The ELITECH hammer drill was purchased in a store 4 months ago. The resource of this hammer drill was enough for one and a half objects, and I work with it as intended. In general, I stopped hammering. If you give the hammer drill under warranty, then they will take it for 45 days, and since I need to work, I decided to repair it myself. In this video, I showed the revision process, and showed the reason for the failure of the hammer drill.