Patent ID: 8079790

Claim:
A tool in a tool holder, said tool holder having a cylindrical bore of a first diameter at a first predetermined temperature terminating in an outer abutment face, the tool holder configured to support a tool having a substantially cylindrical shank of a second diameter; said second diameter being sufficiently larger prior to assembly than said first diameter at said first predetermined temperature to then provide a shrink-fit between said tool and said tool holder in use; said tool further comprising a shoulder portion having a third diameter substantially larger than said second diameter of said shank; said shoulder portion of said tool being configured and disposed to abut said outer abutment face of said tool holder; said shoulder portion having a longitudinal length, along a common central axis of said tool, being configured and disposed to sufficiently maintain an axial force between said cylindrical shank of said tool and said cylindrical bore of said tool holder after assembly of the tool and tool holder, and to provide and maintain engagement between said shoulder portion and said outer abutment face during operation of said tool holder and said tool; said cylindrical shank of said tool being disposed in said cylindrical bore of said tool holder; said tool and said tool holder being configured to accept application of a sufficient axial force along said common central axis to introduce said cylindrical shank of said tool into engagement with said cylindrical bore of said tool holder during assembly; said tool and said tool holder being configured to accept a sufficient engaging force between said outer abutment face of said tool holder and said shoulder portion of said tool to provide and maintain a shrink-fit during use of said tool between said tool and said tool holder upon termination of the assembly of said tool and said tool holder; said tool holder and said tool being configured to change temperature to a second predetermined temperature, while maintaining said axial force between said tool and said cylindrical bore of said tool holder to provide a shrink-fit between said tool and said tool holder in use; said cylindrical shank of said tool has a central screw-threaded hole therein; and said axial force being applied by an arrangement comprising a removable draw bolt having one end that screws into said screw-threaded hole, wherein the tool holder, on the end thereof opposite the outer abutment face, terminates in a drawbolt abutment face, wherein the end of the drawbolt opposite said one end has a head having an abutment face that abuts the drawbolt abutment face.