Angular Contact Bearing, Thin Wall, Two-Row Combination DB Type

· Angular contact ball bearings are mainly used to withstand radial loads and can also withstand small axial loads.
· Angular contact ball bearings are widely used in precision CNC machine tools, high-speed grinding machines, engraving machines, high-speed spindles, RV reducers, and other industries.

 

Material	Bearing Precision	Contact Angle	Vibration Class
Equivalent to SUJ2	P5 Grade	25°	V1

 

Part Number		Dimensions (mm)			Rated Load (kN)		Rotational Speed Limit (rpm)		r (min)	r1 (min)	Point of Action a	Mounting Dimensions			Weight (kg)
Type	Bearing Part Number	Inner Diameter d	Outer Diameter D	Width B	Cr	Cor	Grease Lubrication	Oil Lubricated				Ds (min.)	dh (max.)	R (max.)
E-B	7900-DB	10	22	6	3.90	2.0	44100	66500	0.3	0.2	13.6	12	20	0.3	0.02
	7901-DB	12	24	6	4.06	2.2	39200	59500	0.3	0.2	14.6	14	22	0.3	0.02
	7902-DB	15	28	7	6.01	3.6	35000	52500	0.3	0.2	17	17	26	0.3	0.04
	7903-DB	17	30	7	6.34	4	31500	46900	0.3	0.2	18	19	28	0.3	0.04
	7904-DB	20	37	9	9.26	6.0	26600	39200	0.3	0.2	22.4	22	35	0.3	0.08
	7905-DB	25	42	9	10.24	7.6	22400	33600	0.3	0.2	24.8	27	40	0.3	0.08
	7906-DB	30	47	9	10.89	8.6	18200	28000	0.3	0.2	27.2	32	45	0.3	0.1
	7907-DB	35	55	10	14.95	12.4	15400	25200	0.6	0.3	31.2	38.2	51.8	0.6	0.14
	7908-DB	40	62	12	19.01	16.0	12600	21000	0.6	0.3	36	43.2	58.8	0.6	0.22
	7909-DB	45	68	12	20.15	18	11900	19600	0.6	0.3	38.6	66.6	64.8	0.6	0.252
	7910-DB	50	72	12	20.64	19.6	11200	18200	0.6	0.3	40.6	53.2	68.8	0.6	0.258
	7911-DB	55	80	13	29.58	27.4	10500	16800	1.1	0.3	44.8	59.6	75.4	1.1	0.348
	7912-DB	60	85	13	30.23	29.2	9800	15400	1.1	0.3	47	64.6	80.4	1.1	0.374
	7913-DB	65	90	13	31.69	32	9100	14000	1.1	0.3	49.4	69.6	85.4	1.1	0.4
	7914-DB	70	100	16	52.81	65.0	7700	12600	1.1	0.3	55.8	74.6	95.4	1.1	0.68
	7915-DB	75	105	16	54.93	71	7000	11900	1.1	0.3	58.2	79.6	100	1.1	0.72
	7916-DB	80	110	16	56.06	73.0	6650	11200	1.1	0.3	60.4	84.6	105	1.1	0.76
	7917-DB	85	120	18	70.85	91	6300	10500	1.1	0.6	66	91	114	1.1	1.06
	7918-DB	90	125	18	71.83	96.0	5950	9800	1.1	0.6	68.4	96	119	1.1	1.12
	7919-DB	95	130	18	75.08	104	5950	9800	1.1	0.6	70.6	101	124	1.1	1.164
	7920-DB	100	140	20	92.95	126.0	5600	9100	1.1	0.6	76.2	106	134	1.1	1.58
	7921-DB	105	145	20	92.95	131	5250	8400	1.1	0.6	78.6	111	139	1.1	1.62
	7922-DB	110	150	20	95.06	136.0	5250	8400	1.1	0.6	80.8	116	144	1.1	1.68
	7924-DB	120	165	22	118.30	173	4900	7700	1.1	0.6	88.8	126	159	1.1	2.3
	7926-DB	130	180	24	141.54	204.0	4690	7000	1.5	0.6	96.6	137	173	1.5	3.04

Dimensions in parentheses are for reference only. Please refer to the actual product dimensions.
 

· The product's precision reaches P5 grade; the precision grade directly affects its operation and service life.
· Making full use of the features of angular contact bearings means longer service life, reduced energy consumption, increased rigidity and speed, and lower maintenance costs.

When the precision of the shaft and bearing housing is poor, the bearing will be affected, and its due performance will not be exerted. For example, the poor precision of the mounting part with the bearing will cause relative inclination of the inner and outer rings. At this time, besides the bearing load, the edge load will be increased additionally, which will shorten the fatigue life of the bearing, and even more seriously, it will lead to damage such as cage breakage and sticking.

Please use the following special mounting tool for installation and removal

Bearing heater
	Proper installation of the bearing heater can guarantee a long life of the bearing. Rolling bearings are reliable mechanical components with long service life if they are installed and maintained correctly. After the induction heater is used for heating, the bearing expands outward in the cylindrical direction, which can avoid the damage during installation. Induction heater is one of the most scientific heating methods, which does not need preheating, and can be heated to 110℃ in a few seconds or minutes depending on the weight of bearings, without damaging the prior lubrication
Bearing puller
	When the installation state of the bearing is in the following situations, the special puller can be used for disassembly. (a) Shaft shape: cylindrical shaft, Inner diameter shape of bearing inner ring: cylindrical hole. (b) Shaft shape: cylindrical shaft, inner diameter shape of bearing inner ring with tight bushing: tapered hole. (c) Shaft shape: tapered shaft, Inner diameter shape of bearing inner ring: tapered hole. In either state, the lock nut of the shaft (or the lock nut of the tight bushing) must be released during disassembly, and the lock nut must be placed in a loose state.