Quick Summary: Some approximate starting advice is to set the spindle speed between 700-1000 rpms for steel, above 2000 for aluminum, and slow down from there if you get discolored chips or heavy drill bit wear.
Joining and Cutting Processes Web sites that describe joining and cutting processes, basics of welding, and specific types of welding. Welding Links and Resources
What is Brazing? Brazing , simply put, is joining metal to metal by filling the joint with a different, melted metal at temperatures over 840F. The melted metal filling the gap must be able to wet the pieces being joined so that it is drawn into the gap by capillary action.
How to Weld
Welding Equipment and Supply
Tips For Welding Titanium - The Wonder Metal