 Terog Manufacturing Company in Stephen is dedicated to providing you with reliable and innovative power transmission products under their brand name, Black Ace. Black Ace products include sprockets, torque limiters, idler wheel rollers, chain tensioners, steel pillow blocks, and the bolt-pull articulating implement hitch. Your drives deserve the best components in the industry. Black Ace products from Terog Manufacturing Company serving you with the highest level of expert craftsmanship, customer satisfaction, and service. Proud to be sponsors of Stephen Argyle Sports. Terog Manufacturing Company in Stephen.