Paint Imron and PPG - Our painters are all excellent. We can supply anything imaginable, from simple to exotic. Custom frames are joined either by using fillet brazing, by using lugs or by tig welding. The big advantage of fillet brazing is versatility. Any tube size or angle, is possible.
Lugs confine the maker to the exact diameter and angles of the lugs.
Strengthwise the fillets produce the smallest stress riser because they taper out to nothing. Stress risers are a problem with some lugged frames, and these are more likely to develop cracks near the joint, usually next to the lug. We also taper the lugs. TIG joints also create more of a stress riser because of the short transition from the highly heated joint to the tube. Fillet brazing is done with brass, but at a lower temperature than when brass is used with lugged brazing, where the brass has to hit an 1800 degress F to capilate through the lug.