SHB Manufacture Timing Pulley Hobs in Class ‘A’ and Class ‘AA’ accuracies for timing pulleys with straight sided or involute teeth for Rubber Timing Belt Pulleys, Polyurethane Metric Timing Belt Pulleys, HTD and STD profiles. The Hobs can be supplied in pitches ranging from 2.032 mm or 1/5” to 20 mm or 1¼.