"The quality of your bearings is unstable!" When Mr. Hu, a technical service engineer of our company, received a call from Mr. Zhang, the purchasing manager of a motor factory, he felt a little uneasy.
The ZV3 grade motor bearings that the customer had just accepted three weeks ago had abnormal noise problems after batch delivery. Mr. Hu rushed to the customer's factory with testing equipment that day. After a series of inspections, Mr. Hu found that the clearance between the motor bearing and the motor housing was obviously abnormal.
It turned out that the customer felt that the bearing installation was laborious during the trial production, so he enlarged the inner diameter of the motor housing a little. It was this change that caused the radial clearance of the motor bearing to be too large during operation, and the collision between the steel ball and the raceway produced abnormal noise. "It's like walking in shoes that are two sizes larger. The bearings "dangle" in the loose housing, and the life span is shortened by at least 60%." Mr. Hu explained while measuring the deformed housing with a vernier caliper.
In the end, we not only reworked 2,000 sets of motor bearings for free, but also assisted in adjusting the parameters of the later bearings. Now the unqualified rate of the motor has dropped from 23% to 0.5%. Kent Bearing reminds all motor manufacturers: seemingly simple size matching is the result of precise calculation of more than 20 parameters such as material thermal expansion coefficient and assembly stress distribution. Choosing a professional bearing manufacturer can save time and effort, reduce costs and increase efficiency. Kent Bearing always practices the concept of "technical pre-service" and provides customers with value-added services such as matching tolerance calculation and installation guidance for free. You only need to make a phone call +86 19957426729 (Whatsapp), and we will escort your product upgrade throughout the process.