After preheating the Aluminum Heating Rings, they are clamped on the bearing inner ring to quickly transfer the heat to the bearing ring and expand it for dismounting. These heating rings are intended to be removed from cylindrical roller bearings' inner rings. They are developed for dismounting inner rings of cylindrical roller bearing. Aluminum Heating Rings have no flanges or only one flange on the inner ring and are offered in all bearing sizes. They are easy to understand and use. They protect the inner rings of the shaft and the bearing.