© 2016 Nelson Stud Welding, Inc.
Page 11
All Rights Reserved.
February 2016
Part No. 729-110-042 v1.03
3 Gun Set-Up
3.1 Chuck Assembly Instructions
The unit should be switched off before inserting or changing a chuck.
3.1.1
Chuck Assembly
At the beginning of a welding series or in case of a necessary change to different stud dimensions, the chuck
must be set to the correct stud type.
The chucks (
Figure 3.1 Chuck and Stop Assembly
) are not included and should be ordered separately.
*See
” for correct sizes and part numbers.
Job Preparation
Tools Required: Screwdriver, open-end wrench (7mm, 8mm), and caliper gauge
1
Select chuck with the correct diameter for the stud to be welded.
2
Stop pin assembly for the proper stud length.
3.1.2
Adjusting Chuck and Stop Assembly
The unit should be switched off before inserting or changing a chuck.
To adjust the Chuck and Stop Assembly (Figure 3.1 Chuck and Stop Assembly):
The proper size chuck for the type of stud being welded must be used to ensure good electrical contact between
the stud and the stud chuck. If the stud fit seems too loose with the proper chuck, the chuck tines may be pressed
slightly together at the front end of the chuck.
3.1.3
Adjusting Stud Stop Assembly
1
Loosen the set screw.
2
Adjust the stud stop so that the stud being welded extends 4 mm beyond the chuck.
3
Tighten set screw.
NOTE: For long studs, use maximum chuck depth. The chuck is assembled as shown and inserted into the chuck
adaptor. The chuck must be in
firm contact with the stud stop
while tightening the chuck nut.
Figure 3.1 Chuck and Stop Assembly
