BLUESTAR Rebar Friction Welding Machine BLUESTAR is a leader in Friction Welding Technolog, having over a decade of mastering the art and science of Engineering Rebar Friction Welding Machines, BLUESTAR’s engineers utilize principles of precision and reliability. Integration of automation improves productivity while optimization in cost and quality is achieved through the use of precision machines. The machines are designed to automate costly manual operations enabling high precision and reliability.