Abstract: Apparatus for applying closures to containers includes a plurality of cam followers, closure tightening mechanisms associated with the cam followers to tighten closures on the container, a cam assembly having an annular cam groove for receiving the cam followers, and a cam insert positioned along a portion of the length of the cam assembly The cam insert is moveable between a first position and a second position to change the path of the cam followers between a first path and a second path, where the first path causes the cam followers to move relative to the cam assembly at a first rate, thereby causing the closure tighteners to tighten closures on the containers at a first rate, and the second path causes the cam followers to move relative to the cam assembly at a second rate, thereby causing the closure tighteners to tighten closures on the containers at a second rate.