Dental drill, also known as dental handpiece, is a dental equipment used to polish, drill and treat gums. The drill bit is driven by high-speed turbine, and its speed can reach 400000 rpm. Therefore, there are very high requirements for the quality of dental drill bearing.
Dental Drill Bearings are also called dental bearings,dental handpiece bearings or dental turbine bearings, they are referred high speed miniature bearings used in dental turbine.Usually,the rotation speed of dental drill bearings can be 350000-450000 rpm under the air pressure of 200-250kpa,so the dental drill bearings are required with very high precision and high quality. The inner ring and outer rings of dental drill bearings are made of refined 440 stainless steel, and the balls are made of high precision stainless steel(440) or ceramic(Si3N4) at request, and the cages are made of reinforced phenolic (TORLON) or bakelite (PEEK). The precision tolerance of dental drill bearings is ABEC-7(P4).
Dental drill bearings need to have the following characteristics.
1: High precision, the fit between the shaft and dental drill bearings of the dental drill needs very high precision, and the fit interference between the shaft and the inner hole of the dental drill bearing should be 0-2 цm . The accuracy of the groove of the inner and outer rings of the dental drill bearing is also much higher than that of other bearings. The grade of steel ball used also needs the highest ones. In order to improve the speed and reduce wear, ceramic balls are sometimes used for choice.
2:High speed, the speed of the dental handpiece bearings can reach 400000 rpm or even higher, and ordinary bearings will soon fall apart at such a high speed. Dental handpiece bearings need to use two special materials: reinforced phenolic (TORLON) or bakelite (PEEK) as retainers. These two retainers can not only withstand high temperature, but also prevent dental handpiece bearings from falling apart at high speed.
3: Low noise and low vibration. When the dental drill is used, it will produce some noise and vibration, which will make the patients feel uncomfortable. Therefore, the dental bearings need low noise and low vibration.
4: Rust prevention and corrosion resistance. Due to the extremely high speed of the dental drill, the dental bearings will generate a lot of heat due to friction, so the temperature of the dental bearing will rise. Therefore, it is necessary to continuously use water flow to cool down, which requires the dental bearing to be rust proof and corrosion resistant.
5: Long life
6: RoHs and REACH compliance
Zhangzhou Runstar Bearings Manufacturing Co.;Ltd is a professional dental drill bearings manufacturer, we have been committed to the R & D and production of high-precision dental drill bearings since 2007. The dental drill bearings from Runstar have the characteristics of high precision, high speed, low noise, low vibration, high temperature resistance, corrosion resistance, long life and environmental protection, which are deeply loved and recognized by users.