The calculation software is designed according to the latest state of the art mechanical transmission specifications which take into consideration the high quality standards of our pulleys allowing durability and the optimum tooth mesh between belt and pulley. Please consider that similar products, not manufactured by SIT, could invalidate calculations.This software does not cover all possible belt drive conditions. It is the responsibility of the belt drive system designer to ensure that SIT pulleys are appropriate for the application. In case of errors or application problems occurred by using this calculation software, SIT will not accept any responsibility and no claims will be accepted. The specifications and calculation formulas are constantly being developed and SIT reserve the right to change them without notice.