UMA Engineering are manufacturers and suppliers of various L (3 / 8”) pitch timing pulley taper lock 3/8” pitch pulley for 1” wide belts. Ref. L100 in India. 14mm HTD taper lock timing pulleys are the most common type of pulley for taper bush for 1” wide belts. They are made of metal or dark grey cast iron. To protect the pulleys to the shafts, taper bushes are being used. The Taper bush not only locks the pulley to the shaft but also prevents axial displacement. When tried to compare to other sequences drives, minimum torque moves transmit significantly more energy, resulting in a more versatile shaft.