For the calculation of worm wheels and crossed helical gears, fine sizing modules are now available (module ZD5 and ZE6). The KISSsoft fine sizing is applied to gear optimizations of all kinds — from static strength to noise optimization. Thereby, the macro geometry is varied in desired areas and the optimal solution according to various criteria is selected from the calculated variants. Plastic helical gears can be directly calculated according to the new draft of VDI 2736. After the cylindrical and bevel gears, these fine sizing modules complete the sizing process for all teeth.