The work described in this paper was carried out in two parts. The first part consisted of evaluating the machining constants and the dynamic shear flow strengths of bovine bone from orthogonal cutting and drilling tests. The second part of the work arose from investigation into the thermal effects of drilling human bone during which certain trends were observed when comparing feed rate and point angle for fixed values of thrust. Some measure of agreement was found between these two independent pieces of work. Bera and Bhattacharrya's analytical equation for the thrust produced when drilling metals has been modified for anisotropic materials such as bone.
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