258 Каталог PRAMET 2016 Инструментальная оснастка для металлорежущих станков Стр.257

Каталог PRAMET 2016 Инструментальная оснастка Стр. 257 0258 Lab2u

HSK (hollow taper shanks) HSK-toolholders DIN 69893 The hollow taper shank (HSK) has become popular since its standardization as an interface between machine spindle and tool. HSK benefits to the user include: High static and dynamic rigidity High precision axial and radial reproducibility High tool change accuracy and repeatability High speed machining performance Short tool changing times Coding and identification Coolant feed Balancing recommendations and r.p.m. limits Pramet HSK-toolholders are generally pre-balanced to G 6.3/15,000 rev./min. Fine balancing on request is possible. Because the rotational speed is the largest influencing factor together with the limits regarding the spindle or spindle bearing interface, the following r.p.m. limits for HSK interfaces have been recommended as guidelines within the HSK standards: HSK-A 63 to 25,000 rev./min HSK-A 100 to 16,000 rev./min Depending on the tool, it may be necessary to balance both the tool holder and tool when applying the maximum r.p.m. Exact limits can only be determined if machine and spindle manufacturers are taken into consideration and it is possible to define tools and projecting lengths. / 257 MORSE VDI HSK-A DIN 2080 MAS 403 BT ISO 60 DIN 69871