Qingdao Theory provides the sevice of planetary gearbox's repair and maintenance.Mmany years of experience of our key partner determine the highest quality of products and services that we offer.

   When planning this segment of our company's activities, we focused on one, basic goal. We want to comprehensively satisfy even the most demanding customers. Our offer is addressed to companies that regenerate gearboxes, services, as well as private individuals who plan to repair their own planetary gearbox.

  We provide replacement parts, both of our own production (the high quality!)