• Deep Groove Ball Bearing
• Self-aligning Ball Bearing
• Angular Contact Ball Bearing
• Thrust Ball Bearing
• Tapered Roller Bearing
• Spherical Roller Bearing
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• Spherical Roller Thrust Bearing
• Cylindrical Roller Thrust Bearing
• Needle Roller Bearing
• Pillow Block Bearing
• Plummer Block Housing
• Adapter Sleeve & Withdrawal Sleeve
• Spherical Plain Bearing & Rod End
• Linear Motion Ball Bearing
• Auto Bearing
• Agricultural Bearing
• Stainless Steel Bearing
• Full Ceramic Bearing
• Steel Ball
• Special Bearing

1. Dimensions

Consistent with its standard counterpart, it features a bore diameter of 1.5 mm, an outer diameter of 4 mm, and a width of either 1.2 mm or 2 mm. This compact sizing makes it perfect for integration into miniature mechanical systems where space is extremely limited.

2. Material

• Inner and Outer Rings: The inner and outer rings of the S681XZZ stainless steel bearing are manufactured from premium stainless steel, typically 440C. 440C stainless steel boasts excellent corrosion resistance, which is a key advantage over traditional chrome steel. It can withstand exposure to moisture, chemicals, and other corrosive substances without rusting or deteriorating easily. For example, in a humid environment like a food processing machine's small components, the stainless - steel rings remain intact, ensuring the bearing's long - term performance. Additionally, 440C offers good hardness and wear resistance, allowing the bearing to handle the stresses of operation effectively.

• Balls: The balls are also made of 440C stainless steel. Precision - ground to exacting standards, these balls ensure smooth rotation and efficient load distribution. The stainless - steel balls maintain their integrity even in harsh conditions, contributing to the bearing's overall durability. Their high - quality surface finish reduces friction and wear during operation.

• Shields (ZZ): The two metal shields ("ZZ") are crafted from stainless steel as well. This stainless - steel shielding provides not only the same protective function as standard steel shields but also adds to the bearing's corrosion resistance. The shields form a tight seal around the bearing, preventing the ingress of contaminants while withstanding corrosive elements themselves. This makes the bearing suitable for use in environments where exposure to water or chemicals is common.

3. Performance

• Corrosion Resistance: The most prominent performance feature of the S681XZZ stainless steel bearing is its exceptional corrosion resistance. Unlike chrome steel bearings, which are prone to rust in moist or chemical - rich environments, this stainless steel bearing can operate reliably in such conditions. It can resist the effects of water, salt spray, weak acids, and alkalis, making it ideal for applications in marine equipment, food processing machinery, and medical devices where hygiene and resistance to corrosion are critical.

• Load - Carrying Capacity: Despite being made of stainless steel, it retains a good load - carrying capacity. The 440C stainless steel's mechanical properties allow it to handle both radial and axial loads effectively. The deep - groove design ensures even load distribution across the balls and raceways, enabling it to support rotating shafts in various miniature applications. For instance, in a small - sized marine pump, it can bear the loads generated during operation without compromising performance.

• Temperature Resistance: This bearing exhibits better temperature resistance compared to some other bearing materials. It can operate within a wider range of temperatures, from low - temperature environments to moderately high temperatures. This makes it suitable for use in applications where temperature fluctuations are common, such as in certain industrial ovens' small components or refrigeration equipment.

• Rotation Speed and Friction: It maintains a high rotational speed capability, similar to its non - stainless steel counterpart. The smooth interaction between the stainless - steel balls and raceways, along with proper lubrication, ensures low friction during operation. This low friction contributes to energy efficiency and reduces heat generation, allowing the bearing to operate at high speeds for extended periods. For example, in a small - scale medical centrifuge, it can rotate at high speeds smoothly, ensuring accurate separation of samples.

4. Sealing

The double stainless - steel shields provide effective protection against contaminants while enhancing the bearing's corrosion resistance. The shields prevent dust, dirt, and liquids from entering the bearing's internal components, ensuring long - term reliable operation. The sealing performance is particularly beneficial in wet or dirty environments, as it helps maintain the lubricant's effectiveness and protects the bearing from damage.

5. Applications

• Food and Beverage Machinery: In the food and beverage industry, where hygiene and corrosion resistance are paramount, the S681XZZ stainless steel bearing is widely used. It can be found in small conveyors, mixers, and filling machines. For example, in a small juice - filling machine, the bearing's corrosion resistance prevents contamination from fruit juices, ensuring the safety and quality of the product.

• Medical and Pharmaceutical Equipment: Medical devices and pharmaceutical machinery require bearings that can withstand frequent cleaning and sterilization. This stainless steel bearing is suitable for use in small motors of medical pumps, surgical tools, and laboratory equipment. Its corrosion resistance ensures that it remains functional even after exposure to disinfectants and cleaning agents.

• Marine and Coastal Applications: In marine environments, where saltwater and high humidity are prevalent, the S681XZZ stainless steel bearing performs exceptionally well. It can be used in small - sized winches, pumps, and sensors on boats and coastal equipment. Its ability to resist saltwater corrosion ensures a long service life in these harsh conditions.

Outdoor and Recreational Equipment: Outdoor equipment such as small - sized power tools, camping gear, and sports equipment can benefit from this bearing. For example, in a small - scale electric bicycle's motor, it can withstand exposure to rain and moisture, ensuring reliable operation during outdoor rides. In precision fishing reels, its smooth rotation and corrosion resistance contribute to a better fishing experience.