Davies, LaurieTheis, WinfriedWeihs, Claus2005-10-112005-10-112005-10-11http://hdl.handle.net/2003/2164010.17877/DE290R-14482Two models are proposed to roughly approximate the observed behaviour of the amplitude of the drilling torque in in the BTA-deep-hole-drilling process. It is shown that these models are closely connected.enBTA-deep-hole-drilling process004Two connected models for varying amplitudes in BTA-deep-hole-drillingreport