ABSTRACTADAMCIAK, Michal, Constructional proposal of a mechanism for rotating boilers up to 12 ton of weight. [Diploma Thesis]. University of Zilina. Faculty of Mechanical Engineering; Department of Machining and production Technologies. Supervisor: doc. Ing Vaclav Kraus, Phd. Qualification Degree: Engineer, Zilina, FoMEUoZ, 2016, pages 93The aim of this diploma thesis is to propose a construction of mechanism which will help to rotate boilers of up to 12 ton of weight. The theoretical part of the thesis describes basic elements of welding fixtures and distribution of welding rotators. It also contains constructional proposal of such mechanism under the conditions given by a company. The practical part of the thesis aims to choose and analyse appropriate technical solution as well as to prepare the actual constructional proposal.The diploma thesis also includes tech-economical examination of the total costs of the purchase, implementation and construction of the mechanism for rotating of boilers.Key words: Constructional proposal. Welding rotator. Mechanism for rotating of boilers.