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The trial approbation of the various technological circuits rolling-draged, has shown, that most efficient in conditions of rolling laboratory of Institute of black metallurgy is the technological circuit calibring of tapes with use of a priciple of constant width in a combination to transitions in vertical rolls for prevention current of metal in backlashes of calibre and formation lateral salvage.

There are examined the different technological processes of endless rolling, stipulating for jump welding of slugs into endless string and direct alignment of the processes of continuous casting of slugs and rolling. There are marked the successes of foreign firms on using of the process of endless rolling in the foundry-rolling units.

There are examined the peculiarities of the process of spiral winding for production of steel piston rings at using of new constructions of spiral-winding mashine-tools, working on one-thrust and two-thrust schemas of winding.