Hybrid Ceramic Insert Ball Bearing

KOMEL is a type of external ball ceramic hybrid ball bearing used to produce two ceramic and steel bearing surfaces.

Rolling Elements: They are usually made of ceramic materials. Common ceramic materials include silicon nitride (Si₃N₄), silicon carbide (SiC), etc. These ceramic rolling elements have remarkable characteristics such as high hardness, low density, strong wear resistance, good chemical stability, and high temperature resistance. Compared with traditional steel rolling elements, ceramic rolling elements are lighter in weight and have a smaller moment of inertia. During high-speed operation, they can effectively reduce the centrifugal force and frictional heat generation, thereby improving the operational stability and service life of the bearings.

The inner and outer rings are generally made of bearing steel. Bearing steel has good strength and toughness and can withstand relatively large loads, providing a reliable support structure for the bearings. This combination of ceramic rolling elements and steel inner and outer rings gives full play to the respective advantages of ceramic materials and metal materials, not only ensuring the high load-bearing capacity of the bearings but also improving their high-speed performance and wear resistance.

The function of the cage is to evenly separate the ceramic rolling elements and guide them to roll correctly on the raceways. The materials of the cage usually include engineering plastics (such as polytetrafluoroethylene) and metals (such as stainless steel). The engineering plastic cage is light in weight and has a small friction coefficient, which can further reduce the running resistance of the bearings. The metal cage, on the other hand, has high strength and rigidity and is suitable for working conditions with high loads and high speeds.

These bearings have characteristics such as good self-aligning performance, excellent high-speed performance, relatively high load-bearing capacity, and resistance to wear and corrosion. They are widely used in the industrial field, new energy field, aerospace field, medical device field, food and beverage field, and semiconductor manufacturing field.

Parameter (Specification)

Suffixes

Material Suffix

H: It indicates ceramic balls. For example, 6205 - H represents a deep groove ball bearing of model 6205 with ceramic balls as the rolling elements.

T: It may indicate a cage made of ceramic materials. If it is the combined suffix "HT", it means the bearing has both ceramic balls and a ceramic cage.

Tolerance Grade Suffix

P4: It indicates that the bearing's tolerance grade complies with the ISO 4 - level standard. It belongs to a high - precision grade and is usually used in equipment with high - precision requirements, such as the spindles of precision machine tools.

P5: The tolerance grade complies with the ISO 5 - level standard. Its precision is slightly lower than that of P4, and it is also widely used in some industrial equipment with certain precision requirements.

Clearance Suffix

C3: It indicates that the radial clearance of the bearing is larger than the standard clearance. It is suitable for situations where the bearing will generate significant thermal expansion during operation, preventing the bearing from seizing due to thermal expansion.

C4: The clearance is larger than that of C3. It is often used in high - temperature, high - speed, or high - load working conditions.

CM: It represents the clearance for motors, which is a special clearance range suitable for equipment such as motors with high requirements for vibration and noise.

Sealing Suffix

Z: It indicates that the bearing has a dust cover on one side, which can prevent dust and other impurities from entering the bearing.

ZZ: It means that the bearing has dust covers on both sides.

RS: It indicates that the bearing has a contact - type rubber seal on one side. The sealing effect is good, which can prevent lubricating oil leakage and the intrusion of external impurities, but it will increase a certain friction torque.

2RS: It means that the bearing has contact - type rubber seals on both sides.

Application

Industrial Field: In large-scale industrial machinery such as mining machinery, heavy-duty machine tools, and textile machinery, hybrid ceramic insert ball bearings can, by virtue of their self-aligning function and wear-resistant and corrosion-resistant properties, adapt to harsh working environments and the deflection deformation of shafts, ensuring the stable operation of the equipment. For example, in equipment such as crushers and ball mills in mines, the bearings need to withstand huge impact loads and harsh working environments, and hybrid ceramic insert ball bearings can effectively deal with these challenges.

New Energy Field: In wind turbine generator sets, they can be used in key components such as the main shaft and gearbox. During the operation of a wind turbine, the shaft is subjected to complex loads and vibrations. The self-aligning performance and high load-bearing capacity of hybrid ceramic insert ball bearings can adapt to the deformation of the shaft under different working conditions of the wind turbine, improving the reliability and service life of the equipment and reducing the maintenance cost.

Aerospace Field: In some components of aircraft engines and airplanes, the requirements for the performance and reliability of bearings are extremely high. The characteristics of hybrid ceramic insert ball bearings, such as low density, high performance, self-aligning ability, and corrosion resistance, enable them to meet the stringent requirements of the aerospace field and ensure the normal operation of the equipment. For example, in the landing gear system of an aircraft, the bearings need to maintain good operating performance while withstanding huge impact forces, and hybrid ceramic insert ball bearings can well meet this requirement.

Medical Device Field: In medical devices such as CT scanners and dental surgical equipment, bearings with high precision, low noise, and no pollution are required. The low-friction, high-cleanliness, and corrosion-resistant properties of hybrid ceramic insert ball bearings can meet the special requirements of medical devices, ensuring the normal operation of the equipment and the safety of patients. For example, in a dental hand piece, the high precision and low noise performance of the bearings are crucial for the precise operation of the surgery.

Food, Beverage and Semiconductor Manufacturing Fields: In the food and beverage processing industry, the non-toxic and harmless properties of ceramic materials can prevent product contamination, meeting the hygiene standards of the food industry. In semiconductor manufacturing equipment, its high precision, low pollution, and corrosion resistance can meet the strict requirements of the production process for the equipment, ensuring the precision and quality of chip manufacturing. For example, during the manufacturing process of semiconductor chips, the requirements for the cleanliness of the equipment are extremely high, and hybrid ceramic insert ball bearings can effectively prevent contamination and ensure the smooth progress of production.