Back Side Offset: The width from the center of the pulley to the backside edge of the hub or bore adapter.
Bearing ID: The inside diameter of the bearing used in the pulley. This is useful for determining which bore adapters will work.
Belts that fit: These are belts that fit into the groove of the v-groove idler or drive pulley. A belt is considered to fit into a pulley if both the following are true:
- The narrowest part of the belt does not touch the bottom of the V-groove.
- At least 3/4 of the belt fits inside the groove of the pulley. A slight overhang is acceptable.
IMPORTANT: A pulley can work with your belt but still not be appropriate for your system. For more information, check out our blog post, The Best Pulley for your V-Belt or contact us for assistance.
Finish: The finishing material used to prevent rusting in steel or cast iron. Zinc Plating and powder coat provide the longest rust prevention.
Frontside Offset: The width from the center of the pulley to the front edge of the hub or bore adapter.
Groove Angle: The angle of the v-groove.
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.
Material Thickness: Refers to the thickness of steel products only. This helps determine the overall sturdiness of the part. For Idler Pulleys, material thickness greater than 0.07” is considered Heavy Duty. For Drive Pulleys, thickness of 0.14” or greater is Heavy Duty.
Outside Diameter: The distance across the face of the pulley, from outside edge to outside edge
Overpin Diameter: Distance from the topmost part of the pin. Helpful for understanding the belt effective diameter.
Pin Diameter: Description of the pin used to determine the belt with the best fit.
Stickout: The distance from the edge of the pulley’s flange to the edge of the bore adapter or hub.
Throughbore: Length of the bore of the pulley, from one edge to the other. The Frontside Offset and Backside offset together equal the length of the throughbore.
Width: The distance from side to side of the pulley, across area where the belt rides