Installation tool for a blind fastener and installation procedure for a fastener

An installation tool for a fastener in a structure via a front face of said structure, said fastener being of the type including a pin comprising a shank with a head and a threaded end, a gripping element that can be fractured with the application of a predetermined fracture torque and a threaded sleeve capable of becoming deformed outwardly to form a bulb against a rear face of said structure:

• a hollow cylindrical body extending along a longitudinal X axis comprising a first end in front of an axial opening allowing feedthrough of the gripping element and the fastener head,
• a first sleeve movable axially and rotationally in the body, capable of driving the gripping element of the pin in axial translation and in rotation about the X axis;
• a second sleeve movable axially in the body and immovable in rotation, said second sleeve being arranged to drive the first sleeve in axial translation;
• means for rotation about the X axis comprising a turning shaft provided:
• with a first free wheel that can drive the first sleeve in rotation in a first rotation direction of the shaft, and
• with a second free wheel that can rotate a driving element positioned coaxially around said second free wheel in a second rotation direction of the shaft, opposite to the first rotation direction, with the driving element cooperating via helical link with the second sleeve so as to move said second sleeve in axial translation.