Abstract: An improved oscillating sling apparatus is disclosed for use in bar unscramblers. The oscillating sling comprises an endless chain with drive transmitting means for providing greater lineal speed of the chain at the forward or exit portion of the sling than at the rear portion. This is provided by supporting each sling chain upon sprocket wheels of equal diameter, the rear sprocket wheel shaft being at a higher elevation than the front sprocket wheel shaft. Oscillating motion is imparted to the sling by a reversible motor and speed reducer set connected with one shaft, the other shaft being coupled thereto by a drive chain and pair of sprocket wheels of a different diameter.