Sample rotary geometries

Friction welding can accommodate a wide variety of geometries as seen below. The process is best suited to a simple butt joint weld prep. The interface needs to be clean and depending on accuracy/component requirements can either be saw cut square to the axis within 1% or machined. The weld face of both parts needs to be clean and clear of any contaminants, in particular, rust, scale, oxides etc as this can jeopardise weld quality.  

bar to bartube to platetube to platetube to tube