In the world of custom metal fabrication, welding is the most crucial joining technique because the weld strength determines the structural integrity of the entire vehicle. The two most popular gas arc welding methods used by professional builders to construct chopper frames are TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding. Each method has specific advantages and application areas.
TIG welding is favored by master builders because it produces very clean, strong, and aesthetically pleasing welds often described as a “stack of dimes.” TIG uses a non-consumable tungsten electrode to strike the arc, while the filler metal is added manually with the other hand. TIG requires immense focus and hand dexterity to control the heat, making it the best method for welding visible frame joints so they look neat without requiring extensive grinding.
On the other hand, MIG welding offers a much higher working speed and is easier to learn. MIG uses a continuously fed wire electrode as both the electrode and filler metal. This method is highly effective for welding thick plates, internal brackets, or parts requiring fast heat penetration. A combination of TIG for external aesthetics and MIG for internal efficiency is the secret of professional custom shops to produce premium quality vehicles efficiently.
