If you want to weld aluminum, you might think skill-intensive TIG welding is the only way. However, if you already own a MIG welder, an add-on spool gun is a viable option. Retailing for $276, Miller ...
The company now offers two spool guns: the Prince XL and Magnum SG. The Prince XL is rated at 200 amps at 100-percent duty cycle. At speeds to 900 inches per minute, the gun can feed wire from 0.030 ...