35° and the axial load capacity is large, which is suitable for bearing pure axial load or synthetic load with large axial load. Use copper alloy car cage.

Product parameter list

	Boundary dimensions	Basic load ratings	Limiting speeds	(Refer.) Mass (kg)
	(mm)	(kN)	(r/min)	(Refer.) Mass (kg)
AC/AM	d	D	B	Cr	C0r	Grease	Oil
7200	10	30	9	4.65	2.2	29000	37000	0.031
7201	12	32	10	7.45	3.65	27000	34000	0.038
7202	15	35	11	8.1	4.25	24000	29000	0.048
7203	17	40	12	10.2	5.5	21000	26000	0.07
7204	20	47	14	14.5	8.4	17000	22000	0.112
7205	25	52	15	15.3	9.5	15000	19000	0.135
7206	30	62	16	21.3	13.7	13000	16000	0.208
7207	35	72	17	28.1	18.6	11000	14000	0.295
7208	40	80	18	33.6	23.3	10000	12000	0.382
7209	45	85	19	37.7	26.6	9400	12000	0.43
7210	50	90	20	39.4	41.3	8500	11000	0.485
7211	55	100	21	48.7	37.1	7600	9500	0.635
7212	60	110	22	58.9	45.7	6900	8600	0.82
7213	65	120	23	67.3	54.2	6400	8000	1.02
7214	70	125	24	69.8	55.6	6100	7600	1.12
7215	75	130	25	79.2	65.2	5800	7200	1.23
7216	80	140	26	85.3	71.5	5400	6700	1.5
7217	85	150	28	107	90.6	7000	9200	1.87
7218	90	160	30	123	105	6500	8600	2.3
7219	95	170	32	122	103	4400	5500	2.78
7220	100	180	34	137	117	4100	5200	3.32
7221	105	190	36	149	132	3900	4900	3.95
7222	110	200	38	162	148	3700	4600	4.65
7224	120	215	40	174	166	3400	4300	5.49
7226	130	230	40	196	198	3200	4000	6.21
7228	140	250	42	218	234	2900	3600	7.76
7230	150	270	45	248	280	2700	3300	9.75
7300	10	35	11	8.5	3.75	27000	33000	0.054
7301	12	37	12	10.2	4.6	24000	31000	0.065
7302	15	42	13	12.5	6.45	20000	25000	0.088
7303	17	47	14	14.9	7.9	18000	23000	0.12
7304	20	52	15	18.5	9.95	23000	31000	0.15
7305	25	62	17	24.8	14.4	14000	17000	0.243
7306	30	72	19	30.1	18.9	12000	14000	0.362
7307	35	80	21	35.4	22	10000	13000	0.475
7308	40	90	23	43.2	27.4	9200	12000	0.657
7309	45	100	25	55.1	37.1	8200	10000	0.875
7310	50	110	27	70.1	48.1	7300	9100	1.14
7311	55	120	29	80.9	56.5	6700	8400	1.45
7312	60	130	31	92.5	65.6	6200	7700	1.81
7313	65	140	33	105	75.3	5800	7200	2.22
7314	70	150	35	118	85.8	5400	6700	2.7
7315	75	160	37	128	97	5000	6300	3.15
7316	80	170	39	139	109	4700	5900	3.85
7317	85	180	41	150	122	4400	5500	4.53
7318	90	190	43	161	135	4200	5200	5.3
7319	95	200	45	172	149	4000	4900	6.12
7320	100	215	47	184	161	3600	4600	7.53
7321	105	225	49	208	193	3500	4400	8.62
7322	110	240	50	232	226	3200	4000	10.1
7324	120	260	55	246	252	3000	3700	12.6
7326	130	280	58	301	329	2700	3400	15.4
7328	140	300	62	329	374	2500	3200	18.8
7330	150	320	65	348	414	2300	2900	22.4
7000	10	26	8	5	2.35	34000	42000	0.021
7001	12	28	8	5.4	2.75	29000	37000	0.024
7002	15	32	9	6.1	3.45	26000	32000	0.035
7003	17	35	10	6.75	4.15	23000	28000	0.045
7004	20	42	12	10.3	6.1	19000	24000	0.079
7005	25	47	12	11.3	7.4	17000	21000	0.091
7006	30	55	13	14.5	10.1	14000	18000	0.133
7007	35	62	14	17.5	12.6	12000	15000	0.17
7008	40	68	15	18.7	14.6	11000	14000	0.21
7009	45	75	16	22.2	17.7	100000	12000	0.26
7010	50	80	16	23.6	20.1	9200	11000	0.29
7011	55	90	18	31.1	26.3	8300	10000	0.42
7012	60	95	18	31.9	28.1	7700	9700	0.45
7013	65	100	18	33.7	31.4	7200	9000	0.47
7014	70	110	20	42.7	39.4	6600	8300	0.66
7015	75	115	20	43.6	41.7	6300	7800	0.69
7016	80	125	22	53.4	50.6	5800	7200	0.93
7017	85	130	22	54.6	53.7	5500	6800	0.97
7018	90	140	24	65.2	63.3	5100	6400	1.26
7019	95	145	24	66.6	67.1	4800	6000	1.32
7020	100	150	24	68.4	70.6	4700	5900	1.37
7021	105	160	26	79.8	81.9	4400	5500	1.73
7022	110	170	28	91.9	92.8	4200	5200	2.14
7024	120	180	28	96.6	103	3900	4900	2.27
7026	130	200	33	117	125	3500	4400	3.43
7028	140	210	33	120	133	3300	4100	3.64
7030	150	225	35	137	154	3000	3800	4.43