800.852.8352
Midwest Fasteners, Inc. 450 Richard St. Miamisburg, OH 45342
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What is stud welding?
STUD WELDING is a high-speed metal fastening process in which a metal fastener can be applied by arc welding to a metal work piece.
THE PROCESS: The welding stud is placed (with a hand tool called the Stud Gun) in contact with the base metal, an arc weld is drawn which melts the welding stud base and an area of the metal work piece for metal fastening. The welding stud is then forced into the melted area and held in place until the metals re-solidify. This high quality fusion arc weld is complete in milliseconds and is accomplished by one of two major methods.
TWO METHODS AVAILABLE are Capacitor Discharge (usually "CD" for short) and Arc Stud Welding. The differences are shown in the illustrations below.
STUD WELDING SYSTEMS consist of a Power Supply and/or "Controller", a Stud Gun, and cables to tie the system and workpiece together. |
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How does capacitor discharge (CD) differ from arc stud welding? |
Capacitor Discharge (CD) Stud Welding |
Arc Stud Welding |

Stud against work |

Stud and ceramic ferrule against
the work plate |

Stored energy discharged through special weld "timing" tip and stud starts downward |

Stud lifts and arc is drawn |

Stud forced into molten metal |

Control times out and stud plunges into molten steel |

Metal solidifies and weld is completed in milliseconds |

Metal solidifies and weld is completed in milliseconds
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| Capacitor Discharge (CD) Stud Welding Provides |
Arc Stud Welding Provides |
| Welding to thin and sheet metal grade material |
Larger diameter Fasteners (up to 1-1/4") |
| NO reverse side marking |
Penetration of weld zone for structural-type strength |
| Up to 3/8" diameter fasteners |
Welded metal fastening to heavier base materials |
| Only 110 volt power required |
DC (direct current), 220 or 440 volt power sourcing |
| Up to 20 welds per minute |
Ceramic Arc Shields used to maintain weld |
Welded metal fastening of dissimilar metals
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