6900z Deep Groove Ball Bearing

As a classic model of the 69-series deep groove ball thin-wall bearings, the 6900ZZ thin-wall bearing has become a core basic component in the field of industrial precision transmission by virtue of its compact and lightweight design, high-precision rotation performance and wide adaptability. With its precise dimension control, excellent high-speed operation capability and reliable sealing protection features, it plays an irreplaceable role in precision equipment with limited space, covering a variety of high-demand application scenarios such as industrial robots, micro-motors and instruments.

 

In terms of core structure and dimensional parameters, the 6900ZZ thin-wall bearing complies with the internationally accepted metric measurement standard. Its key dimensions are accurately set at an inner diameter of 10mm, an outer diameter of 22mm and a width of 6mm, with an overall weight of only about 0.009kg. The extremely streamlined cross-sectional design greatly saves installation space, providing more possibilities for the miniaturization design of equipment.

This model adopts a single-row deep groove ball structure, with 9 small-sized steel balls of 3.175mm in diameter as rolling elements, combined with a stamped cage, forming a transmission structure with low friction torque. It can not only effectively bear radial loads, but also cope with bidirectional axial loads, adapting to the force-bearing requirements of most precision transmissions. Its minimum chamfer size is 0.3mm, which meets the general installation adaptation standard, and the inner ring tolerance is controlled within the high-precision range of 0~-8μm, ensuring a tight fit with shaft components.

 

In terms of performance advantages, the 6900ZZ thin-wall bearing demonstrates three core highlights.

First, it has ultra-high speed adaptability. Under grease lubrication conditions, its limiting speed can reach 32000~36000rpm, far exceeding the speed level of ordinary bearings. This benefit comes from its lightweight ring design and optimized rolling contact structure, which effectively reduces the inertial force during high-speed rotation and ensures operational stability. Second, it has reliable load-bearing performance. Despite its thin-wall structure, its basic dynamic load rating can reach 2695~2970N, and the basic static load rating is 1270~1273N. By adopting high-quality bearing steel materials and precision raceway processing technology, it achieves a balance between rigidity and load-bearing capacity in a thin and light structure. Third, it has excellent protection and durability.

The "ZZ" in the model represents a double-sided metal dust cover sealing structure, which can effectively prevent dust and impurities from entering the bearing interior and avoid grease leakage. Combined with factory pre-lubrication treatment, it can be directly installed and used without additional initial lubrication, significantly reducing maintenance costs.

 

Materials and manufacturing processes are the core guarantee for the performance of the 6900ZZ bearing. Mainstream products use high-purity chromium steel as the material for rings and rolling elements. After vacuum quenching and tempering treatment, they have excellent hardness and wear resistance. Some high-end models can be optionally equipped with 440C stainless steel materials, which greatly improve corrosion resistance, can adapt to special working conditions such as humidity and multi-media environments, and expand the operating temperature range to -60℃~+300℃.

The production process strictly complies with the JIS Class 0 accuracy standard, and undergoes more than 60 precision processes such as quenching, superfinishing, full-size inspection and full-noise inspection to ensure the rotation accuracy and operation stability of each product. It operates with low vibration and low noise, meeting the noise reduction requirements of precision equipment.

 

The wide range of application scenarios directly reflects the market value of the 6900ZZ thin-wall bearing. In the field of industrial automation, its high precision and high-speed performance make it a core transmission component for industrial robot joints and rotary encoders, ensuring the precise positioning of robot movements and the signal acquisition accuracy of encoders. In the field of motors and electric tools, it is suitable for stepping motors, micro DC motors, electric screwdrivers and other equipment, providing stable support for their high-speed operation and improving equipment efficiency and service life.

In the field of office and consumer electronics, its compact size and low-noise characteristics perfectly meet the lightweight and noise reduction requirements of precision transmission mechanisms of equipment such as printers, scanners and cooling fans. In addition, the 6900ZZ bearing also becomes a preferred component with its reliable performance in fields such as medical equipment (such as dental drills, centrifuges), precision instruments and smart homes.

 

As a standardized and highly adaptable Precision Bearing, the 6900ZZ complies with general specifications and can be interchanged with the same-type products of different brands. Meanwhile, it supports the volume discount policy for bulk purchasing, meeting the procurement needs of production enterprises of different scales. Its ROHS-compliant design also meets environmental protection requirements, applicable to various green production scenarios. Whether for small equipment pursuing extreme space utilization or automated equipment requiring high-speed precision transmission, the 6900ZZ thin-wall bearing has become an ideal choice for precision transmission systems with its balanced performance, reliable quality and wide adaptability.