Prep Bit

A rotary bit configured to deburr and swage an end of a tube, comprising:

• a cylindrical body having a swaging end configured to deburr and swage the end of the tube, a connection end configured to be secured to a rotary device, and a coupling section between and connecting the swaging end and the connection end;
• a plurality of blades that extend axially along the swaging end and radially outward from the cylindrical body, the plurality of blades including a plurality of leading blades and a plurality of finishing blades, the leading blades configured to initially deburr and swage the end of the tube upon insertion of the rotary bit into the end of the tube, and the finishing blades configured to complete deburring and swaging of the end of the tube, the finishing blades extending radially outward from the cylindrical body to a greater extent than the leading blades;
• and
• a finishing collar configured to be secured to the coupling section, the finishing collar defining a shoulder configured for receipt of the end of the tube when the rotary bit is inserted into the end of the tube, and the shoulder is configured to deburr the end of the tube.

A method of attaching a tube to a fitting, comprising:

• cutting the tube from a stock length of tube;
• inserting and energizing a rotary bit into an end of the tube that was cut from the stock length of tube;
• and
• attaching and securing the tube to the fitting,
• wherein the rotary bit includes a first end configured to deburr and swage the end of the tube, and a second end configured to be secured to a rotary device that is configured to energize the rotary bit, the first end including a plurality of blades that extend axially along the first end and radially outward from the rotary bit, the plurality of blades including a plurality of leading blades and a plurality of finishing blades, the leading blades configured to initially deburr and swage the end of the tube upon insertion of the rotary bit into the end of the tube, and the finishing blades configured to complete deburring and swaging of the end of the tube, the finishing blades extending radially outward from the rotary bit to a greater extent than the leading blades.