Cable tie application tool

A cable tie application tool is described that includes an electro-mechanical tensioning system. When the electro-mechanical tensioning system is controlled by a processor to tighten a cable, a reactionary force through a drive nut that is pivotally mounted to a tension bar can be monitored and measured by a strain gauge, a load cell, or other sensing system. This reactionary force is an indication of tension on the cable tie and is monitored by the processor until the tension reaches a predetermined tension, at which point, the processor causes a motor in the tensioning system to stop increasing the tension on the cable tie. The processor activates a cut-off system to cut the cable tie that has been tightened to the predetermined tension.