638ZZ Bearing Deep Groove Precision Instrument Bearings High Speed

Product Specification

638ZZ Deep Groove Ball Bearing: Compact, Low Noise & High-Speed

I. Product Overview​

The 638-ZZ deep groove ball bearing is a compact and practical basic component in the field of mechanical transmission. With its compact structural design and reliable performance, it plays an important role in various small mechanical equipment. It can effectively bear radial loads and also a certain amount of axial loads, performing excellently in working conditions that require equipment volume and operational stability. Its application range covers multiple fields such as micro motors, precision instruments, small household appliances, toys, and medical devices, and it is a key component to ensure the efficient operation of core parts of small equipment and the precise transmission of power.​

II. Structural Design​

1. Precise Cooperation between Balls and Raceways: The 638-ZZ deep groove ball bearing uses high-precision steel balls as rolling elements inside. After precision grinding, the steel balls have a smooth surface and high dimensional accuracy, and can roll smoothly in the deep groove raceways of the inner and outer rings. The depth and radian of the raceways are optimally designed, so that the contact area between the steel balls and the raceways is reasonable, which can not only effectively disperse the load but also reduce friction loss, ensuring that the noise and vibration of the bearing are at a low level during operation. When the equipment is subjected to radial or axial forces, the steel balls flexibly adjust their positions in the raceways and evenly transmit the force to the inner and outer rings through multi-point contact, ensuring the stable operation of the bearing as a whole.​

2. Sealing Structure Design: The "ZZ" in the model represents that the bearing adopts a double-sided metal dust cover sealing structure. The dust cover is made of high-quality thin metal sheets by stamping, and is tightly installed on both sides of the bearing after fine processing. It can effectively block foreign objects such as dust and impurities from entering the inside of the bearing, avoiding wear and pollution of the steel balls and raceways, and significantly extending the service life of the bearing. At the same time, the inside of the bearing is pre-filled with an appropriate amount of high-performance grease, which, under the protection of the dust cover, can continuously provide lubrication for the steel balls and raceways, reducing equipment maintenance costs and workload.​

III. Dimensional Specifications​

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IV. Performance Advantages​

1. Excellent Bearing Capacity: Although the 638-ZZ deep groove ball bearing is small in size, with its reasonable structure and high-quality materials, it shows reliable performance in radial load-bearing and can also bear a certain amount of axial load. For example, in micro motors, it can stably bear the radial electromagnetic force generated by motor operation and the axial force caused by the rotor weight, ensuring the stable and high-speed rotation of the rotor and guaranteeing the efficient and reliable operation of the motor.​

2. Low Friction and High-Speed Performance: Deep groove ball bearings themselves have a small friction coefficient. The 638-ZZ model further reduces the friction coefficient through high-precision processing and special heat treatment of the steel balls and raceways, so that the bearing generates less heat and has low energy consumption during operation, and can adapt to higher speed requirements. In small high-speed rotating equipment such as toy motors, the bearing can operate stably to achieve efficient power transmission, and its low friction characteristic helps reduce energy consumption.​

3. Excellent Operational Stability: The precision manufacturing process ensures the fitting accuracy of various parts of the bearing. The rolling trajectory of the steel balls in the raceways is stable, which effectively reduces vibration and noise. The sealing structure of the double-sided dust cover not only blocks the entry of foreign objects but also enhances the structural rigidity of the bearing, further improving operational stability. In the transmission components of precision instruments, its stable operational performance can ensure accurate operation of the equipment and improve work efficiency.​

V. Application Fields​

1. Micro Motor Industry: Widely used in various micro motors, such as toy motors and small fan motors. As a supporting component for motor rotors, it can ensure the stability of the rotor during high-speed rotation, reduce vibration and noise, improve the operating efficiency and reliability of the motor, and extend the service life of the motor.​

2. Precision Instrument Field: In small precision insStainlesstruments such as micro measuring instruments and transmission components of portable devices, the 638-ZZ deep groove ball bearing, with its high precision and stability, meets the strict requirements of the equipment for component precision, ensures the accurate operation of the instrument, and guarantees the accuracy of measurement or operation.​

3. Small Household Appliances Field: Widely used in the motors of small household appliances such as electric toothbrushes and mini massagers. With the advantages of low noise and long service life, it ensures that the appliances operate quietly and stably, improves user experience, and reduces the probability of maintenance.​

4. Toy and Medical Device Field: In the transmission mechanisms of toys and rotating components of some small medical devices, the bearing can adapt to the working conditions of frequent start-up and stop, and ensure the normal operation of the equipment with its reliable performance, ensuring the safety of use.