Centers - Grizzly G4003G Owner's Manual

Centers

Figure 43 shows the MT#3 dead centers and
live center included with the lathe. In addition, an
MT#5–MT#3 tapered spindle sleeve is included
for mounting in the spindle.
Adapter
Dead
Sleeve
Center
Figure 43. Adapter sleeve and centers.
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.
Model G4003G (Mfd. Since 1/15)
Live
Center
Carbide-Tipped
Dead Center
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.
Mounting Dead Center in Spindle
1.
DISCONNECT LATHE FROM POWER!
2.
Thoroughly clean and dry the tapered mating
surfaces of spindle bore, adapter sleeve, and
center, making sure that no lint or oil remains
on 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 faceplate onto spindle.
4.
Insert center into sleeve, then insert sleeve
into spindle bore through faceplate.
Figure 44 shows an example photo of a dead
center installed in spindle, using a lathe dog
and faceplate for turning between centers.
Dead Center
Lathe
Dog
Figure 44. Example photo of using a dead
center with a faceplate and lathe dog.
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