Patent ID: 7938047

Claim:
A rotary milling head for preparing a tube end comprising, a milling head body with a first side and a second side adapted to be connected to a means of rotation, a plurality of axially extending cutting piece supports attached to the first side of the milling head body, each cutting piece support having a face, sides and a back, each cutting piece support further having a hole in its face with walls, said walls having first the shape of a truncated conical section with a large end and a small end, the large end being closer to the face, and then a generally cylindrical shape continuing through a side or the back of the cutting piece support, and a plurality of cutting pieces, each cutting piece comprising a cutting blade with a first side being the cutting face and a second side attached to a cutting piece body in the shape of a truncated conical section of approximately the same size and shape as the walls of a hole in a cutting piece support, such that the cutting piece is removably secured in the hole by forces exerted on it by material being cut and friction between the cutting piece body and the walls of the hole without any other securing means.