Date: 2013-08-01

Schaeffler: Correct bearing mounting cuts costs on cement roller press

The correct mounting and dismounting of rolling element bearings can save time and dramatically increase the life of bearings, as well as maximise the availability of critical plant and machinery by avoiding costly breakdowns.

The key is to ensure that the appropriate tools and equipment for the mounting and dismounting of the bearings are on hand for the engineer at the installation or assembly stage. Appropriate tools may include thermal mounting and dismounting tools (i.e. heating plates), induction-heating devices, mounting paste and heating rings, as well as feeler gauges, hydraulic extractors, hydraulic nuts and hand pump sets. Using the correct tools ensures that bearings are mounted and removed easily and quickly without causing damage to the bearings or surrounding equipment and in a safe and reliable manner.

Portland Valderrivas, Spain

Grupo Cementos Portland Valderrivas is the largest group of cement manufacturers in Spain and one of the world leaders in the industry. In 12 out of 17 regions in Spain, product diversification is helping the Group to obtain a large share of the Spanish cement market. The annual production capacity of the El Alto cement plant, for example, is approximately 2.25 million tonnes of grey clinker; 230,000 tonnes of white clinker; 2.8 million tonnes of grey cement; and 280,000 tonnes of white cement. There are two production lines at the plant for grey cement and one line for white cement.

Portland Valderrivas had contracted one of the leading engineering service providers to the cement and mineral processing industry. Four bearings in the company's roller press had to be replaced, as these had reached the end of their maximum service lives. The press is critical to the cement production process. The grinding process must produce a very fine clinker in order to guarantee a high quality final product. If the press does not operate correctly, the clinker produced does not meet these requirements. Portland Valderrivas therefore contracted Schaeffler to carry out the mounting of the new bearings and to show the engineering service provider

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