The overall layout of processing needs to follow certain principles. What are the errors and wear in tool manufacturing? Please refer to the following description:

The dimensional accuracy of fixed size tools (such as drills, reamers, keyway milling cutters, circular broaches, etc.) directly affects the dimensional accuracy of the workpiece.

2. The shape accuracy of forming cutters (such as forming cutters, forming milling cutters, forming grinding wheels, etc.) directly affects the shape accuracy of the workpiece.

3. The shape error of the cutting tool (such as gear hobs, spline hobs, gear shapers, etc.) can affect the shape accuracy of the machined surface.

4. The manufacturing accuracy of general cutting tools (such as turning tools, boring cutters, and milling cutters) does not directly affect the machining accuracy, but they are prone to wear and tear.