26
Troubleshooting
Below shows a table listing all the possible issues with the PRO-TEK G3 chuck:
Insert jams when partially
threaded into body
1. Check insert thread and chuck body thread are
free from damage.
2. Check insert has engaged with chuck body thread
correctly.
3. Check if there is any buildup of debris on either
thread (insert and chuck body)
Chuck body appears not
to run true (Or run to its
specified tolerances)
Excessive runout of the chuck mainly originates from
two reasons:
1. Poor mounting of the chuck inserts (insert –
spindle, insert – chuck) – If insert version
2. Poor mounting of the chuck body – If non-insert
version
3. Mechanical issues such as:
a. Debris contamination
b. Inaccurately machined parts
Follow the runout inspection procedure (Using a dial
gauge) in the section below to determine the level of
runout of your chuck.
Ensure the jaws are mounted on the chuck sequentially
in a counterclockwise order (The numbers engraved on
the jaws should be matching the jaw slide numbers)
Follow the instructions shown in this manual:
i.e. Loosen the jaw screws and fully tighten the jaws
after contracting the jaw slides.
If the method in the manual does not resolve the issue:
1. Loosen the jaw screws
2. Using a known cylindrical part with diameter of
approximately 15mm, firmly clamp it in the center
of the jaw
3. Fully tighten the jaws while the jaws are holding
onto the cylindrical part.
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