Abstract: A surface finishing vibratory apparatus and method for using such to simultaneously surface finish a plurality of elongated parts with loose particulate finishing media. The apparatus includes a single tub having a plurality of transversely disposed longitudinally extending troughs wherein the troughs are isolated from each other such that finishing media and the workpieces placed in each trough cannot move to another trough during the surface finishing process. The troughs mat use fixed or removable compartment walls that divide one or more of the troughs into separate isolated compartments to use for shorter workpieces.

Abstract: A vibrating finishing apparatus including an annular tub mounted upon a spring support is disclosed. A drive shaft extends upwardly through the center opening of the tub and is interconnected to the inner wall of the tub. A reversible motor selectively rotates the shaft in either of two directions. The shaft carries a lower eccentric weight and an upper eccentric weight assembly which are offset to create a vibratory movement. The upper weight assembly automatically shifts the angular offset between its center of gravity and that of the lower eccentric weight when the direction of shaft rotation is changed. The upper weight assembly includes a cylindrical housing with two internal baffles at an angle to one another defining a weight chamber partially filled with steel ball weights.