# of Flanges: Describes the number of flanges on a pulley. Most will have two flanges, to keep the belt from slipping, but some operations work best without any flanges.
# of Set Screw holes: Describes the number of set screw holes on a pulley. Set screws are used to hold a pulley in place on a shaft, but they are not required if the operation includes a keyway.
# of Teeth: Describes the number of teeth on the sprocket or timing pulley.
Belt Width: The width of the belt used. V-belt width is taken from the widest point.
Finish: The finishing material used to prevent rusting in steel or cast iron. Zinc Plating and powder coat provide the longest rust prevention.
Inside Diameter: The distance across the center hole, or bore, of the product.
Material: Describes what the product is made from. Plastic, aluminum, and diecast are softer than steel and cast iron.
Pitch Diameter: The diameter of the pitch used in the pulley. This is determined by the profile type.
Profile: The name of the combined pitch and tooth configuration in timing pulleys.
Stock Length: The useable length for timing pulley stock.