Stud welding

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Stud welding is a form of spot welding where a bolt or specially formed nut is welded on to another metal part. The bolts may be automatically fed into the spot welder. Weld nuts generally have a flange with small nubs that melt to form the weld. Studs have a necked down, unthreaded area for the same purpose.

Weld Studs are used in stud welding systems. Capacitor discharge weld studs range from 14 gauge to 3/8" diameter. They can come in many different lengths ranging from 1/4" to 5" and larger. The have a "tip" on the weld end of the stud that is two-fold in purpose. 1.) It acts as a timing device to keep the stud off of the base material and 2.) It disintegrates when the trigger is pulled on the gun. When it disintegrates it becomes a molten material and helps solidify the weld to the base material.

Arc studs range from a #8 to 1 1/4" diameter. The lengths are variable from 3/8" to 60" (for deformed bars). Arc studs are typically loaded with an aluminum flux ball on the weld end which aids in the welding process.