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Priority to JP1974147651UpriorityCriticalpatent/JPS5523681Y2/ja
Publication of JPS5173343UpublicationCriticalpatent/JPS5173343U/ja
Application grantedgrantedCritical
Publication of JPS5523681Y2publicationCriticalpatent/JPS5523681Y2/ja
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21B—ROLLING OF METAL
B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
B21B25/04—Cooling or lubricating mandrels during operation