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1. Material

Outer and Inner Rings

The outer and inner rings of the S672ZZ bearing are constructed from premium 440C stainless steel. This material is selected for its outstanding mechanical properties. It has high hardness, which enables the rings to withstand the pressure and friction generated during operation. Moreover, 440C stainless steel exhibits remarkable corrosion resistance, making the bearing applicable in humid or even slightly corrosive environments, such as some food processing equipment or outdoor small - scale machinery.

Balls

The rolling balls inside the S672ZZ bearing are also made of 440C stainless steel. These balls undergo a precise grinding process to achieve a smooth surface and accurate spherical shape. This high level of precision ensures that the balls can roll freely between the inner and outer rings, reducing friction and improving the overall efficiency of the bearing. The use of 440C stainless steel for the balls also ensures that they have the same excellent wear resistance as the rings, contributing to the long service life of the bearing.

Cage

The cage of the S672ZZ bearing is made from 304 stainless steel. 304 stainless steel is known for its good ductility and toughness, which allows the cage to effectively hold the balls in position even during high - speed rotation. It also has good corrosion resistance, ensuring that the cage can work stably in various environments without being easily damaged by rust.

Shields

Both sides of the S672ZZ bearing are equipped with shields made of 304 stainless steel. These shields form a protective barrier, preventing dust, dirt, and other small particles from entering the bearing's interior. This protection is crucial because foreign substances can cause increased friction, wear, and even damage to the bearing's components. At the same time, the shields help to retain the lubricant inside the bearing, ensuring that the moving parts are properly lubricated at all times.

2. Performance

Load - Bearing Ability

• Dynamic Load Capacity: The S672ZZ bearing has a dynamic load capacity of about 28.5 N. This means that when the bearing is rotating, it can bear a continuous radial load of this magnitude without suffering premature failure. The rational distribution of the load among the balls and the high - strength materials used in the bearing's construction are the key factors contributing to this dynamic load - bearing capacity.

• Static Load Capacity: It can bear a static load of approximately 36 N. This static load capacity is important when the bearing is in a stationary state, such as when a machine is shut down but still has a load acting on the bearing. The ability to withstand static loads ensures that the bearing does not deform or get damaged under such conditions.

Rotational Speed

The S672ZZ bearing can reach a maximum rotational speed of 85,000 rpm under appropriate working conditions. This high - speed performance is achieved through the precise manufacturing of its components. The smooth surfaces of the rings and balls, along with the optimized design of the cage, minimize the friction between the moving parts, allowing the bearing to rotate at high speeds with low noise and vibration. However, it should be noted that the actual speed may be limited by factors such as lubrication condition, operating temperature, and the type of load applied.

Lubrication

Adequate and appropriate lubrication is vital for the S672ZZ bearing. The bearing is pre - lubricated with high - quality grease during production, which provides initial lubrication. However, during long - term use, it may be necessary to re - lubricate the bearing depending on the operating conditions. The lubricant not only reduces friction but also helps to dissipate the heat generated during operation and prevents corrosion of the bearing's components. The choice of lubricant should be based on factors such as the operating temperature range and the speed of the bearing.

Temperature Resistance

The S672ZZ bearing can function normally within a temperature range of - 20 °C to 120 °C. The 440C stainless steel used for the rings and balls, as well as the 304 stainless steel for the cage and shields, maintains its structural stability and mechanical properties within this temperature range. This allows the bearing to be used in both cold and moderately high - temperature environments, expanding its application scope.

Radial Clearance

The radial clearance of the S672ZZ bearing is usually in the range of 0.001 mm to 0.012 mm. This small clearance is designed to ensure that the bearing has good rotational accuracy. It allows for a small amount of movement between the inner and outer rings, which helps to compensate for the thermal expansion that occurs during operation and reduces the risk of jamming.

3. Applications

Medical Equipment

In the medical field, the S672ZZ bearing is widely used in some small - sized medical devices. For example, in insulin pumps, which require precise and stable operation, the bearing is used in the motor that drives the pump's mechanism. Its small size, low noise, and high reliability make it suitable for such applications where patient comfort and device accuracy are critical. Additionally, its corrosion resistance ensures that it can meet the strict hygiene requirements of medical equipment.

Consumer Electronics

Consumer electronics, such as portable video cameras and small - sized printers, often incorporate the S672ZZ bearing. In portable video cameras, it is used in the lens rotation mechanism, enabling smooth and precise focusing. In small - sized printers, it is used in the paper feeding roller drive system, ensuring stable paper feeding. The bearing's compact size allows it to fit into the limited space of these electronic devices, while its good performance ensures the normal operation of the devices.

Toys and Small Appliances

The S672ZZ bearing is also commonly found in toys and small appliances. For example, in remote - controlled toy cars, it is used in the wheel axles, reducing friction and allowing the cars to run smoothly. In small electric fans, it is used in the motor's rotor, ensuring quiet and efficient operation. Its low cost and reliable performance make it a popular choice in these mass - produced products.