Cutting tool, which is driven with its shaft so that it rotates about its longitudinal axis or in a pushing and pulling manner, and wherein further shaft-side secondary cutting tools are fastened to the shaft, wherein the secondary cutting tools are fastened to the shaft of the cutting tool in an exchangeable manner.

A cylindrical cutting tool for processing splines formed on an outer circumference of a shaft member to extend in an axial direction includes blade portions which are formed in a spline shape on an inner circumference. The blade portions include: a first blade portion which is formed in a terminal end portion in a first direction along the axial direction and which is directed substantially toward the first direction; and a second blade portion which is formed in a terminal end portion in a second direction along the axial direction and opposite to the first direction and which is directed substantially toward the second direction.

A cutting tool assembly for use in controlled fracture machining includes a body having a rectilinear shape with a top end and bottom end and a tool holder attached to the bottom end of the body. A first cutting tool is configured at one lower end of the tool holder is to operate the tool in a forward direction of movement while a second cutting tool is configured at the opposite end of the tool holder to operate in a reverse direction of movement. The tool is shaped so an upper portion of the tool holder has a first diameter and the lower portion of the tool holder has a second diameter. The first diameter can smaller or larger than the second diameter depending on the size and type of workpiece and shape needed to produced.

A cutting tool assembly for use in controlled fracture machining includes a body having a rectilinear shape with a top end and bottom end and a tool holder attached to the bottom end of the body. A first cutting tool is configured at one lower end of the tool holder is to operate the tool in a forward direction of movement while a second cutting tool is configured at the opposite end of the tool holder to operate in a reverse direction of movement. The tool is shaped so an upper portion of the tool holder has a first diameter and the lower portion of the tool holder has a second diameter. The first diameter can smaller or larger than the second diameter depending on the size and type of workpiece and shape needed to produced.