Vibratory Bowl Feeder manufacturers provide “tooling” on the tracks of the Bowl. As the components / parts go up the spiral, this “tooling” obstructs the movement of the components by making them change their flight path. This results in the components changing their orientation and moving ahead in the required orientation. It requires a good Bowl Tooler to design a good Bowl Feeder. A bad Bowl Tooler will provide you with the “tooling” but it will not be perfect with a “wrong” type passing thru’ every once in a while. Hence, it is pertinent that one buys Vibratory Bowl Feeders from the correct source / right company.