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Deep Groove Double Row Miniature ball bearing Electric Motor

. Double row bearing is designed since it's better than tandem 2pcs of single row bearing.

.Size: Inner Bore Diameter 4mm min., both with metric and Inch sizes .

.Series NOs.:  50/4-2Z , 50/5NPPU,50/8-2RS , 4201-LLU , 3202-DDU , 5203-2RSR

.Low running noise,high precision class 

.Reliable long running life ,

.Material besides chrome steel GCr15/SAE52100/DIN100Cr6, anti-corrosion stainless material SS440/SS304/SS316/Ceramic ZrO2,Si3N4/Plastic Nylon PA,POM,PEEK are available


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  • 50/4-2Z , 50/5NPPU,50/8-2RS , 4201-LLU , 3202-DDU , 5203-2RSR

  • Neutral, AND brand or any other brands authorized .


The Deep Groove Double Row Miniature Ball Bearing for Electric Motors is a precision-engineered component designed to excel in demanding applications. This compact ball bearing is meticulously crafted to ensure optimal performance within electric motor systems. With a focus on durability, precision, and efficiency, this bearing offers the reliability necessary for smooth motor operation.


This Deep Groove Double Row Miniature Ball Bearing finds its niche within electric motors of various types and sizes. Whether it's used in industrial machinery, household appliances, automotive applications, or robotics, this bearing plays a pivotal role in facilitating rotational movement and minimizing friction. Its compact design makes it particularly suitable for space-constrained environments where high-performance bearings are essential.


  1. Enhanced Performance: The design of this bearing minimizes internal friction and noise, leading to improved motor efficiency and reduced energy consumption.

  2. Durability: Built with high-quality materials and precision manufacturing, this bearing is engineered to withstand heavy loads and continuous operation, ensuring a longer service life.

  3. Precision Engineering: Each bearing is manufactured with utmost precision, resulting in consistent dimensions and smooth operation, reducing wear and tear.

  4. Double Row Configuration: The double row arrangement of the ball bearings increases radial load capacity and provides added stability, making it ideal for electric motor applications.

  5. Low Friction: The deep groove design coupled with advanced lubrication technology reduces friction and heat generation, contributing to improved overall performance.

  6. Versatility: From industrial machinery to household appliances, this bearing caters to a wide range of applications, showcasing its adaptability and reliability.

  7. Maintenance Efficiency: With its robust design, this bearing requires minimal maintenance, saving time and resources in the long run.

.Double row raceway which are better uniform and accurate are in one ring , better than tandem 2pcs of single row bearing .

.Well sealing,prevent water vapour, corrosive gases intrude into the bearing and prevent the grease leak out , means maintenance free during its life time, our bearings run with low noise , high precision , high speed because well lubricated by pregreased.

.Support radial load and fairly degree of axial load

.According to the temperature, humidity , cleanliness which the equipments served by the motor will face to , RPM speed , force bring to the bearing , bearing components material,tolerance grade , heat treatment method,internal play,grease,parameters of raceway…will be considered professionally and comprehensively.

.For example , normally chrome steel GCr15/SAE52100/DIN100Cr6 is used for rings , NBR,HNBR/Viton FPM/ACM for seals , steel ribbon/Nylon PA/PTFE/PEEK/Brass for the cage, chrome steel/stainless steel/Ceramic ZrO2 Si3N4 for the balls . Sometimes hybrid is designed if necessary .

.Internal play can be C2,C0,C3…..or special data according to engineering.

.Our bearing normally operating temperature range -30°C to +110°C . With different material/heat treatment/grease…..will be wider range , consult us for more detailed information if you need.

.For special requires , extreme high/low temperature , insulation , anti-corrsion,RPM…… consult to us.

.Each piece product from us is customized based on customer’s  request to the bearing, our action guiding goal is engineering and supply them with top quality&best price.

.We are partnership supplier to ODM/OEM/wholesaler , we are unsung heros, supporting machines running in every corner of the world.




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