BS ISO 26623-1:2014 pdf free
BS ISO 26623-1:2014 pdf free.Polygonal taper interface with flange contact surface
This part of ISO 26623 specifies dimensions for polygonal taper interfaces with flange contact surface一polygon-shanks for automatic and manual tool exchange to be applied on machine tools (e. g. turning machines, drilling machines, milling machines, and turn/milling centres, as well as grinding machines). A range of shank sizes is specified.
These shanks incorporate a grooved flange to enable automatic tool exchange. The clamping can be realized by a circular groove using clamping segments or internal screw threads using centre-bolts.
The torque is transmitted by form lock (polygon)
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 965-2, ISO general purpose metric screw threads一Tolerances 一Part 2: Limits of sizes for general purpose external and internal screw threads一Medium quality
ISO 2768-1, General tolerances一Part 1: Tolerances for linear and angular dimensions without individual tolerance indications
ISO 2768-2, General tolerances一Part 2: Geometrical tolerances for features without individual tolerance indications
3 Dimensions
3.1 General
Tolerances for linear dimensions for features without individual tolerance indications shall be of tolerance class “m”in accordance with ISO 2768-1 and geometrical tolerances for features without individual tolerance indications shall be of tolerance class”K” in accordance with ISO 2768-2.
Tolerances for threads where tolerance is not stated shall be in accordance with ISO 965-2.
3.2 Polygon-shanks
The dimensions of polygon-shanks shall be as specified in Figure 1 and Figure 2 and in Table 1.
NOTE Additional dimensions as in use for stationary tools are given in Annex A. Additional recommendations for use and application, (i.e. balancing with a particular design for size 100), are given in Annex B.
Variations of taper shank and receiver size within the specified limits of tolerance will cause the portion of the clamping force acting on the flange surface to vary. However, the clamping forces given in Table A.1 will ensure that the portion of acting on the flange surface is never less than 80 % of the total. The flange contact is decisive for the stiffness of the polygonal taper interface.BS ISO 26623-1 pdf download.
