Please choose the catalog you wish to consult "The selection of a speed reducer as shown in the following pages, considers a Service Factor (SF) = 1. The on-line selection procedure is intended as a suggestion only. The user should have some knowledge in the selection of speed reducers, their applications and correct mounting practices. Although there are some restrictions in the selection program to avoid impossible or impractical selections, the final selection is the sole responsibilty of the user. Speed reducers selected through this procedure, are suggestions only. The user should take in consideration all factors that can influence the performance of a speed reducer and apply the proper Service Factor."