When stud welding, it is important that you carefully adhere to the following guidelines, including the time and amps by stud diameter.

Stud Welding Guidelines:

• Set appropriate time for the weld base diameter.
• Set appropriate amperage for the weld base diameter.
• Ensure that the negative polarity is to the stud gun.
• Align accessories so they are centered and adjust legs so that 3/16″ to 1/4″ of the stud protrudes beyond the ferrule.
• Ensure a good, clean ground connection.
• Keep work surface relatively clean so that impurities don not affect weld.
• Keep studs and ferrules clean and dry.
• Test welds at the beginning of each shift or change in stud (AWS Bend Test).
• Check burn off (1/8″ to 3/16″ depending on stud diameter).
• Check weld fillet (360 degrees).
• Visually inspect all welds.

Time & Amps by Stud Diameter

Stud Diameter	Time (seconds)	Current (amps)
1/4	.20 – .25	350 – 450
5/16	.25 – .30	450 – 600
3/8	.33 – .40	525 – 700
7/16	.40 – .45	675 – 750
1/2	.50 – .55	750 – 925
5/8	.65 – .70	1100 – 1400
3/4	.85 – .90	1450 – 1750
7/8(+)	1.00 – 1.20	1700 – 1950