1, the holder sound "å” Lee å” Lee ......": Analysis of the reasons: by the cage and rolling body vibration, collision, regardless of the type of grease may arise, to withstand torque, load or radial clearance big time more Easy to produce. Solution: A, to improve the cage precision; B, use a small bearing clearance or bearing preload; C, reduce the torque load, reduce installation errors; D, the choice of good grease. 2, continuous buzzing sound "buzzing": Analysis: The motor is no-load operation is issued a beep-like sound, and the motor axial abnormal vibration, open or shut down when the "Om" sound. Specific features: Multiple lubrication state is not good, winter and both ends of the ball bearing motor with multiple, mainly when the shaft alignment performance is not good, under the influence of axial vibration generated an unstable vibration. Solution: A, with good lubricating grease; B, plus pre-load, reducing installation errors; C, the choice of small radial clearance bearings; D, to improve the rigidity of the motor bearing; Note: The fifth point has played a fundamental role in improving the use of 02 small groove curvature, 01 groove curvature. 3, paint rust: Analysis: As the motor bearing shell oil dry, volatile chemical composition of the bearing surface corrosion, outer groove and channel, so that the channel after the corrosion of the abnormal sound. Specific features: After the corrosion of the bearing surface rust more serious than the first. Solution: A, the rotor, chassis, drying or drying assembly; B, reduce the motor temperature; C, choose to adapt to the paint model; D, to improve the motor bearing placed in the ambient temperature; E, Less rust caused by grease, silicone oil, mineral oil most likely to cause; F, using vacuum impregnation process. 4, impurities tone: Analysis: caused by the cleanliness of bearings or grease, issued an irregular abnormal sound. Specific features: Even occasional no sound, when the big small no rules, multiple high-speed motor. Solution: A, selection of good grease; B, improve the cleanliness before fatting; C, to enhance the sealing performance of the bearing; D, to improve the cleanliness of the installation environment. 5, high frequency, vibration sound "da da ......": Specific features: the sound frequency changes with the bearing speed, parts surface waviness is the main cause of noise. Solution: A, to improve the quality of the bearing raceway surface processing to reduce the amplitude of waviness; B, to reduce bumps; C, correct preload and clearance play, check the free end of the bearing operation, improve the accuracy of shaft and bearing installation method. 6, heating: specific features: bearing operation, the temperature exceeds the required range. Analysis: A, too much grease, lubricant resistance increases; B, too small internal clearance caused by excessive load; C, installation error; D, sealing equipment friction; E, bearing creep. Solution: A, the correct choice of grease, the amount of appropriate; B, correct preload and clearance play, check the free end of the bearing operation; C, to improve the bearing accuracy and installation methods; D, to improve the sealing form. 7, the bearing feel bad: Specific features: Rotating the rotor with a bearing feel the bearing inside the impurities, block sense. Analysis: A, excessive clearance; B, with the shaft diameter and improper fit; C, channel damage. Solution: A, clearance as small as possible; B, the choice of tolerance zone; C, improve accuracy, reduce damage to the channel; D, grease selection.