How to solve the problem that the A4 paper cutter fuse is easy to break

In the cutting process of the A4 paper cutter, sometimes the safety screw is often broken. This is mainly due to the following reasons:
1. The cutting edge of the blade is not sharp enough;
2. The left and right sliders of the knife holder have been worn;
3. The safety screw is not tightened frequently; the safety screw is not in the correct direction during installation;
4. If the safety pin has not yet withdrawn and the knife has fallen and hit the safety bolt;
5. The two end faces connecting the safety screw are not flat enough due to deformation, etc .;
6. The blade is cut too deep into the blade or because the blade is not ground flat enough, adjust the blade too deep in order to cut the paper completely;
There will also be failures due to electrical reasons.
Through the above content, I believe that everyone has a certain understanding of the failure of the A4 paper cutter, and can solve these problems in a timely manner.