discharge for all bucket elevators at all speeds shown within speed range. Note Low-Profile Elevator Buckets spaced on minimum centers may require faster minimum speeds than shown on this chart. The optimum speeds shown are based on free flowing whole grains. The maximum recommended speed for feed ingredients and other similar Bucket elevators are sometimes referred to as conveyor buckets, most often when the movement is horizontal or on an incline. However, technically speaking, vertical movement is also accomplished with a conveyor belt or chain. The centrifugal discharge bucket elevator is perhaps the most common type.