Abstract: A cable tie tool has a first operating unit, a second operating unit, a pivoting shaft, a torsion spring, a cutting assembly, and an extension spring. The second operating unit has two guiding holes aligned to each other. The pivoting shaft is mounted in the guiding holes, is pivotally connected the first and the second operating units, and is movable along the guiding holes. The torsion spring abuts against and pushes the first and the second operating units. The cutting assembly has an activating element pivotally connected to the second operating unit and a cutting element movably mounted in the second operating unit and driven by the activating element. The extension spring is connected between the activating element and the second operating unit. When the extension spring is stretched, the activating element blocks the pivoting shaft from moving along the guiding holes.

Abstract: A cable tie tensioning and severing tool includes: a cutting member, a pulling member with a pivotable pushing block abutting against the cutting member, a trigger with a stop block abutting against the pushing block, a pivotable pressing hammer, a turning knob, and an elastic member compressed between the pressing hammer and a spirally ramped end face of the turning knob such that the pressing hammer applies to the cutting member a pressing force whose magnitude can be adjusted by rotating the turning knob. The stop block can be driven by the trigger to push the pushing block, which in turn pulls a cable tie through the pulling member and, once the pressing force is overcome, pivots the cutting member to sever the cable tie.