# 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. The rare product with only 1 flange is recommended for Genuine OEM replacement only.
# of Set Screw holes: Describes the number of set screw holes on a drive pulley. Set screws are used to hold a pulley in place on a shaft, but they are not necessary if the operation includes a keyway.
# of Teeth: Describes the number of teeth on the sprocket or timing pulley.
Inside Diameter: The distance across the center hole, or bore, of the product. This dimension should match the diameter of your shaft or bolt.
Material: Describes what the product is made from. Plastic, aluminum, and diecast are softer, lighter, and do not rust. Steel and cast iron are meant for heavy-duty applications, but can rust in certain circumstances.
Pitch Diameter: The diameter of the pitch used in the timing pulley. This is determined by the profile type.
Profile: The name of the combined pitch and tooth configuration in timing pulleys. For example, "3M HTD" has a curvilinear tooth shape, and a pitch of 3 millimeters. "Pitch" is the distance between the centers of two teeth
Stock Length: The usable length for timing pulley stock. usable length will only include areas of the pulley stock that contain fully cut teeth.
For information on how to best measure your pulley, see our How to Measure Your Pulley page or contact us at [email protected] or 1-800-776-9315.