Candidates for friction welding will have one cylindrical part. Parts that have diameter changes over its length are also candidates. With tooling, friction welding can accommodate asymmetrical parts such as a block to a rod, and unique shapes. These parts should be parallel to each other. Sometimes instead of a solid diameter, the use of a tube will be more cost effective and render the part just as strong.
Spinweld looks forward to helping you with your welding opportunities!