Centers - Grizzly G4000 Owner's Manual

Centers

your Model g4000 lathe includes three centers: 1)
an Mt#2 live center, 2) an Mt#3 dead center, and
3) an Mt#2 dead center, as shown in figure 25.
Live
Center
figure 25. the Model g4000 centers.
the spindle taper is an Mt#3 and will only receive
the Mt#3 dead center. the tailstock quill can
accommodate both the Mt#2 live and dead cen-
ter.
Dead Centers
the Mt#2 dead center installed in the tailstock
quill is used to support stock that is too long to be
supported by the chuck alone (see figure 26 for
an example).
figure 26. Example of using a dead center
installed in the tailstock.
Model G4000 (Mfg. Since 8/09)
dead
Centers
dead Center
When mounting a long, slender workpiece that
extends more than 2 ⁄
1
2
the chuck jaws, use a center mounted in the
tailstock to support it.
since the dead center does not rotate with the
workpiece when used in the tailstock, the tip of
the center must be lubricated with an anti-sieze
lubricant to avoid premature wear and maximize
smooth operation. Also, keep the spindle speeds
low to reduce the heat and wear from friction.
install a lathe dog when using the Mt#3 dead cen-
ter in the spindle (see figure 27 for an example).
dead Center
Lathe dog
figure 27. Example of using a dead center with
a faceplate and lathe dog.
When using a center in the spindle to mount
a workpiece, the other end of the workpiece
MuST be supported by a center installed in
the tailstock quill to safely hold the workpiece
in place during operation. Otherwise, the
workpiece will leave the lathe when the
spindle rotates and could cause serious per-
sonal injury or property damage.
times its diameter beyond
-25-