Grizzly G9249 - Manual (Page 26)

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g9249 12" x 37" Belt drive gap Bed lathe
using the 3-Jaw chuck
the 3-jaw scroll-type chuck included with this
lathe features hardened steel jaws that center the
workpiece. When the operator opens or closes
the jaws with the chuck key, the jaws move in
unison.
there are two sets of jaws included with the
3-jaw chuck—inside and outside jaws. use the
correct jaws for the size and configuration of the
workpiece to hold it firmly and securely on the
chuck (see
figure 25 for examples).
8aVbe^c\^cVc>ch^YZ9^VbZiZg
8aVbe^c\dcVcDjih^YZ9^VbZiZg
figure 25. example of using the 3-jaw chuck.
Tools Needed Qty
Chuck Key ......................................................... 1
To mount a workpiece in the 3-jaw chuck:
1. disConneCt lAthe FroM poWer!
2. use the chuck key to open the jaws until the
workpiece sits flat against the chuck face and
jaw step, or fits in the chuck hole.
3. Close the jaws until they just make contact
with the workpiece.
4. turn the chuck by hand to make sure the
workpiece makes even contact with all
three jaws and is centered, as shown in
figure 26.
— if the workpiece is not centered, loosen the
jaws and adjust the workpiece.
— if the workpiece is centered, fully tighten
the jaws.
figure 26. example of workpiece firmly held in
the center of the 3-jaw chuck.
Tools Needed Qty
Chuck Key ......................................................... 1
To remove and install the jaws:
1. disConneCt lAthe FroM poWer!
2. use a piece of wood to protect the bedways.
3. insert and turn the chuck key counterclock-
wise and back the jaws all the way out.
Note: If this is the first time you are removing
the jaws, mark each jaw and its jaw guide
with a numbers 1–3. Returning the jaws to
the same jaw guide on the chuck will make
installation easier.
4. Clean the jaw mating surfaces and apply a
film of light multi-purpose grease to these
surfaces.
Note: Store jaws in a place free from mois-
ture and abrasives.