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.