Miller Arc Stud Welding Fundamentals, Manual

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Page 12
3-6. Stud Specification Chart
The stud manufacturer’s catalogs will list the characteristics and dimensions of the various studs available. When set-
ting up the welding parameters, the diameter (where contact is made to work) should be used as the determining factor
for amperage and time setting. On threaded fasteners, the diameter may be less than the threaded diameter.
Before Weld After Weld (AW)
(H)
(D)
(L)
(A)
(E)
(F)
SPECIFICATION TABLE
Diameter and Thread
(D)
Minimum (AW)
Length
(A) (H)
Minimum (AW)
Length
(L)
Weld Bead Dimensions
(E) (F)
1/4 - 20
5/16 - 18
3/8 - 16
1/4
1/4
1/4
.217
.275
.312
5/8
5/8
5/8
5/16
13/32
7/16
3/32
7/64
7/64
7/16 - 14
1/2 - 13
5/8 - 11
1/4
5/16
5/16
.375
.437
.500
3/4
3/4
7/8
1/2
19/32
11/16
1/8
9/64
5/32
3/4 - 10
7/8 - 9
1 - 8
1/2
1/2
5/16
.625
.750
.875
1 - 1/8
1 - 3/8
1 - 7/8
7/8
1
1 - 1/8
3/16
3/16
3/16
The stud gun should be set up in accordance with the manufacturer’s recommendation. The timing device on control
circuit and power source should be adjusted to approximate settings shown in stud welding table (see Section 3-7).
3-7. Recommended Settings For Stud Welding Of Steel
STANDARD TABLE METRIC TABLE
Stud Size Current Time Stud Size Current Time
1/4 Inch 300 Amps .220 Seconds 6 mm 350 Amps .250 Seconds
5/16 Inch 410 Amps .300 Seconds 8 mm 420 Amps .310 Seconds
3/8 Inch 520 Amps .360 Seconds 10 mm 580 Amps .430 Seconds
1/2 Inch 750 Amps .450 Seconds 12 mm 720 Amps .500 Seconds
5/8 Inch 980 Amps .730 Seconds 14 mm 880 Amps .590 Seconds
3/4 Inch 1325 Amps .750 Seconds 16 mm 1040 Amps .660 Seconds
7/8 Inch 1680 Amps .830 Seconds 20 mm 1440 Amps .780 Seconds
1 Inch 2000 Amps .870 Seconds 24 mm 1900 Amps .850 Seconds
Amperage values shown are actual metered readings and not necessarily the dial settings on the power source. The
amperage and time values shown are approximately the mid-point of the operating range. Similar results can be ob-
tained with a lower amperage setting and more time, or with higher amperage setting and less time. Consideration
should be given to cable sizes, lengths, condition of material, type of stud, etc., when comparing settings from charts to
actual conditions.