By John G. Proven, P.E., Nuttall Gear
As a manufacturer of engineered enclosed drives, Nuttall Gear is accustomed to variances in specification requirements depending on the industry and the function of the gearbox. The duty cycle of these units can vary significantly from heavy shock load on a coal crusher where the service factor can exceed 2.0 to a coiler in a steel mill that can have a service factor of 1.0.
AGMA, the American Gear Manufacturer’s Association, has established service factor guidelines for many of the applications. Most of the movable bridge applications call for a 1.5 service factor. Based on the expected duty cycle and the typical operation of the reducer, the application of the service factor will ensure a durable gearbox with an expected long life. Read Article




