A method and apparatus for changing pallets delivered to a machining center. Different workpieces are connected or attached to different pallets. A first workpiece corresponding to a first pallet is delivered to or near an indexer or indexer assembly and the indexer is moved into an engaged position and performs a work operation on the first workpiece. The indexer is then moved to a disengaged position and the first pallet and the first workpiece are exchanged or switched out with a second pallet having a second workpiece. The indexer is then moved to an engaged position and works the second workpiece and when completed, the indexer moves to the disengaged position and the second workpiece is exchanged or switched out with a third pallet having a third workpiece. The indexer system of this invention can quickly and cost-effectively cycle through different pallets and thus different workpieces.