Angular contact ball bearing：7000B

Basic Parameters

In the code "7000B", the "7" at the beginning indicates an angular contact ball bearing. This is the code for the bearing type. Angular contact ball bearings can bear radial and axial loads simultaneously. The contact angle is generally 15° - 40°. The part "000" represents the size series of the bearing. It is actually composed of a width series (here it is 0) and a diameter series (also 0 here). The size series is used to distinguish bearings with the same inner diameter but different outer diameters and widths. Different size series are suitable for different application scenarios such as installation spaces and load requirements. The final "B" is the internal structure code. In angular contact ball bearings, "B" indicates a contact angle of 40°. If it is "C", the contact angle is 15°; "AC" has a contact angle of 25°. These different contact angles make the bearing different in the ability to bear axial and radial loads. The larger the contact angle, the relatively stronger the axial bearing capacity. For example, on the main shaft of a precision machine tool, angular contact ball bearings with appropriate contact angles may be selected according to specific axial and radial load requirements. Bearings like 7000B with a contact angle of 40° may be used in cases where the axial load is relatively large.

Performance Advantages

High-precision operation: The manufacturing precision of bearing 7000B is very high and can meet the needs of various precision equipment. For example, in semiconductor manufacturing equipment, the precision requirements for chip processing are extremely high. Bearing 7000B can provide precise rotational movement to ensure that each component of the processing equipment works in precise coordination according to the design requirements, thereby improving the manufacturing quality of chips.
Good high-speed performance: Due to its low friction and high-precision design, bearing 7000B can adapt to high-speed operating conditions. In high-speed motors, it can easily reach tens of thousands of revolutions per minute, and still maintain stable performance under high-speed rotation, reducing vibration and noise. This is a very crucial performance advantage for some equipment with high speed requirements, such as the motors of drones and high-speed centrifuges.
Strong load-bearing capacity: Whether it is axial or radial load, bearing 7000B has excellent load-bearing capacity. In the joint parts of industrial robots, when robots perform various complex actions, they will generate loads in different directions. Bearing 7000B can effectively bear these loads, ensuring the flexible movement and precise control of robot joints, thereby improving the working efficiency and stability of robots.

Product Application

1. Machine tool industry

   
   Spindle support: In the spindle system of precision machine tools, the 7000B bearing plays a key role. For example, at both ends of the spindle of a CNC lathe, when the lathe is machining a workpiece, the cutting tool will generate radial cutting force on the workpiece. At the same time, due to the feed movement of the cutting tool, axial cutting force will also be generated. The angular contact structure of the 7000B bearing, with a contact angle of 40°, can well withstand these two forces. It can ensure the stability of the spindle when rotating at high speed (the rotational speed may be as high as several thousand revolutions per minute), thereby ensuring machining accuracy and enabling the machined parts to reach a relatively high standard in terms of dimensional accuracy and surface finish.
   Grinding machine spindle: In a surface grinding machine, the rotational accuracy of the grinding head spindle is crucial for the flatness and surface quality of the ground workpiece. The 7000B bearing is used for supporting the grinding machine spindle and can withstand the radial force generated by the high-speed rotation of the grinding wheel and the axial force generated due to the characteristics of the grinding process. Its good rotational accuracy can ensure that the grinding wheel contacts the workpiece surface evenly during the grinding process, thereby improving grinding quality.
   

   Automobile industry

   
   Transmission: Inside the automobile transmission, there are many shafts that need bearings for support. The 7000B bearing can be used to support some transmission shafts. When a car shifts gears, axial force will be generated. The axial load-carrying capacity of the 7000B bearing can effectively prevent axial movement of the shaft. At the same time, it can also withstand a certain amount of radial force, such as the radial force generated during the gear transmission process inside the transmission. This can ensure the correct meshing of the gears inside the transmission, reduce gear wear, and improve the service life of the transmission and the smoothness of shifting.
   Automobile air conditioning compressor: The spindle of an automobile air conditioning compressor needs bearings to support its rotation. The 7000B bearing can adapt to the radial and axial loads generated when the compressor is working. During the operation of the compressor, factors such as the reciprocating movement of the piston will generate complex forces. The 7000B bearing can ensure the stable rotation of the spindle, enabling the compressor to compress the refrigerant efficiently and thus realizing the cooling function of the air conditioning.
   

   Motor industry

   
   Small high-speed motors: In some small high-speed motors (such as electric tool motors, small fan motors, etc.), the 7000B bearing can be used to support the motor shaft. When the motor rotates at high speed, radial centrifugal force will be generated. The radial load-carrying capacity of the 7000B bearing can handle this force. At the same time, since the motor may also be subjected to a certain amount of axial force during operation (such as axial impact generated at the moment of motor start and stop), the axial load-carrying capacity of the 7000B bearing can also play a role. Its compact size (determined by the size series in the model) can also adapt to the relatively narrow installation space inside small motors.
   

   Aerospace field (some small equipment)

   
   Aviation electric equipment: In some small electric equipment on airplanes (such as small ventilation equipment, driving motors for aviation instruments, etc.), the 7000B bearing can be used as a supporting component for shafts. These devices require bearings to have high reliability and precision. The 7000B bearing can withstand radial and axial loads during the operation of the equipment, and in a high-speed rotation and complex flight environment (such as temperature changes, vibrations, etc.), it can still ensure the stable operation of the equipment and provide guarantee for the normal operation of aviation equipment.
2. • 

     Grinding machine spindle

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     automobile air conditioning compressor

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     Electric tool motor

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     Aviation electrical equipment

    

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