|4559803||Tool for making hollow articles|
A tool, and method, for making the outer member of a constant velocity universal joint of the cross-groove type, the outer member being of hollow form having in its interior two sets of helical grooves of opposite hand. The tool comprises first and second...
|4411569||Apparatus for broaching rifling|
A method for broaching a gain twist rifling in a gun barrel comprises cutg the initial tracking groove in the gun barrel, and thereafter passing a plurality of freely rotatable cutter assemblies disposed in spaced apart communication with each other, so ...