Dental drill mobile phone bearings are the core mechanical components of high-speed dental drill equipment in dental medical devices, and belong to the specialized bearings for dental dentists' mobile phones. Its typical application scenario is oral treatment equipment with a speed of 350000 to 450000 revolutions per minute, which has the characteristics of high speed, low noise, and wear resistance The bearing consists of components such as a shaft, worm gear, spring clamp, rolling bearing, rubber locating ring, and housing, and is designed with an elastic support structure. The outer ring of the bearing is fixed to the housing through a rubber positioning ring, and the back cover and spring ring are responsible for axial fastening. The spring clamp directly clamps the drill bit to achieve high-speed rotation. The collar is made of corrosion-resistant 440C stainless steel, and the rolling elements are made of Si3N4 ceramic balls (with a thermal expansion coefficient of only 25% of steel balls) according to the speed requirements. The retainer is made of high-temperature resistant polyimide TORLON material
