1. Before using the toothless saw, carefully check whether the parts are loose and whether the saw blade is broken or cracked;
2. The safety shield of the toothless saw must be firm and reliable;
3. When using a toothless saw, a leakage protector must be used;
4. When the toothless saw is not in use, cut off the power supply in time;

With the development of modern machinery industry, for cutting the quality and continuously improve the accuracy requirements, to improve production efficiency, reduce production costs, with automatic cut-off function of the requirements of high intelligence is also improved. Development of the cutter bar must be adapted to the requirements of modern machinery industry development. Bar cutting machines, a lot of species can be divided into round cutting, plasma cutting, laser cutting and so on. Among the fastest laser cutting efficiency, highest precision cutting, cutting thickness is generally small. The plasma cutting cutting speed quickly, but there is a certain slope cutting surface.