Angular Contact Bearing, Ultra 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	7803-DB	17	26	5	3.58	3	33600	52500	0.3	0.15	15	19	24	0.3	0.016
	7804-DB	20	32	7	5.85	5	28000	44100	0.3	0.15	19.2	22	30	0.3	0.036
	7805-DB	25	37	7	6.34	6	23800	37100	0.3	0.15	21.6	27	35	0.3	0.044
	7806-DB	30	42	7	6.66	7	19600	31500	0.3	0.15	23.8	32	40	0.3	0.05
	7807-DB	35	47	7	6.99	8	18200	28000	0.3	0.15	26.2	37	45	0.3	0.058
	7808-DB	40	52	7	6.50	9	15400	23800	0.3	0.15	28.6	42	50	0.3	0.064
	7809-DB	45	58	7	7.48	10	14000	21000	0.3	0.15	31	47	56	0.3	0.080
	7810-DB	50	65	7	11.05	14.6	12600	19600	0.3	0.15	33.8	52	63	0.3	0.104
	7811-DB	55	72	9	15.44	20.4	11200	16800	0.3	0.15	38.6	57	70	0.3	0.162
	7812-DB	60	78	10	20.64	26.8	10500	15400	0.3	0.15	42.2	62	76	0.3	0.200
	7813-DB	65	85	10	20.64	28	9100	14000	0.6	0.3	45	68.2	81.8	0.6	0.25
	7814-DB	70	90	10	21.13	30	9100	13300	0.6	0.3	47.4	73.2	86.8	0.6	0.266
	7815-DB	75	95	10	21.61	32	8400	12600	0.6	0.3	49.8	78.2	91.8	0.6	0.284
	7816-DB	80	100	10	22.43	34	7700	11900	0.6	0.3	52	83.2	96.8	0.6	0.3
	7817-DB	85	110	13	32.99	48	7000	11200	1	0.3	58.6	89.6	105.4	1	0.524
	7818-DB	90	115	13	32.99	50.0	7000	10500	1	0.3	61	94.6	110.4	1	0.548
	7819-DB	95	120	13	33.80	51	6650	9800	1	0.3	63.2	99.6	115.4	1	0.574
	7820-DB	100	125	13	34.45	55.0	5950	9100	1	0.3	65.6	104.6	120.4	1	0.602
	7821-DB	105	130	13	35.10	57	5600	8400	1	0.3	68	109.6	125.4	1	0.628
	7822-DB	110	140	16	49.08	76.0	5250	8400	1	0.3	74.4	114.6	135.4	1	0.992

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.