Polyurethane timing belts it's commonly defined "clean drive" as offer the advantage of not producing dust. Further more, they are resistant to oils and chemicals agents. It's mostly used where dust is not acceptable, (e.g. medical application, food industry). They also offer accuracy in positioning for high precision drives application. Moreover the possibility of adding special layers and/or different kind of toppings, to weld it at whatever length, makes it unique for transportation applications replacing chain drives with many advantages. SIT pulleys for PU drives, are designed and produced to satisfy every industry need such as precise positioning (zero backlash) and guarantee optimal drive performances and longest belt life.