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Double Row Angular Contact Bearing With Two Inner Rings

The double row angular contact bearing with two inner rings generally adopts high-quality bearing steel, such as GCr15, etc., and is manufactured through multiple precision processing procedures, including forging, heat treatment, grinding, and so on. The advanced manufacturing process ensures the dimensional accuracy and surface quality of the bearing, enabling it to operate stably under high-speed and high-precision working conditions.

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	Type	Main dimensions			Rated load		Rated speed
					Dynamics	Static	Speed limit
Mail		d[mm]	D[mm]	B[mm]	C[kN]	C₀[kN]	[r/min]
	3314 DMA	70	150	31	163.4	158.1	-
	3313 DMA	65	140	29	144.4	137.5	-
	3312 DMA	60	130	27	119.9	109.0	-
	3311 DMA	55	120	24	111.0	100.0	-
	3310 DMA	50	110	22	93.6	85.0	-
	3309 DMA	45	100	19	79.3	69.5	-
	3308 DMA	40	90	18	68.9	64.0	-
	3307 DMA	35	80	17	50.1	41.1	-
	3306 DMA	30	72	15	39.3	31.6	-
	3305 DMA	25	62	12	29.8	23.1	-
	3304 DMA	20	32	11	24.3	17.5	-

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Dentail

Structural Features: This type of bearing features two inner rings. Two rows of steel balls are arranged at a certain angle between the two inner rings and the same outer ring. Generally, the contact angle ranges from 15° to 40°, with common values being 25° and 30°. The unique design of the two inner rings enables the bearing to withstand axial loads in both directions and relatively large radial loads, while maintaining high rigidity and precision.
Materials and Manufacturing Processes: High-quality bearing steel, such as GCr15, is typically used. It is manufactured through multiple precision processing procedures, including forging, heat treatment, and grinding. Advanced manufacturing techniques ensure the dimensional accuracy and surface quality of the bearing, allowing it to operate stably under high-speed and high-precision working conditions.

Application

The bearings can be used in the following industries

Machine Tool Industry: It is often used in machine tool spindles. It can bear the radial and axial forces generated during the cutting process of the spindle, ensuring the rotational accuracy and stability of the spindle, thus improving the accuracy and surface quality of the machined parts.
Industrial Robots: At the joints of industrial robots, the double row angular contact bearing with two inner rings can withstand complex loads, including radial forces, axial forces, and overturning moments. It provides reliable support for the precise movement of the robot, ensuring the accuracy and repeatability of the robot's actions.
Aerospace: It is applied in some key parts of aircraft engines, such as the supporting structures of the compressor rotor and turbine rotor. It can work reliably under high-temperature, high-speed, and high-load conditions, ensuring the performance and reliability of the engine.
Precision Instruments: In precision measuring instruments such as coordinate measuring machines and optical projectors, high-precision bearings are required to ensure measurement accuracy. The double row angular contact bearing with two inner rings can provide stable support, reduce measurement errors, and improve the measurement accuracy and reliability of the instruments.