Abstract： ASME B5.50:2015 pdf download.7/24 Taper Tool to Spindle Connection for Automatic Tool Change. 1.4 Definitions automatic tool changer (ATC): mechanism for the transfer of the toolholder between a storage feature and the spindle or nonrotatin...

ASME B5.50:2015 pdf download.7/24 Taper Tool to Spindle Connection for Automatic Tool Change.

1.4 Definitions

automatic tool changer (ATC): mechanism for the transfer of the toolholder between a storage feature and the spindle or nonrotating socket.

balance: when the mass centerline and rotational centerline of a rotor are coincident.

basic cone: geometrically ideal conical surface that is given by its geometrical dimensions. These are a basic cone diameter, the

basic cone length, and the basic rate of taper, or the basic cone angle.

basic toolholder shank: unit that fits directly into the spindle or nonrotating socket of the machine and has provision for

automatic tool change.

coolant hole: passage through the center of the retention knob that allows through-the-spindle coolant to pass. This hole also

permits access to a tool set height adjustment screw if so equipped.

drire key: device intended to assist in delivery of the driving torque from the spindle nose to the tool. effective case: depth

within a metal part, measured from the part’s surface, where the minimum required hardness is present.

retention knob: member of the toolholder retention system that provides a coupling point between the tool- holder taper and the

spindle drawbar.

spindle: component assembly of the machine tool, the function of which is to accept the basic toolholder shank. spindle nose: the

part of a spindle into which the tool shank is accepted.

tool angular orientation: mechanical feature to position and retain the basic toolholder shank in a specific angular relationship

to the spindle or nonrotating socket. tool shank: the part of a tool that mates with the taper in the spindle nose.

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