Tips For Interviewing Contractors

Tips For Interviewing Contractors

Starting Your Own Manufacturing Business And Not Sure Which Stud Welder To Buy? Compare The Two Systems Below

Jessie Bell

The most commonly used types of stud welding processes are the Capacitor Discharge method, usually called "CD," and Arc Stud Welding.  Below is an explanation and comparison of the two systems and how they are used in various industries. The information should help you make a well informed choice, especially if you are just starting out. The right welding system can help your business get off the ground..

Capacitor Discharge System – How It Works

  • The CD system uses electricity to attach fasteners to sheet metal. This method works with fasteners up to 3/8 inch in diameter and thin metal sheets.
  • In the contact method, the weld stud is held against the work site, the electrical charge melts the sheet metal and the stud is forced into the still liquid metal.
  • The gap method places the weld stud above the work site, forcing the stud into the molten metal as it is melting, often used when welding aluminum or other materials that conduct heat well.
  • When the metal is cooled, it creates a bond that is often stronger than the fastener.
  • Markings rarely appear on the reverse side of the weld, making ideal for items requiring a smooth, flat surface.
  • The CD system uses 110 volt power and can handle up to 20 welds each minute.
  • Most fasteners and metal sheets made of different materials may be welded together.

Arc Stud Welding – How It Works

  • Arc stud welding, usually used on heavier or thicker metals, uses both electricity and a ceramic ferrule to create the bond between fastener and metal sheet. In this case, the ferrule is a ring that is placed at the welding site by the stud metal tip.
  • The stud is raised and electricity is used to create the arc. The stud is then forced back down into the metal, which melts the ferrule and adjacent metal to create the weld.
  • Arc stud welding can weld fasteners measuring up to 1-1/4-inch and place them on heavier metals, such as those used in ship-building or other heavy construction.
  • The weld zone penetrates the entire metal sheet, adding extra strength to that weld.
  • Arc welding uses more power, either 220 or 440 DC, or direct current, power source.

Use of the Two Systems in Various Industries

 While the arc stud system lends itself to heavy duty welding, such as in ship manufacturing or building construction, the CD welder is used for more delicate work or when you want a flawless surface.:

Automotive Manufacturers

CD stud welders are used to prepare or assemble heat shields, power steering systems, parts of dashboards, brake lines, lighting and other electrical systems. While arc welding systems are used for items such as the chassis, the CD system comes in handy when installing smaller parts that just might be visible when the vehicle is completed.

Farm Equipment Manufacturers

Uses in the farming equipment industry are similar to the auto industry. Tractors, combines and other machines must stand up to the rigors of nearly non-stop use. Arc stud welders are used in the manufacturing of fenders, driver cabs, and various heavy duty farm attachments. CD welders are used for supplementary parts, such as electrical systems. On a smaller scale, CD stud welding is often used in manufacturing ride-on home mowers and seeders.

Commercial and Retail Appliances

Those in the restaurant trade rely on heavy duty refrigerators, dishwashers and cooking equipment, all created using the arc or CD systems.  Heating and air conditioning units are also on that list. That oversized barbeque in the backyard and that outdoor kitchen usually benefit from CD welding because of its flawless capabilities. The same goes for home appliances, where looks are usually as important as function. Cookware manufacturers prefer CD stud welding to make pots, pans and utensils. Electrical appliance manufacturers use CD welders in making cookers, toasters and electric frying pans.


Since CD stud welding can be used for lighter metals, jewelers often prefer this method to make pins, earrings and other pieces.

For more information about stud welding and its various uses, contact a company like Northland Fastening Systems.


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About Me
Tips For Interviewing Contractors

When I started looking for someone to build my dream home, I realized that I was going to need to be very picky about how I wanted things to proceed. Instead of just choosing anyone to do the work, I started realizing that I needed to work harder to find the perfect team of experts. I started looking everywhere for just the right people, and I was really impressed with one team that stood out to me. They built an absolutely breathtaking home for us, and I know that it might not have worked out that way had we worked with different people. This blog is all about interviewing contractors.