Low Noise Ball Bearing 6804ZZ 20x32x7 Bearing Deep Groove For Machinery

6804ZZ Deep Groove Ball Bearing: Compact, High-Load & Low Noise For Machinery

I. Product Overview

The 6804ZZ deep groove ball bearing, as a key model in the deep groove ball bearing series, plays a core role in numerous mechanical transmission systems with its unique design and excellent performance. Its dimensional settings of 20mm inner diameter, 32mm outer diameter, and 7mm thickness result in a compact and structure, which can perfectly fit various devices with limited space, providing solid support for the efficient and stable operation of the equipment. In industries such as industrial automation equipment, precision instruments and meters, small motor manufacturing, medical device research and development, and office equipment production, this bearing is an important basic component to ensure the precise transmission and stable operation of the core parts of the equipment.

II. Structural Design

1. Rolling Elements and Raceways: High-precision steel balls that have undergone multiple precision grinding processes are selected as rolling elements inside the bearing. Their surface roughness is extremely low, and the dimensional tolerances are strictly controlled within a very small range, ensuring a high degree of consistency. Both the inner and outer rings of the bearing are equipped with carefully designed deep groove raceways. The radian and depth of the raceways are optimized based on precise calculations to achieve a perfect fit with the steel balls. When the equipment is running, the steel balls roll in the raceways, and the contact area is evenly distributed, which can not only efficiently disperse radial loads but also have a certain axial load-carrying capacity. Through multi-point contact, the steel balls transmit force smoothly, effectively reducing local wear, thereby ensuring the stability and low-noise characteristics of the bearing operation.

2. Sealing Structure: The "ZZ" in the model clearly indicates that the bearing is equipped with a double-sided metal dust cover sealing structure. The dust covers are made of high-quality thin metal sheets through a precision stamping process, closely fitting on both sides of the bearing, like a solid protective barrier. This structure can effectively block dust, impurities, water vapor, and other foreign objects from invading the inside of the bearing, avoiding contamination and wear of the steel balls and raceways. At the same time, it can also well protect the high-performance grease pre-filled inside the bearing, preventing its loss and deterioration, greatly extending the lubrication cycle and service life of the bearing, and reducing the maintenance cost of the equipment.

III. Performance Characteristics

1. High-Speed Adaptability: The 6804ZZ deep groove ball bearing uses advanced manufacturing processes and high-quality materials, resulting in an extremely low friction coefficient. This characteristic enables it to operate stably under high-speed working conditions. In equipment such as small high-speed motors, it can easily cope with the high-speed rotation of the rotor, achieve efficient power transmission, and generate little heat during operation, significantly reducing the risk of equipment failure caused by overheating.

2. Reliable Load-Carrying Capacity: Although the bearing is small in size, through reasonable structural design and the use of high-strength materials, it has excellent radial load-carrying capacity and also has a certain degree of bidirectional axial load-carrying capacity. In small and medium-sized transmission mechanisms, it can not only stably support the rotation of the shaft, effectively cope with radial forces but also resist axial forces generated during equipment operation, ensuring the continuous and stable operation of the equipment.

3. Low Noise and Low Vibration: With precision processing technology, high-precision coordination between various parts of the bearing is achieved. The rolling trajectory of the steel balls in the raceways is stable and orderly, which greatly reduces vibration and noise. In precision instruments with strict requirements on the operating environment, such as high-precision measuring instruments, the bearing can ensure quiet operation of the equipment without interfering with measurement accuracy, providing strong guarantee for the accurate work of the equipment.

IV. Application Fields

1. Industrial Automation Equipment: Widely used in many small transmission devices of automated production lines, such as the drive shaft support parts of precision conveyors and the joints of small robotic arms. Its stable performance and high-precision operation can ensure the positioning accuracy and operation efficiency of automated equipment, effectively improving production quality.

2. Precision Instrument Industry: Commonly found in precision instruments such as microscopes, laser measuring instruments, and small sensors. With its own characteristics of high precision and low noise, it can fully meet the strict requirements of instruments for component precision, ensuring the accuracy of instrument measurement data and the stability of operation.

3. Small Motor Field: It is an ideal supporting component for the rotors of various small motors, such as small water pump motors, fan motors, and precision instrument drive motors. It can ensure the stability of the motor rotor during high-speed rotation, reduce vibration and noise, improve the operation efficiency and reliability of the motor, and extend the service life of the motor.

4. Medical Device Field: In small medical devices, such as portable blood pressure monitors and micro infusion pumps, the stable operation state and low-noise characteristics of the 6804ZZ deep groove ball bearing are crucial. It can ensure the safe and reliable use of medical devices during use, bring a good user experience to patients, and reduce the maintenance frequency of the equipment.

5. Office Equipment Scenarios: In the transmission components of printers, the rotating mechanisms of copiers and other office equipment, the compact structure and stable performance of the bearing play a key role. It can adapt to the needs of office equipment for frequent start-stop and long-term continuous work, ensure the normal operation of the equipment, and improve office efficiency.

V. Dimensions and Specification Parameters

VI. Maintenance Points

1. Lubrication Management: The bearing is pre-filled with an appropriate amount of high-performance grease at the factory, and there is no need for frequent addition in normal working environments. However, if it is in harsh working conditions such as high temperature, high humidity, and heavy dust, it is necessary to regularly check the state of the grease. Once the grease is found to be dry, discolored, or mixed with impurities, the suitable grease should be replaced in time, and attention should be paid to the appropriate filling amount to ensure a good lubrication effect.

2. Regular Inspection: Establish a sound regular inspection system, conduct visual inspections of the bearing, focusing on checking whether the dust cover is intact and whether there are signs of damage, deformation, or loosening. Use professional instruments to monitor the vibration and temperature of the bearing during operation. If the vibration increases abnormally or the temperature exceeds the normal range (usually, the normal working temperature is 10 - 20℃ higher than the ambient temperature), it is necessary to stop the machine immediately for inspection, investigate the cause of the fault, and repair or replace it in time to prevent the fault from expanding further.

3. Installation Notes: It is necessary to ensure a clean environment during installation to avoid foreign objects entering the inside of the bearing. Use appropriate installation tools and strictly operate in accordance with the correct installation method to ensure that the matching accuracy between the bearing and the shaft and bearing seat meets the requirements. Avoid impact damage to the bearing during installation to ensure that the bearing can operate normally and give full play to its performance.