© 2016 Nelson Stud Welding, Inc.
Page 11
All Rights Reserved.
January 2016
Part No. 729-110-043 Rev. 1.02
4
Gun Set-Up
4.1
Setting Up Chuck Assembly
The unit should be switched off before inserting or changing a chuck.
4.1.1
Setting Up Chuck
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 4.1 Chuck and Stop Assembly) are not included and should be ordered
separately. See Accessories 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.
4.1.2
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 4.1 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.
NOTE: There must be good
electrical contact between the
stud to be welded and the stud
chuck. It may be useful to
press the tines of the chuck
together slightly at the front.
NOTE: During welding, it is very
important to draw the chuck
(gun) straight off the stud after
a weld has been made to avoid
spreading the chuck tines. If
this procedure is not followed,
chuck life may be substantially
shortened.
Figure 4.1 Chuck and Stop Assembly
