geometric design and strength check of spur gear with straight and helical toothing. application is developed in ms excel, is multi-language and supports imperial and metric units and solves the following main tasks: - calculation of helical and straight toothing (external). - automatic design of a transmission with the minimum number of input requirements. - design for entered coefficients of safety (static, dynamic). - calculation of complete geometric parameters (including corrected toothing). - optimization of toothing by use of proper correction (balancing specific slips, miminizing specific slips, strength...). - calculation of strength parameters, safety check. - design of gearing for exact axis distance. - supplementary calculations (calculation of parameters of the existing gear, temperature rise, design of shafts, check dimensions). - support of 2d and 3d cad systems. - drawings of an accurate tooth shape including data (x,y coordinates). - 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 calculations use procedures, algorithms and data from standards ansi, iso, din, bs and specialized literature. used standards: iso 6336, iso 1328, din 3990, ansi b6.1-1968, agma 2001-c95, agma 2001-d04, agma 908-b89/95 and others.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