Abstract: In a spindle assembly for machine tools, the axial length ? of the collar of a spring collet is determined as a function of the axial course length c of a clamping sleeve operating spring collet. This axial length ? is preferably retained within an interval ranging between 3 mm and 9 mm. A tapering surface of the collar presents an inclined profile, which is straight, curved, or at least partially curved. The angle of inclination formed by the tapering surface with the axis of the spring collet is advantageously of the order of 45°. The spring collet has at least two grooves. The gap between these grooves may be determined in such a way that, when the spring collet is in the closed position, then the workpiece is gripped with a predetermined clamping force, and the two mutually opposing faces of each groove portion abut against each other.

Abstract: In a spindle assembly for machine tools, the axial length ? of the collar of a spring collet is determined as a function of the axial course length c of a clamping sleeve operating spring collet. This axial length ? is preferably retained within an interval ranging between 3 mm and 9 mm. A tapering surface of the collar presents an inclined profile, which is straight, curved, or at least partially curved. The angle of inclination formed by the tapering surface with the axis of the spring collet is advantageously of the order of 45°. The spring collet has grooves, the number whereof is at least two, but also greater than three. The gap between these grooves may be determined in such a way that, when the spring collet is in the closed position, then the workpiece is gripped with a predetermined clamping force, and the two mutually opposing faces of each groove portion abut against each other.

Abstract: A mouthpiece for a musical wind instrument. The mouthpiece has a casing and a reed attachment assembly mounted in a recess at the top of the casing. The reed attachment assembly has a bridge member pivotably connected to a frame. The foot of the reed is clampable against a plate portion of the pivotable bridge member such that the blade of the reed protrudes from the attachment assembly and extends above the top surface of the casing with the tip of the reed being disposed proximate the leading edge of the casing. An adjustment is provided for adjusting the inclination of the plate of the pivotable bridge member relative to the frame such that the distance between the tip of the reed and the leading edge of the mouthpiece casing can be adjustably varied.