Raabe, NilsTheis, WinfriedWebber, OliverWeihs, Claus2005-10-122005-10-122005-10-12http://hdl.handle.net/2003/2164410.17877/DE290R-14492enBTA deep-hole drillingFinite element modelFrequency variationSpirallingStatistical method004Spiralling in BTA deep-hole drillingmodels of varying frequenciesreport