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How to Set Up a Stud Gun for Welding Threaded Arc Studs

WELDER BRANDS: This setup works for Truweld, Proweld, Midwest Fasteners, Erico, and Image light duty stud welder guns.


STEP 1: Determine the Arc Gun Chuck Adaptor you need.

Arc Gun Chuck Adaptors for Midwest Fasteners Proweld Image and Truweld Stud Welders

STEP 2:Screw Arc Gun Chuck Adaptor into stud welding gun.

Truweld Light Duty Arc Gun with Truweld Arc Gun Adaptor

STEP 3:Place the Arc Chuck into the Arc Gun Chuck Adaptor.  Hold the Arc Gun Chuck Adaptorand Arc Chuck in one hand and with the other hand lightly hammer or mallet the Arc Chuck to ensure it is seated properly.

 Arc Stud Gun with Arc Chuck

STEP 4: Determine the size Arc Foot you need.  

  • Stud Diameter 1/8" - 1/2": Small
  • Stud Diameter 5/8" - 3/4": Medium
  • Stud Diameter 7/8" - 1": Large

STEP 5: Determine the type of Arc Foot you need.  Use a Closed Foot for stud lengths of 2" and shorter.  For longer studs, use a Split foot to ease the loading of the stud into the gun.

Stud Welder Arc Foot Medium ClosedStud Welder Arc Foot Medium Split

STEP 6: Screw the 3/8" Arc Legs into the Arc Foot.  The recess of the foot should face out.  Leave the screws loose until you make your final plunge adjustment. 

Arc Gun Legs and Foot for Stud Welder

STEP 7:Slide the foot assembly into the gun so that Arc Chuck sticks out past the foot piece.

 Truweld Light Duty Arc Gun with Adaptor Chuck and Footpiece

STEP 8: Insert an Arc Stud stud into the Arc Chuck.

Truweld Light Duty Arc Gun with Arc Chuck Stud and Footpiece

STEP 9: Determine the ferrule grip you need. For studs 2" and shorter, use a closed ferrule grip.  For studs longer than 2" use a split ferrule grip.

Ferrule GripFerrule Grip

STEP 10: Insert the Ferrule Grip in the Arc Foot.  Tighten the set screws.

 Truweld Light Duty Arc Gun with Stud and Ferrule Grip

    STEP 11:Adjust the foot assembly so that the stud is centered in the middle of the Ferrule Grip.  Tighten the leg screws.

    Stud Centered in Ferrule Grip

    STEP 11:Put a ferrule on the end of the stud and make the plunge adjustment.  The plunge is the amount of the stud that sticks out past the ferrule grip not including the flux ball.

    • Loosen the leg screws in the gun.
    • Adjust the plunge.
    • Tighten the leg screws in the gun.
    Stud Diameter Plunge
     3/8" & 1/2" 3/16" - 1/4"
    5/8" & 3/4" 1/4" - 5/16"
    7/8" & 1" 5/16" - 3/8"

     Arc Stud Gun Set Up for Welding Arc Studs