Timing belts, also referred to as gear belts or synchronous belts, drive precision equipment with a pattern of teeth that mate to compatible timing belt pulleys or idlers. Trapezoidal timing belts have trapezoidal teeth that deliver low to moderate amounts of torque. HTD (curvilinear) timing belts have a round tooth profile to increase contact surface area and dampen stresses. GT (modified curvilinear) timing belts have a steep round tooth profile to increase contact pressure and surface area while reducing backlash. Urethane carbon timing belts rugged and heavy-duty replacements for high torque chain drives. SilentSync timing belts have a double helical tooth pattern to provide low noise and low vibration