Dematic 21-1 2 BF 21-1 2 Crowned Conveyor Roller

Dematic 3" OD crowned conveyor weighted roller. The listing identifies this component as a crowned roller with a 3" outside diameter and notes BF 21-1 2" and face width 21-1 2" in the product description. Described as a weighted roller, it carries added mass as part of its construction. As a Dematic crown roller, it is intended for use on conveyor systems that require a 3" diameter crowned roller and the specified face width. Key specifications visible in the product title and description include a 3" outer diameter, crown geometry, BF 21-1 2", and face width 21-1 2". This part serves as a replacement component in Dematic conveyors and is suitable for industrial material handling environments where a durable, crowned, weighted roller is needed to support belt operation and load transfer along the line. Typical applications include warehousing, manufacturing, and distribution centers where Dematic or compatible crown-roller configurations are employed.