Overview Product Description 40 Series Driven Pulley, made in the USA by Comet. 7 5/8" diameter with a 3/4" center bore. Used with 40 series 7/8" wide belt. Mounts inboard. 3/16" Keyway Product Videos Custom Field Product Reviews Write a Review Write a Review × 40 Series Driven 3/4" Bore, Comet Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *