5th. Upon the distance the tool edge is required to stand out from the tool clamp, or part that supports it.
Lathe tools are designated either from the nature of their duty, or from some characteristic peculiar to the tool itself.
The term “diamond point” is given because the face of the tool is diamond shaped; but in England and in some practice in the United States the same tool is termed a front tool, because it is employed on the front of external work.
A side tool is one intended for use on the side faces of the work, as the side of a collar or the face of a face plate. An outside tool is one for use on external surfaces, and an inside one for internal, as the walls or bores of holes, &c.
A spring tool is formed to spring or yield to excessive pressure rather than dig or jump into the work.
A boring tool is one used for boring purposes.
Fig. 916.