Ace Designers Ltd. Offers Index Tables with 8 or 12 Indexing Positions. Ace Designers Ltd. Is an ISO 9001:2000 certified company. The Index Tables with 8 or 12 Indexing Positions have been developed on the lines of our highly successful BTP series of turrets. The features of Index Tables with 8 or 12 Indexing Positions include three piece coupling, electrical operation and encoder fed back. The specifications of Index Tables with 8 or 12 Indexing Positions are +/- 2 inch repeat positioning accuracy and 0.5 second indexing time for 45 Degree.