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Model G0740 (Mfg. Since 11/12)
Figure 51 shows the MT#3 dead centers includ-
ed with the lathe. In addition, an MT#5–MT#3
tapered spindle sleeve is included for mounting in
the spindle.
Dead Centers
A dead center is a one-piece center that does not
rotate with the workpiece and is used to support
long, slender workpieces
Use the dead center in the spindle for operations
where the workpiece rotates with the center and
does not generate friction.
The carbide-tipped dead center can better with-
stand the effects of friction and is best used in the
tailstock where the workpiece will rotate against
it. The tip of the center must be generously lubri-
cated during the operation to avoid premature
wear and maximize smooth operation. Using low
spindle speeds will also reduce the heat and wear
from friction.
Figure 51. Adapter sleeve and dead centers.
Dead
Center
Adapter
Sleeve
Carbide Tipped
Dead Center
Centers
Live Centers
A live center has bearings that allow the center
tip and the workpiece to rotate together; it can be
installed in the tailstock quill for higher speeds.
However, a live center typically does not provide
the same level of rigidity as a dead center, and
final workpiece accuracy can suffer as a result.
Mounting Dead Center in Spindle
1. DISCONNECT LATHE FROM POWER!
2. Thoroughly clean and dry the tapered mating
surfaces of the spindle bore, adapter sleeve,
and the center, making sure that no lint or oil
remains on the tapers.
Note: This will prevent the tapered surfaces
from seizing due to operational pressures,
which could make it very difficult to remove
the center.
3. Mount a chuck or faceplate onto the spindle,
whichever is correct for your operation.
4. Insert the center into the sleeve, then insert
the sleeve into the spindle bore through the
chuck or faceplate.
Figure 52 shows an example photo of a dead
center installed in the spindle, using a lathe
dog and faceplate for turning between cen-
ters.
Figure 52. Example photo of using a dead
center with a faceplate and lathe dog.
Dead Center
Lathe
Dog