Double row angular contact ball bearing:3306 2RS

Basic Parameters

• • Type code "3": Indicates that this bearing is a double-row angular contact ball bearing. This type of bearing can simultaneously withstand large radial loads and two-way axial loads and is suitable for working conditions that need to bear composite loads, such as machine tool spindles, automobile hubs and other parts.

  • Size series code "30": Among them, "3" is the diameter series code and "0" is the width series code. The diameter series represents the outer diameter size series corresponding to the same bearing inner diameter. The larger the number, the larger the outer diameter; the width series represents the width size series corresponding to the same bearing diameter series. The larger the number, the larger the width. In 3306, this size series combination of "30" determines the specific size proportion and load-bearing capacity range of this bearing in double-row angular contact ball bearings.

  • Inner diameter code "06": Indicates the inner diameter size of the bearing. For bearings with a common inner diameter d = 20 to 480 mm, the inner diameter is generally a multiple of 5. These two digits represent the quotient obtained by dividing the inner diameter size of the bearing by 5. So "06" indicates that the inner diameter of the bearing is 6×5 = 30 mm.

  
  

  Suffix "2RS" indicates that the sealing method of the bearing is double-sided rubber sealing, where "RS" represents rubber sealing. This sealing structure can effectively prevent dust, impurities, moisture, etc. from entering the bearing interior, protect the raceway and balls of the bearing, reduce wear and corrosion, and at the same time can maintain the lubricating grease inside the bearing, reduce the leakage of lubricating grease, and ensure that the bearing always maintains a good lubrication state during long-term operation, thereby improving the service life and reliability of the bearing.

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    3306 2RS

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    3306 2RS

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    3306 2RS

   

WorkingStructural Features

• Dual-row design: Adopts a dual-row angular contact ball structure. Compared to single-row bearings, it has higher load-carrying capacity and better rigidity. The arrangement of dual-row balls can distribute the load more evenly and reduce the force on a single ball, thereby improving the service life and operational stability of the bearing.
• Contact angle: The contact angle of the bearing is carefully designed and is usually between 30° and 40°. This angle enables the bearing to achieve a better balance when bearing axial and radial loads, and can effectively cope with complex load conditions to ensure that the equipment remains stable under various operating conditions.
• Sealing form: The bearing has 2RS seals on both sides, that is, two-sided contact seals made of synthetic rubber. This sealing structure can effectively prevent dust, impurities, moisture, etc. from entering the bearing interior, protect the raceway and balls of the bearing, reduce wear and corrosion, and extend the service life of the bearing. At the same time, the sealing design can also maintain the grease inside the bearing and reduce the leakage of grease to ensure that the bearing always maintains a good lubrication state during long-term operation.

Product Application

Industrial machinery

Machine tool: Commonly used in the spindle part of machine tools. It can withstand the radial cutting force and axial thrust generated during the cutting process of machine tools, ensuring the rotational accuracy and stability of the spindle and thus ensuring the precision of machined parts. For example, it is widely used in CNC lathes, milling machines and other machine tools.
Reducer: In a reducer, the 3306-2RS bearing can be used to support the gear shaft and bear the radial load and axial load generated during gear transmission, enabling the reducer to transmit power smoothly, reducing vibration and noise and improving transmission efficiency.
Printing machinery: In parts such as the roller shaft and paper feeding mechanism of a printing machine, bearings with high precision and load-bearing capacity are required to ensure the accurate conveyance of paper and the stable rotation of the roller during the printing process. The 3306-2RS bearing can meet these requirements and ensure printing quality.

Automotive industry

Wheel hub bearing: In the wheel hub parts of some light vehicles or minibuses, the 3306-2RS bearing can bear the radial load applied to the wheel hub by the road surface when the vehicle is driving and the axial load generated due to vehicle steering and braking. At the same time, it ensures the free rotation of the wheel hub, improving the driving safety and comfort of the vehicle.
Transmission: Used for shaft support in the transmission. It can bear the complex loads generated during shifting and power transmission of the transmission, including the radial force during gear meshing and the axial force caused by shifting operations, ensuring the normal operation of the transmission and reducing wear and failure.

Construction machinery

Excavator: In parts such as the slewing platform and bucket cylinder connection part of an excavator, the 3306-2RS bearing needs to bear large radial and axial loads to adapt to the complex stress conditions of the excavator during excavation and slewing operations, ensuring the flexible movement of each part and the stability of the whole machine.
Crane: The 3306-2RS bearing is also used in parts such as the boom telescoping mechanism and slewing mechanism of a crane. It can bear the huge load generated when the boom is telescoping and lifting heavy objects, as well as the radial and axial forces during the rotation of the slewing mechanism, ensuring the safe and reliable operation of the crane.

Motor field

Small and medium-sized motors: For some small and medium-sized motors with moderate power, the 3306-2RS bearing can be used to support the motor shaft and bear the weight of the rotor and the radial and axial forces caused by electromagnetic force during motor operation, ensuring the rotational accuracy and stability of the motor rotor, reducing vibration and noise and improving the efficiency and service life of the motor.

Other fields

Medical equipment: In some medical equipment such as the rotating parts of a CT machine and medical centrifuges, bearings with high precision, low noise and high reliability are required to ensure the normal operation of the equipment and detection accuracy. The 3306-2RS bearing has certain advantages in meeting these requirements.
Fitness equipment: For example, in parts such as the roller shaft of a treadmill and the pedal shaft of an exercise bike, the 3306-2RS bearing can bear the load applied by human movement, ensuring the smooth operation of the equipment and the comfortable experience of users.

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  printing machinery

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  treadmill

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  medical centrifuge

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