I think this problem seems complicated, but it is actually easy. The following will introduce two aspects: 1. Finishing hobs. The main representative type of cutting tools is carbide gear scraping hobs. Observe the performance of the cutting tools. The wear condition of the blade can be found. When processing gears with a large number of teeth, the wear length is long. When processing gears with a small number of teeth, the wear length on the blade is short. You can use a caliper to measure the wear length. If the wear length is It accounts for 1/3 of the total blade length. It can be seen clearly that the length of the string blade is 1/3 of the axial tooth pitch, and so on. 2. The rough machining of tools with soft tooth surfaces is also based on the wear length of the blade. However, the wear length is based on observing how many hobs are worn in the same row. If the number of worn tool teeth is 4 teeth, a shaft is required. It needs to be transmitted to 4 tooth pitches. At this point, I won’t explain the other reasons. I think Mr. can also understand. View original post >>