WE SPECIALIZE IN HYDRAULIC EXPANDIG JELLY FILLED CUSTOMISEED SPECIAL CLAMPING EQUIPMENT! CONCENTRIC™ Rotary specializes in the development and production of hydraulic and mechanical special clamping equipment. In addition we offer our customers tailor-made and economical solutions for any task. As an original equipment manufacturer for tooling machine manufacturers, we are always involved in the newest technological developments. And that's not all - as a system provider we offer new impetus around the clamping process.