A centrally located ridge on the upper roll tools of the fin pass section of a tube mill designed to extend into the gap between the edges of the strip. This ridge may be part of the upper roll tool or more generally a separate piece of tool steel. The purpose of the fin blade is to set the size of the opening and angle of the edges of the strip in preparation for welding.
The Fabricator Blog
Still Building America—Jump into your trade with both feet - by Josh Welton Interested in a career in welding and fabrication? Take advantage of opportunities to learn more, and you might find yourself on a fulfilling career path, just like Jonathan Lewis.
North America's leading magazine for the metal forming and fabricating industry, delivering news, technical articles, and case histories. Print subscriptions are free to qualified persons in North America involved in metal forming and fabricating.
TheFabricator.com provides metal fabrication professionals with market news, the industry's best articles, product news, and conference information from the Fabricators & Manufacturers Association, Intl.