In order to solve the problem that the upper and lower axles of the high speed sewing machine in the existing technology need to be coated with grease in the outer bearing of the rotating axle in order to maintain the rotating stability of the rotating axle, but it is very easy to leak out and affect the work of the sewing machine because of the perennial use of grease. At the same time, due to the introduction of dust, it will greatly affect the performance and service life of the rotating axle. The company provides a new type of lubricating grease. Sealed bearings for sewing machines are simple in structure and convenient in use, which can prevent grease from overflowing and dust from entering.