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ASME B5.50-2009 pdf free

ASME B5.50-2009 pdf free.7 /24 Taper Tool to Spindle Connection for Automatic Tool Change.
ASME B5.50 pertains to the standardization of basic toolholder shank, retention knob, and socket assemblies for numerically controlled machining centers with automatic tool changers. The requirements contained herein are intended to provide toolholder interchangeability between machining centers with automatic tool changers of various types. This Standard is the inch solution for basic toolholder shank, retention knob, and socket assemblies. This design specifies an interchangeable retention knob with a 45-deg clamping surface.
Section 2 of this Standard specifies the dimensions and tolerances of toolholder shanks having 7/24 tapers intended for automatic tool change. These are intended for use with the corresponding basic retention knob and spindle sockets specified in sections 3 and 4 (see Table 1).
Section 3 contains information for standardization of retention knobs for use with the 7/24 connection system described herein (see Table 2).
Section 4 specifies the dimensions and tolerances of spindle sockets, drive keys, and key seats for machine tool spindles having 7/24 tapers intended for automatic tool change (see Table 3 and Fig. 1). These are intended for use with the corresponding basic toolholder shank and retention knob specified in sections 2 and 3.
1.2 Noninterchangeablllty
Tool shanks conforming to ASME B5.18-1972 and ASME B5.40-1977 are not interchangeable with tool shanks established in this Standard. Tool shanks conforming to ISO 7388-1:1983 and retention knob ISO 7388-2:1984 types “A” and “8” are not interchangeable with this Standard. This also applies to additional shank and knob designs that are in the draft stages within the ISO standards development system. Accordingly, the reader should note the warning statement included with the retention knob specifications shown in Table 2.
Some incompatibility with existing automatic tool change arms may arise from dimension M (Table 1).
1.3 CLassification
This Standard covers a basic toolholder shank with an “inch” threaded retention knob with 45-deg clamping surface that is applicable to general-purpose machining centers where loading and exchange of toolholders is accomplished by automatic means. The term ce?icraJ purpose is intended to differentiate between machine designs for unusually high accuracy requirements or designs intended to function with exceptionally high spindle rotational speeds coupled with higher axis feed rates, such as is normally found in high-speed machining. Tool shanks made to this Standard may be used with a variety of proprietary retention and/or flange locking systems.
L4 Definitions
Terms relevant to this Standard and its application are as follows:
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 Ioolholder shank: unit that fits directly into the spindle or nonrotating socket of the machine and has provision for automatic tool change.
coolant hok: 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 adjust. ment screw if so equipped.
drive key: device intended to assist in delivery of the driving torque from the spindle nose to the tool.
tffeclivt’ 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.ASME B5.50 pdf free download.

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