the calculation is designed for geometrical design and complex strength check of shafts. application is developed in ms excel, is multi-language, supports imperial and metric units and solves the following main tasks: - simple definition of installed shafts, including hollow ones. - options of definitions of necking-down, recesses, grooves and calculation of the relevant coefficients of stress concentration. - simple definition of spatial shaft load. - calculation of reactions, courses of forces, moments, stress, deflection and bending angle of the shaft and others. - calculation of critical speed and safety coefficients. - support of 2d cad (autocad, autocad lt, intellicad, ashlar graphite, turbocad) and 3d cad in full calculation package (autodesk inventor, solidworks, solidedge, pro/e). the calculation is based on data, procedures, algorithms and data from specialized literature and standards agma, iso, din and bs. list of standards (din 743).this module is a part of mitcalc - mechanical and technical calculation package for gear, belt and chain drives, springs, beam, shaft, bolt connection, shaft connection, tolerances and many others.