Difference between round and countersink
1. Normally, circular hole processing is simple, and waist hole processing is complicated.
2. When the machine is assembled, the mutual position between some parts is difficult to reach the ideal position or the position between parts needs to be adjusted, usually a waist-shaped hole design is used. As for the positioning and fastening of the waist hole, it is also simple, as long as a flat washer that meets the requirements is installed.