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To Begin:Please fill out our Conveyor Roller Quote Form and a Heinrich Brothers representative will contact you. For more immediate help, call us at 724-969-1188

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Between Frame (BF) is the distance between the side frames of a conveyor. Additionally, it is the preferred dimension. This is also referred to as between rail, inner rail, or inner frame. It is sometimes best to measure the conveyor equipment itself to get the BF. Use the tape measure to measure the distance between the two side frames to get the BF. Measure to the nearest 1/32″.

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There are some instances, such as a deep frame, or the way the rollers are set, where the Overall Cone (OAC) is a better measurement. Use the tape measure to measure the distance between the two outermost bearing extensions to get the OAC. Measure to the nearest 1/32″.

Overall Cone (OAC) is the distance between the two outermost bearing extensions. If using an straight edge, place the edge against the cone of the bearings-the very outside of the bearing. Use the tape measure to measure between the edges. Measure to the nearest 1/32″. Add 1/8″ to the total OAC to get the Between Frame width (BF)
Some situations when this should not be done include: Rollers with welded axles. They do not have an OAC.
If bearings are missing from the roller, an accurate OAC cannot be measured. Make note which bearing(s) are missing. If one bearing is good, measure from the edge of the tube to where the bearing meets the axle (the very outside of the bearing) and add it to the other side for an approximate measurement.