Low Friction 61905 Deep Groove Ball Bearing 25x42x9 Width For Precision Machinery

I. Product Structural Design

• Rolling Elements and Raceways: High-precision ground steel balls are used as rolling elements, with extremely low surface roughness and minimal roundness error, ensuring smooth rolling within the raceways. The inner and outer ring raceways are designed in a deep groove shape, and the raceway curvature is precisely matched with the size of the steel balls. This enables uniform contact between the steel balls and the raceways, effectively dispersing load stress and enhancing load-carrying capacity and service life.
• Cage: Mostly made of high-quality steel plates through stamping, it has a lightweight structure and good toughness. It can accurately guide the movement trajectory of the steel balls, avoiding collision and friction between them. During high-speed operation, it remains stable, ensuring low noise and high stability of the bearing.

II. Key Product Parameters

III. Material Selection

• Bearing Steel: The inner and outer rings and steel balls are made of high-quality bearing steel. After strict heat treatment, their hardness reaches HRC60-65, providing excellent wear resistance, high strength, and good toughness. They can maintain shape stability when bearing loads, resist wear and deformation, and ensure long-term stable operation.
• Cage Material: Made of high-quality steel plates through stamping. The steel plates have good stamping performance, allowing them to be processed into shapes that meet precision requirements. Meanwhile, they have certain strength and toughness, enabling them to withstand the impact and centrifugal force of the steel balls and ensure stable guidance of the steel balls.

IV. Performance Advantages

• Low Friction Resistance: The high-precision fit between the rolling elements and raceways, combined with excellent lubrication performance, results in extremely low friction resistance. This can improve the efficiency of power transmission in equipment and reduce energy loss, significantly enhancing operational efficiency in small motors and other devices.
• High-Speed Adaptability: The precise structural design and high-quality materials enable it to adapt to high-speed environments. During high-speed operation, the steel balls and cage move stably without obvious jumping or jamming, meeting the needs of high-speed equipment such as precision machine tool spindles.
• Compact Structure: With small dimensions, it is suitable for equipment with limited installation space. In small mechanical transmission systems, it can save space while ensuring reliable supporting and transmission performance.

V. Application Fields

VI. Installation and Maintenance Points

• Installation Points: The installation environment must be kept clean to prevent dust and impurities from entering. The fit accuracy between the shaft and the bearing housing is important; it is recommended to select shaft tolerance m6 and bearing housing bore tolerance J7. Professional tools should be used for installation. For hot fitting, the temperature should be controlled between 80℃ and 120℃. After installation, the radial and axial clearances must be inspected to ensure they are within the specified range.
• Lubrication Points: For general working conditions, NLGI Grade 2 lithium-based grease can be used, with a filling amount of 1/3-1/2 of the internal space of the bearing. For high-temperature and high-speed working conditions, it is recommended to use synthetic lubricating oil. Regularly inspect, replenish, and replace lubricants.
• Maintenance Points: Establish a regular maintenance system. Conduct vibration detection once a week and temperature monitoring once a month. If abnormal vibration or excessive temperature is found, shut down the machine immediately for inspection. Keep the equipment operating environment clean, and strengthen sealing protection in dusty environments.