
22 Fundamentals of Machining Processes
2.2.2 Tool Angles in Orthogonal System of Planes
This system of planes and angles refers to the cutting tools that are used
in the machining operation. The tool reference planes are three mutually
perpendicular ones as shown in Figure 2.8.
Base plane: Horizontal plane containing the base of the tool
Cutting plane 1: Contains the main cutting edge, perpendicular to the
base plane
Orthogonal plane 2: Perpendicular to the base plane and the cutting plane
This set of reference planes is called the orthogonal system of planes.
Figure 2.9 shows the different angles described by the orthogonal system.
Table 2.2 shows ...