Crimping head for impact wrench

A method of crimping a fitting onto a structure carrying the fitting;

• and comprising the steps of:
• (a) providing crimping head for use with an impact wrench to crimp fittings onto a structure carrying the fitting, comprising:
• a universal adaptor having a head, and a socket positioned in the head sized and shaped to receive a standard anvil of an impact wrench without further connection between the impact wrench and the crimping head;
• (ii) a locking assembly cooperating with the universal adaptor head for locking the anvil into the socket;
• (iii) a transmission attached to the universal adaptor for being driven by the universal adaptor and for converting rotational movement of the anvil into selective rearward and forward movement;
• and
• (iv) a jaw assembly attached to the transmission and adapted to close into a crimping position and open into a release position responsive to the rearward and forward movement of the transmission;
• and
• (b) activating the impact wrench to drive the jaw assembly into a crimping position.