Our team of experts has access to the latest technology and state-of-the-art equipment for the most modern and efficient production processes. Production takes place in our spacious production and assembly halls totaling 3,700 m2. Our maximum lifting capacity is 20 tons. We have a great many years of experience in mechanical assembly and maintenance of various machines and devices.

State-of-the-art machinery

In our factory we perform various operations such as (complex) welded structures, sheet metal work, construction work and machining of steel, aluminum and stainless steel for customers in various sectors. Our machinery is designed to supplying both light and heavy structural elements.


This Summer [2017] we moved, together with our sister company KTB, to our new building in Hattemerbroek. ROTHI will follow in October. We now have a larger production hall totaling 4.800 m2 with a maximum lifting capacity of 50 tons.


We are BS EN ISO 9001: 2008, BS EN 1090-1/ 2 + A1: 2011 and BS EN ISO 3834-2: 2006 certified. We carry out many common welding processes such as MIG / MAG, TIG and submerged arc welding. Complex welded structures are executed under EN ISO 15614-1, EN ISO 9606-1 (formerly EN 287-1), ASME IX, AWS D1.1 and D1.2 certifications.

Consmema is part of the machinery group

KTB designs and produces innovative special equipment and structures for national and international clients.
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ROTHI is an engineering works, specialized in machining (turning and milling), maintenance and repair and mechanical engineering.
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