HTD pulleys have a different design from the traditional toothed pulleys. The axial grooves are designed to allow the beltteeth to catch the pulley teeth with negligible triction. HTD Pulleys are available with full hub and for assembly with SER-SIT taper bushing.
SIT-LOCK® locking assembly unit consists of four pieces with two inside double-one rings joined through a set of tightening screws. It is recomended for medium torques. Although it is not self centering, it can be easily assembled and diassembled.
Here are the dimensions of product :
Inner Diameter : refer to numbers writen after "F" in every product name. For example, CAL1F20/47; so, the inner diameter is 20 mm.
Outside Diameter : refer to the last number in every product name. For example, CAL1F20/47; so, the outside diameter is 47 mm.