Centers - Grizzly G0750GV Owner's Manual

Centers

Figure 44 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
Sleeve
Center
Figure 44. 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 without introducing the
bearing play of a live center.
Use the dead center in the spindle for operations
where the workpiece rotates very slowly and does
not generate excessive 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.
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Dead
Carbide-Tipped
Dead Center
Live
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, or
when more tailstock force is required.
Mounting Dead Center in Spindle
1.
DISCONNECT MACHINE FROM POWER!
2.
Thoroughly clean and dry 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 45 shows an example of a dead cen-
ter installed in the spindle, using a lathe dog
and faceplate for turning between centers.
Dead
Center
Lathe
Dog
Figure 45. Example of using a dead center with
a faceplate and lathe dog.
Model G0750GV (Mfd. Since 03/18)