Timing pulleys prevent misalignment and ensure smooth power transfer between the pulley and belt. The pulley has teeth and pockets on the outer surface its body. These teeth and pockets mate with a timing belt with the same pitch to make synchronous drive. The design also provides a higher torque carrying capacity and allows the drive to operate with lower noise and vibration than conventional pulley and belt drives. These drives combine the advantages of chain and gear drives with the advantages of belted drives, without the belt drive limitations.