Rotary expansion tool

摘要: Apparatus for expanding the mouth of a hollow article, said apparatus comprising rotary expansion tool and holding pad reciprocable towards away from tool. The includes cage, plurality rolls held in equispaced relationship by cage around an inner race which holds rolling engagement with outer race. Means within cause to roll race, each having work portion, extending axial direction portions enter article pushed into therewith pad, expand distance determined length mandrel serves guide rolls. A sleeve shrouds working surface safety.