full ceramic bearings

Deep groove ball bearing with seals or shields

Single row deep groove ball bearings with seals or shields are particularly versatile, have low friction and are optimized for low noise and low vibration, which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than many other bearing types. The integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearings and contaminants out.Integral sea

ling prolongs bearing service life

Simple, versatile and robust design

Low friction and high-speed capability

Accommodate radial and axial loads in both directions

Require little maintenance

Knowledge and introduction of bearings    :                                                                                                 

Full ceramic bearings are a type of bearing that is constructed entirely from ceramic materials, offering a range of unique advantages and properties that make them suitable for a variety of specialized applications. Here's a detailed introduction:

1. Materials and Composition:

• Full ceramic bearings are made from materials such as Silicon Nitride (Si3N4), Zirconium Oxide (ZrO2), or Silicon Carbide (SiC). These materials are known for their exceptional hardness, smoothness, stiffness, and resistance to wear, corrosion, and high temperatures .

2. Advantages:

• Temperature Resistance: These bearings can operate in extreme temperature environments, from as low as -85°C up to +800°C, making them suitable for applications with wide temperature fluctuations .

• Corrosion Resistance: Ceramic materials like Si3N4 are well-suited for use in water, salt water, and environments with certain acids and alkalis, making them ideal for marine applications where they can be fully submerged without material degradation .

• Electrical Resistance: Full ceramic bearings are non-magnetic and have electrically insulating properties, which is beneficial in applications where electrical conductivity must be avoided .

• Low Coefficient of Friction: Compared to stainless steel bearings, ceramic bearings have an extremely low coefficient of friction, which is advantageous in applications requiring low turning resistance .

3. Applications:

• Full ceramic bearings are used in extreme and special environments such as aerospace, military industries, semiconductor manufacturing, and non-magnetic equipment . They are also used in cryogenic technology, thermonuclear fusion, and other fields where high precision and adaptability to harsh conditions are required .

4. Technical Challenges:

• One of the challenges with full ceramic bearings is the disparate thermal expansion coefficients between the ceramic materials and steel housings, which can lead to thermally induced loosening and misalignment of rotary centers, exacerbating rotor system vibration with rising temperature . This is a crucial factor in the design and performance enhancement of aerospace engines and other precision machinery.

5. Manufacturing Process:

• The manufacturing process for ceramic bearings involves raw material proportioning, molding and sintering, component processing, and assembly testing. Ultra-precision processing technology for hard and brittle materials is a technical difficulty and bottleneck in achieving higher precision levels for ceramic bearings .

6. Performance Under Extreme Conditions:

• Full ceramic ball bearings have been studied for their adaptability under extreme conditions such as cryogenics and heavy loads. The thermal deformation coefficient of silicon nitride is only about 30% of bearing steel, and its density is only about 40%, showing advantages in accuracy, stability, wear resistance, and long life under cryogenic and heavy load conditions .

In summary, full ceramic bearings offer a combination of properties that make them indispensable in high-precision fields and extreme environments. Their high-temperature resistance, corrosion resistance, and self-lubricating characteristics, along with their light weight and hardness, make them superior substitutes for traditional bearing steel in many applications .

For further details on this product please directly contact our sales department under shh@dmsw.com 

 Our products                                                                                                                                                                 

Ball Bearings

SKF

NSK

FAG

TIMKEN

          IKO

NTN

GMN