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Model T10808 Wood Lathe Chuck Set
-5-
To mount the chuck onto the lathe:
1. DISCONNECT LATHE FROM POWER!
2. Thoroughly clean threads of spindle and
chuck bore with mineral spirits and a stiff
brush.
3. Properly mount top jaws onto bottom jaws.
4. To prevent chuck binding to spindle under
operational forces, apply a thin coat of ISO
32 or equivalent oil to spindle threads.
5. Thread chuck onto spindle and hand tighten.
It should screw on without binding or exces-
sive play.
6. Lock spindle in place.
7. Back chuck off slightly, then quickly rotate
chuck onto spindle. This will firmly seat the
chuck.
Indexing
The chuck back plate has indents and num-
bers for performing indexing operations. Indexing
allows the circumference of the workpiece to be
divided into equal segments.
An indexing arm (not included) is required to take
advantage of this feature. Research books and
the internet to better understand the process,
what is required, and how to perform indexing
operations.
Chuck Types
The best jaw type to use is the one that will pro-
vide the greatest contact between the jaw and the
workpiece—this provides the best gripping power!
Round Jaws
Round jaws (or dovetail jaws) are typically either
closed around a tenon (or foot) turned on the bot-
tom of a bowl, or they are expanded into a recess
cut into the workpiece. The tenon is later removed
with the workpiece mounted on the flat jaws.
A dowel workpiece can also be fed through the
center of the chuck and spindle bore, and gripped
with center surfaces of the jaw flats. As each
piece is turned and cut off, the dowel can be
advanced for the next piece.
The #2 round jaws have a slight dovetail profile. If
a matching profile is cut into the recess, the jaws
can expand with much greater gripping power.
#2 Round Jaws
#3 Round Jaws
The #3 round jaws can hold much larger
workpieces than the #2 round jaws and have
ridges that press into the wood for a better grip.
When mounting workpiece on jaws, do not
contact workpiece with the lower flat of
jaws. This provides better gripping power
and avoids any inconsistencies between
surfaces that would interfere with true rota-
tion.