UMA Engineering is a leading manufacturers and suppliers of various timing pulleys. We offer a variety of, L (3 / 8”) pitch timing pulley taper lock 3/8” pitch pulley for 1/2” wide belts. Ref. L050. Every day, timing pitch taper lock are used in higher-performance applications. Grooved layout with 44 grooves for sequential rotation implementations. Ultra - light and highly corrosive clear made of aluminium metals 3 mm pitch profile to be used with 9 mm wide curvilinear tooth belts of the same pitch. A taper lock with a radius of 0.250" does not require the use of a bushing.