The Proteus Framebuilding Book - Proteus Bicycles

Just get ones with metric, or English and metric markings. Wheneveryou may need a drill press (such as drilling a fork, crown, etc.)a high school metal shop may be helpful. As for getting and usingtorches, I am not as sure as to where you may be successful. Toolrental businesses might have them, or a friend might be helpful.In any case, read as much as possible or have someone instruct youon all points of safety. In general, a fuel gas such as acetyleneor Mapp Gas in conjunction with oxygen works best. I do not recommenda propane torch even if used with silver. This is not to saythat it is impossible to use, just more difficult. Before youproceed to make any frame sections, read the pertinent chapterthrough beforehand. This will give you a better understanding ofwhat you are doing. When in doubt, use common sense. Good Luck.GENERAL PROCEDURETo properly braze a joint, especially a sleeved joint such asa lug, two areas of concern should be watched carefully- -cleanlinessand fit. As far as cleanliness is concerned, it should be fairlyobvious that the braze material will hold much better if it isattached to metal rather than the dirt or grease on top of the metal.Also the ease and neatness with which the braze material flows underor along a lug or other fitting will increase as cleanliness increases.The simplest way to insure cleanliness is to remove allforeign material from the metal. If the metal has heavy grease onit, use a solvent such as Varsol to remove the grease. Either dipthe metal into the Varsol or use a rag. Then wipe dry with a cleancloth. Repeat the same procedure if the grease persists. Next,use some abrasive paper or cloth to get down to bare metal. Many2