Has analyzed Japan NMB miniature bearing internal clearance and preloading

Has analyzed Japan NMB miniature bearing internal clearance and preloading bearings as a spindle and motor system an extremely important component, in this play a key role, on many occasions, and laying the foundation for the application of the achieved very high performance. Today the author want to introduce is the miniature bearing, miniature bearing has extensive USES. Suitable for high speed rotation, low friction torque, low vibration, low noise requirements of the product. The main products are precision micro NMB miniature bearing, all kinds of high precision machinery, electronic components, etc. As the miniature bearing industry in the world's largest manufacturer, since 1951 launched all kinds of precision bearing, bearing is widely used in precision instruments, VCR, air conditioner, vacuum cleaners, auto motors. The miniature bearing internal clearance and preloading how much knowledge you know? The author will give you a good introduce today! Product features: a small aperture in the miniature bearing, inner diameter phi subminiature bearing under 2 mm 68 metric on a total of 18, 69, 60 series, inch on a total of 6 R series, based on this, also can be divided into different dust cover series, stainless steel series, flange series and so on. Miniature bearing is suitable for all kinds of industrial machines, small rotation, etc. ; Recently, the device miniaturization, lightweight, thin wall type of demand tends to increase. Main use: micro-motor, pressure rotor dental teeth, drilling hard drives, motors, stepper motors, VCR, drum, soft drive, OA equipment, office equipment, such as soft drive industry application. Bearing internal clearance: ball bearing internal clearance for service life, vibration, sound, fever and so on bearing performance have a significant impact. Therefore, according to the purposes and select the appropriate internal clearance is very important. Clearance can be divided into the radial clearance, axial clearance, clearance three clearance Angle. Bearing preloading: when the ball bearing in motor, in axial direction and a load that radial clearance to 0. Add preloading because a radial clearance, the rotation of the ball bearing vibration is big, and the bearing rigidity weakening, etc. , the rotating vibration on the axial load is called the preloading. Preloading is not arbitrary decision, should according to the bearing size choices. Preset pressure obtained is too big, can shorten the service life, and the friction torque is bigger. Preset pressure is too small, and will increase the vibration, rigid, the raceway surface micro vibration caused by wear and tear. Therefore, in the use of ball bearing, it is very important to correctly set a preset pressure.