Обший каталог Yamawa 2016 - 2017 - страница 845

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23. Selecting different tap holder combinations by machine feed system Holders aspects Characteristics of tap self-guiding behavior Description of products r=tap’s radius, s=thread relief, t=margin width Eccentric thread relief (no width of margin) Compression Tension Spring direction Completely rigid holder type Tap characteristics ; high cutting performance and machin- ing performance, with little to no self-guiding features. The tap is held with no axial or radial Operation ; A fully synchronous machining system with fixed adjustment in the collet and holder. rigid holder is needed. Example : "High speed tapping" and "fully synchronous tapping." Con-eccentric thread relief (margin and thread relief) Adjustable spring floating holder (Tension & Compression) Tap ; High level of self-guidance due to suitable tap diameter margin and thread relief. The combination of nice portion of Machine feed and tap's thread lead margin and chamfer relief helps to make appropriate tap guidance. errors are corrected by two types of spring system in the holder, the axial tension direction of the tap and the Concentric (No relief) axial compression direction of the tap. Tap ; A full thread land stays in contact with the thread major Information Technical diameter at all times. Tap has no thread relief on major diameter, creating a high level of self-guidance even with unbalanced feeding conditions. Technical-70 841