For over 64 years, Hi-Lo Manufacturing has produced reliable, efficient and economical Variable Speed Pulley Drives. Their innovative automatic belt tensioning design coordinates belt tension with load requirement and makes their Variable Speed Pulleys an industry favorite. Their comprehensive line of Variable Speed Pulley Drive products includes adjustable and fixed center distance pulley drives, asymmetric pulley drives, variable speed belts, sheaves, bushings, collets, and motor bases, hi-ratio compound drives, and custom machining. They also provide a wide range of precision custom maching production with its use of advanced robotics.