Geared motors

Drive dimensioningDimensioningThermal power limitThe permissible gearbox continuous power is restricted by:˘ The mechanical rating, defined by the material strengthof the individual components or˘ The thermal power limit, defined by the heat balance.The thermal power limit may be lower than the mechanicalrating indicated in the selection tables.The thermal power limit is determined by:˘ Losses in the lubricant. These are determined by themounting position and the circumferential speed of thegears.˘ The load and the speed˘ The ambient conditions: Temperature, air circulation,heat input or dissipation via shafts and thesubstructure.2Please contact Lenze˘ If you are using the following gearbox model, size andratio combinations at input speed n 1 > 1500 rpm:Gearbox model Gearbox sizes Ratiosi