TY JOUR TI RADIAL STIFFNESS ANISOTROPY OF BODY BORING FOR LATHE SPINDLE BEARINGS KW anisotropy KW stiffness KW body KW deformation KW bearing KW spindle unit JO Bulletin of Bryansk state technical university AU Denisenko, A.F. AU Yakimov, M.V. AU Borisova, K.R. PY 2021 IS 2021 PB Bryansk State Technical University