BestQuality Zirconia (ZrO2) full ball ceramic bearing 6902 Xingruida high temperature resistant ceramic bearing manufacturer Factory

Before choosing, let's understand the characteristics of three kinds of materials commonly used in ceramic bearings

Silicon nitride ceramic bearing

The ring and rolling element of silicon nitride ceramic bearing are made of silicon nitride (Si3N4) ceramic material, and the retainer is made of polytetrafluoroethylene, nylon 66, polyetherimide, zirconia, silicon nitride, stainless steel or special aviation aluminum.

Features of silicon nitride ceramic bearing products:

1. High speed: it has the advantages of cold resistance, small force elasticity, high pressure resistance, poor thermal conductivity, light weight, small friction coefficient, etc. it can be used in 12000 RPM ~ 75000 RPM high-speed spindle and other high-precision equipment;

2. High temperature resistance: the material itself has high temperature resistance of 1200 ℃ and good self lubrication, and the use temperature is between 100 ℃ and 800 ℃, without expansion caused by temperature difference. It can be used in furnace, plastic, steel and other high temperature equipment;

3. Corrosion resistance: the material itself has the characteristics of corrosion resistance, can be used in strong acid, strong alkali, inorganic, organic salt, sea water and other fields, such as electroplating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment, etc.

4. Antimagnetism: because of no magnetism and no dust absorption, it can reduce bearing spalling ahead of time and high noise. It can be used in demagnetization equipment. Precision instruments and other fields.

5. Electrical insulation: because of the high electrical resistance, the bearing can be free from arc damage, which can be used in various electrical equipment requiring insulation.

6. Vacuum: due to the unique oil-free self-lubricating property of ceramic materials, in ultra-high vacuum environment, silicon nitride all ceramic bearings can overcome the problem that ordinary bearings can not achieve lubrication.

Zirconia ceramic bearing

The rings and rolling elements of zirconia ceramic bearings are made of zirconia (ZrO2) ceramic materials, and the retainers are made of polytetrafluoroethylene (PTFE), nylon 66, polyetherimide, zirconia, silicon nitride, stainless steel or special aviation aluminum.

Features of zirconia ceramic bearing products:

1. High speed: it has the advantages of cold resistance, small force elasticity, high pressure resistance, poor thermal conductivity, light weight, small friction coefficient, etc. it can be used in high-speed spindle of 12000 RPM ~ 50000 rpm and other high-precision equipment;

2. High temperature resistance: no expansion caused by temperature difference when the service temperature is between 100 ℃ and 600 ℃. It can be used in furnace, plastic, steel and other high temperature equipment;

3. Corrosion resistance: the material itself has the characteristics of corrosion resistance, can be used in strong acid, strong alkali, inorganic, organic salt, sea water and other fields, such as electroplating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment, etc.

4. Antimagnetism: because of no magnetism and no dust absorption, it can reduce bearing spalling ahead of time and high noise. It can be used in demagnetization equipment. Precision instruments and other fields.

5. Electrical insulation: due to high electrical resistance, it can avoid arc damage to bearings, and can be used in various electrical equipment requiring insulation.

6. Vacuum: due to the unique oil-free self-lubricating property of ceramic materials, zirconia ceramic bearings can overcome the problem that ordinary bearings can not achieve lubrication in ultra-high vacuum environment.

Silicon carbide ceramic bearing

Silicon carbide all ceramic bearing rings and rolling elements are made of pressureless silicon carbide (SSIC) ceramic materials, and the retainer is made of PTFE as the standard configuration. Compared with zirconia bearing materials and silicon nitride bearing materials, they can be applied to higher temperature and more severe corrosive environment.

Application: in extremely harsh environment and special places, such as ultra-high temperature environment (full ball type is recommended), it can withstand up to 1300 ℃. For example, in high corrosive chemicals (PTFE is recommended to be used as cage type material), it has long wear resistance and service life, because its hardness is as high as hrc90.

Compared with other types of ceramic bearings, SiC material has the following advantages

High chemical corrosion resistance, good strength, high hardness, high wear resistance, low friction performance, suitable for the highest temperature.

After browsing the three kinds of materials used in encike ceramic bearing, we have a general understanding of the three kinds of materials. The main difference is divided into high temperature resistance and speed difference. The obvious difference between zirconia and silicon nitride is that zirconia is white and silicon nitride is black. In terms of rotational speed, the limit rotational speed of BFM zirconia ceramic bearing is 12000-5000 rpm, the high temperature resistance is 100-600 ℃, and the limit rotational speed of HMS silicon nitride ceramic bearing is 12000-7500 rpm, the high temperature resistance is 100-800 ℃. Silicon carbide ceramic bearing is the ultimate boss of ceramic bearing. It can be used in harsh environment and special places, and its high temperature resistance can reach 1300 degrees. It can be used in ultra-high temperature and more severe corrosion-resistant environment. The unit price of zirconia bearing made of three materials is relatively affordable. Silicon nitride bearing is more expensive than zirconia bearing. Silicon carbide is the ultimate boss of ceramic bearing, and the unit price is the most expensive. To sum up, in the selection of ceramic bearing material "do not seek the best.". But the most expensive one doesn't work. Instead, you don't have to choose the most expensive one. You have to choose the one that suits you best.

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