Trolley conveyor has a series of trolleys supported from or within an overhead track. In this conveyor Trolleys are equally spaced in a closed loop path and are suspended from a chain. The number of carriers and trolleys are equal. There is a equal series of carriers. Here carriers are used to carry multiple units of product. The trolley conveyors does not provide for any accumulation. They are most commonly used in processing, assembly, packaging, and storage operations. The trolleys and the load carriers are equally spaced with an overhead track. There are two primary types of trolley conveyor. The simplest consists of equally spaced trolleys simply connected by a single endless chain or a cable. This type of conveyor has relatively low maintenance, low cost and can change directions both vertically and horizontally with relative ease.