Turn the other cams in the same way. Make
sure to support the chuck with one hand as
you align the last cam. The chuck may come
off at this point, so it is important you are
ready to support its weight.
Remove the chuck key.
—If the chuck is still tight on the spindle,
tap the back of the chuck with a rubber or
wood mallet while supporting the bottom of
the chuck with your free hand.
—If the chuck does not immediately come off,
rotate the spindle approximately 60˚ and
tap again. Make sure all the marks on the
cams and spindle are in proper alignment.
G4003G Gunsmith's Lathe
To install a chuck:
DISCONNECT LATHE FROM POWER!
Place a piece of plywood across the lathe
bed and position it just under the spindle.
Align the pins in the back of the chuck with
the holes on the spindle face and insert the
While supporting the weight of the chuck, turn
one cam with the chuck key until the cam line
is between the two V's on the spindle. Do not
tighten at this time.
Rotate the spindle and repeat Step 4 on
Rotate the spindle and repeat Step 4 on the
rest of the cams in an alternating manner.
When all cams are snug, return to the first
cam and tighten the cam completely. Repeat
this step with the rest of the cams.