Double Row Deep Groove Ball Bearing

Design Principles: Utilizing an optimized design combining a deep, curved raceway with high-precision steel balls, the raceway curvature coefficient is precisely calculated to maximize the effective contact area between the steel balls and the raceway. This ensures radial load-bearing capacity while also providing bidirectional axial load-bearing capability. The double-row model employs a double-row symmetrical steel ball layout, forming a dual-load-bearing structure that significantly enhances radial load-bearing capacity and anti-overturning moment performance. An integral inner and outer ring structure strengthens rigidity and reduces accumulated assembly errors. The raceway undergoes ultra-precision grinding (Ra≤0.02μm), optimizing the point contact between the steel balls and the raceway to balance load-bearing capacity and friction loss, achieving low noise, low temperature rise, and high-speed operation. The cage guides the orderly movement of the steel balls, avoiding frictional interference between rolling elements and improving smoothness and service life at high speeds. Performance Characteristics: Core Advantage in Radial Load Bearing: The optimized deep-groove design increases the radial load-bearing capacity of the double-row model by 1.8-2.5 times compared to the single-row model, making it suitable for most common industrial applications where radial loads are the primary load. High-speed, low-noise performance: Optimized raceway and steel ball fit precision, low-friction cage design, single-row models with grease lubrication can reach a maximum speed of 20,000 rpm, and oil lubrication up to 35,000 rpm; the noise level of precision-grade products can be controlled below 20dB, meeting the low-noise requirements of high-end home appliances and precision motors. High-precision interchangeability: P4-level ultra-precision rotational accuracy, radial runout ≤0.001 mm, axial runout ≤0.002 mm, meeting the micron-level operation requirements of precision equipment; standardized ISO dimensional design, can directly replace the same model products of mainstream global brands without changing the equipment installation structure.

Ball Arrangement and Load Distribution: High-precision steel balls are evenly distributed along the arc-shaped deep groove. The cage guides the rolling elements in orderly circular motion, avoiding friction and collisions between the balls. Radial loads are evenly transferred to the inner and outer rings through point contact between the steel balls and the raceway, with the load evenly distributed along the circumference of the steel balls to avoid localized stress concentration. Axial loads are achieved through bidirectional bearing via contact between the raceway sides and the steel balls, capable of withstanding axial forces in both directions. The simultaneous bearing of radial loads, bidirectional axial loads, and overturning moments by double rows of symmetrical steel balls significantly improves load-bearing capacity and operational stability. Installation and Adaptation: The inner and outer rings adopt standard interference/transition fits with the shaft and housing (shaft k6/js6/bore H7/H8), fully complying with ISO international tolerance standards and compatible with the assembly tolerance requirements of most industrial equipment; double-row models are all integral structures, which can be directly and independently installed without pairing adjustments, making assembly extremely easy; standardized size design allows direct replacement of bearings of the same model from mainstream global brands without changing the equipment installation structure, perfectly adapting to the maintenance, replacement and upgrade of existing equipment; by selecting different seal types, cage materials and lubrication schemes, it can accurately adapt to different working conditions such as high speed, heavy load, low noise, and corrosion resistance.