Although the 4 1/2 super thin cutting disc is very easy to use, and it is also popular among users, it will inevitably have some problems in the course of use. So what are these problems? Let me explain it to you today. First, there is a strange sound when sawing: 1) Shutdown cleaning, check whether the number of cutting teeth is applicable; 2) re-grinding the cutting piece; 3) Check the workpiece clamping device. Second, the cutting piece manufacturers saw the workpiece is not vertical and the length is inconsistent: 1) Select a good material and standard materials, and always check the condition of the rack and the positioning rule to correct the level of the machine; 2) Select the correct lower knife speed according to different materials, and select the number of teeth according to the wall thickness of the material; 3) Because the cutting piece has a hammer, it is erected to avoid gravity pressure.