Method and apparatus for forming internal recesses in a hollow body

摘要

Apparatus for forming a recess in an internal surface of an elongated hollow body comprised of a housing having a rotary mill and means for rigidly clamping the housing at a desired position within the interior of the body attached thereto. Means operable from the exterior of the body are provided for clamping the housing within the interior of the body and selectively moving the mill into contact wth an interior surface of the body whereby a recess is formed therein.