Dynamic Conveyor, Muskegon, Mich., recently improved the design of its tumbler parts separator to offer greater durabilitwww.dynamicconveyor.comy at a lower price. Solid one-piece rings on the rotating drum cage replace the previous 12-segmented ring construction. The one-piece ring reportedly will last a lifetime without repairs, unlike the segmented ring. One-piece construction also provides very smooth, quiet rotation of the drum cage. In addition, the time needed to manufacture one-piece rings is much less, allowing for shorter delivery times and a lower price for the unit.