-28-
Model M1112 (For Machines Mfd. Since 12/20)
O
PE
R
ATIO
NS
Figure
36
.
Spider.
Figure
35
.
Live center installed in
tailstock.
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.
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 faceplate, 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
1
⁄
2
" and not more than 3" (see
Figure 35
).
To remove the live center, back the tailstock barrel all
the way into the tailstock casting. The live center will
pop out. Be sure to catch it when it comes out to avoid
damaging the tip.
Centers
Your lathe is equipped with a set of spindle support bolts
known as the "spider" (
Figure 36
). Use the spider when
a long workpiece has the potential to wobble or vibrate
when it extends through the outboard side of the lathe.
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 operation and crash into the lathe end cover.
Spindle Spider