Rollers – Between Frame

Between Frame Dimension Information

The between frame dimension, or “BF”, refers to the width between frames that the roller needs to fit into. The rollers are built to a BF-1/8″ dimension, to allow 1/16″ of space between the cone of the bearing and the frame rails on both sides. This is to allow sufficient clearance for the rollers to spin freely without undue friction.


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