Method and apparatus for cutting grooves in a bore

A method of forming one or more grooves in a bore-containing structure, said method comprising:

• rotating at least one of a first broaching tool and a bore-containing structure relative to one another about a first axis, said first broaching tool and said bore-containing structure aligned such that said first axis is an axis of said first broaching tool and an axis of a bore in said bore-containing structure, and moving said first broaching tool and said bore-containing structure relative to one another along said first axis;
• so that a cutting head of said first broaching tool cuts at least a first groove pattern in said bore-containing structure around said bore, said first groove pattern comprising at least a first circular helix relative to said first axis;
• said first broaching tool, comprising:
• a shank;
• a body;
• and
• said cutting head;
• said axis extending from a rearward end of said first broaching tool to a forward end of said first broaching tool through said shank, said body and said cutting head;
• said body is forward relative to said shank;
• said cutting head is forward relative to said body;
• said cutting head comprises at least a first rake face;
• said first rake face comprises a first cutting edge;
• said first cutting edge comprises a first corner at a forward end of said cutting head.