Tool holder-spindle connection

A first member defining a conical envelope for seating in a conical seat defined by a second member and an annular clamping surface in surrounding relation to the conical envelope for seating against an annular clamping seat defined by said second member in surrounding relation to said conical seat, characterized in that the conical envelope is resilient so as to allow simultaneous seating of the conical envelope in the conical seat and seating of the clamping surface on the clamping seat irrespective of the tolerances between the conical seat and the clamping seat, the resiliency of the conical envelope is provided by a plurality of spaced discrete resilient members defining spaced discrete resilient surfaces, the first member includes a central axial core and a conical shell fitted over the core, and the resilient members are positioned on the core by the shell.

A tool holder defining a conical envelope for seating in a conical seat defined by a spindle and an annular clamping surface in surrounding relation to the conical envelope for seating against an annular clamping seat defined by said spindle in surrounding relation to said conical seat, the conical envelope being resilient so as to allow simultaneous seating of the conical envelope in the conical seat and seating of the clamping surface on the clamping seat irrespective of the tolerances between the conical seat and the clamping seat, characterized in that the conical envelope is defined by a plurality of balls arrayed in a conical configuration and the conical envelope defined by the balls defines a conical angle matching the conical angle of the conical seat.

A tool holder defining a conical envelope for seating in a conical seat defined by a spindle and an annular clamping surface in surrounding relation to the conical envelope for seating against an annular clamping seat defined by said spindle in surrounding relation to said conical seat, characterized in that the conical envelope is resilient so as to allow simultaneous seating of the conical envelope in the conical seat and seating of the clamping surface on the clamping seat irrespective of the tolerances between the conical seat and the clamping seat, the resiliency of the conical envelope is provided by a plurality of spaced, discrete, resilient members defining spaced, discrete, resilient surfaces, the tool holder includes a central axial core and a conical shell fitted over the core, and the resilient members are positioned on the core by the shell.

A tool holder according to claim 9 wherein:

• the resilient surfaces are defined by at least two axially spaced annular rows of balls resiliently supported in surrounding concentric relation to the core.

A tool holder defining a conical envelope for seating in a conical seat defined by a spindle wherein the conical envelope is resilient and wherein the resiliency of the conical envelope is provided by a plurality of spaced, discrete, balls defining the conical envelope and arrayed substantially uniformly over the conical surface of the conical envelope.

A tool holder defining a conical envelope for seating in a conical seat defined by a spindle and an annular clamping surface in surrounding relation to the conical envelope for seating against an annular clamping seat defined by said spindle in surrounding relation to said conical seat, characterized in that the conical envelope is resilient so as to allow simultaneous seating of the conical envelope in the conical seat and seating of the clamping surface on the clamping seat irrespective of the tolerances between the conical seat and the clamping seat, the resiliency of the conical envelope is provided by a plurality of spaced, discrete, resilient members defining spaced, discrete, resilient surfaces, the resilient surfaces comprise a plurality of axially spaced annular resilient surface profiles, and each annular surface profile is discontinuous and is defined by a plurality of circumferentially spaced discrete, resilient surfaces.

A tool holder defining a conical envelope for seating in a conical seat defined by a spindle and an annular clamping surface in surrounding relation to the conical envelope for seating against an annular clamping seat defined by said spindle in surrounding relation to said conical seat, characterized in that the conical envelope is resilient so as to allow simultaneous seating of the conical envelope in the conical seat and seating of the clamping surface on the clamping seat irrespective of the tolerances between the conical seat and the clamping seat, the tool holder includes a conical core portion, the resilient conical envelope is defined by a plurality of balls positioned in spaced relation on the conical surface of the conical core portion, and the balls are held in position on the conical surface of the conical core portion by a conical cage member positioned over the conical core portion.