This document contains technical specifications and part numbers for a sheave clutch model 304. It lists keyway bore sizes from 1/2" to 7/8", the model weight of 5.3 lbs, and maximum torque of 264 in-lbs at 3600 RPM for a 90V unit. It also provides part numbers for ordering the sheave clutch in different voltage and bore configurations. An exploded view diagram shows the numbered replacement parts for the sheave clutch.