Abstract: A mail sortation system includes a frame system, a conveyor carried by the frame system, a driven axle on one end of the conveyor, a pair of split idler axles, one idler axel on each side of the conveyor, a chain from each idler axel to the driven axel, and a chain slack adjustment mechanism. The idler axels are configured to rotate independently of each other. The chains are coupled to the conveyor, such that rotation of the driven axle causes the idler axles to rotate and the conveyor to translate. The chain slack adjustment mechanisms remove slack in each chain by increasing the distance between the driven axle and the idler axles.