Timing belts, V-belts, and power bands are commonly used in industry as a means of power transmission. Timing, or synchronous belts, are used when the speed ratio is critical. Timing belts are commonly flat, made of rubber or urethane, and have teeth located along their peripheral. The teeth help to ensure that the belt does not slip and that the timing is accurate. V-belts are used when the speed ratio is insignificant. Tapered sides on the belt use friction to turn a pulley and transfer motion. Power bands are commonly used to keep a belt aligned on a pulley. If a pulley has a tendency to vibrate, a standard belt could twist or flip causing it to wear and break. A power band utilizes multiple tracks to align the belt and keep it in position. Important parameters for a belt include maximum operating speed, cross sectional area, operating temperature, and ultimate tensile strength.

• Timing Belts
• V Belts