Research & Development>High speed bearings
High speed bearings
When a bearing operates under load, heat is generated internally as a result of rolling, sliding and fluid friction. As the bearing speed increases, the temperature of bearing also increases. If the speed goes too high, bearing temperature would exceed certain limits, the efficiency of the lubricant would fall drastically and the bearing will no longer operate in a stable manner.

In order to control temperature rise at high speed, HCH technol- ogy center successively did experiments and research on dozens of grease that are provided by world famous oil manufacturers, finally decided a few of imported grease that are most suitable for electric power tools characteristics and requirements. Their com- prehensive performance at high speed is very good, especially for lower temperature rise and better life performance. General manufacturers only measure the temperature of bearing outside diameter, which is unscientific. As shown below, bearing surface temperature is only 40°C, while the bearing internal and grease temperature has reached 130°C. HCH has taken the lead to treat bearing inside maximum temperature as a measure of the temperature indicator. When the environment temperature is 25°C, the rotating speed is 18000RPM, HCH bearing and a well-known brand bearing run for two hours under the same axial load of 100N, we compared the bearing highest temperature measured by the thermal infrared imager.



Experiment Condition Bearing Item Highest temperature Average temperature

HCH
bearing

A well-known brand bearing

HCH
bearing

A well-known brand bearing

When the environment temperature is 25°C, the rotating speed is 18000RPM, bearings run for two hours under the same axial load of 100N, we compared the bearing highest tem- perature measured by the thermal infrared imager. Effective measuring distance is 5M.

608 42.26 °C 61.41 °C 31.59 °C 39.89 °C
6201 77.24 °C 132.87°C 54.76 °C 76.10 °C
629 53.69 °C 109.71°C 32.20 °C 53.69 °C
6002 42.41 °C 100.18°C 26.60°C 50.13 °C

The temperature of HCH bearings for running at high speed is much lower than other brands of bearings, HCH bearings can withstand higher speed and have longer life.

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