Centers; Spider - Grizzly G4003G Owner's Manual

Centers

A tailstock center supports stock that is too
long to be supported by the chuck alone. The
tailstock barrel and live center have an MT#3
taper. Included with this lathe is an MT#3 to MT#5
spindle sleeve. If you need to install a center in the
spindle when using the face plate, you can do so
by using this adapter sleeve.
Before installing any center or arbor, make sure
that the mating surfaces are perfectly clean.
These parts will last longer and remain accurate if
properly maintained. If oil is present on the mating
surfaces, the tapers will not interlock.
To install the center, insert the end of the center
into the tailstock bore until it seats. Once the
workpiece is installed, the force of a mounted
workpiece will fully seat the taper.
When using a live center, the tailstock barrel
should protrude about
(see Figure 21).
To remove the live center, back the tailstock barrel
all the way into the tailstock casting. The live cen-
ter will pop out. Be sure to catch it when it comes
out to avoid damaging the tip.
Figure 21. Live center installed in tailstock.
-22-
⁄ " and not more than 3"
1
2

Spider

Your lathe is equipped with a set of outboard
spindle supports otherwise known as a "spi-
der" (Figure 22). Use the spider when a long
workpiece has the potential for wobble or vibration
when it extends through the outboard side of the
headstock.
The tips of the spider screws have brass wear
pads that hold the workpiece without causing
indents in the finish.
When installed, make sure to always use the jam
nuts to lock each spider screw in position. Merely
tightening the spider screws against the workpiece
and leaving the jam nuts loose is not safe. The
spiders screws may loosen up during lathe opera-
tion and crash into the lathe end cover.
Remove the spider screws when not in use.
Always disconnect the lathe from power
when installing, removing, or adjusting the
spider screws. Ignoring this warning can
lead to personal injury or machine damage.
Figure 22. Spider.
G4003G Gunsmith's Lathe