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For Machines Mfg. Since 7/09 Model SB1016/SB1036
-41-
OPERATION
6. After the workpiece is held in place by
the jaws, turn the chuck by hand and pay
attention to the workpiece alignment.
— If the workpiece is not correctly aligned
for your operation, turn the chuck and
make fine adjustments by slightly
loosening one jaw and tightening the
opposing jaw until the workpiece is
correctly aligned (see Figure 61 for an
example).
Figure 61. Example of non-concentric workpiece
correctly mounted on the 4-jaw chuck.
Tailstock
The tailstock is typically used to support long
workpieces by means of a live or dead center
(refer to Centers on Page 47). It can also be
used to hold a drill or chuck to bore holes in
the center of a part. Custom arbors and tapers
can also be cut on your lathe by using the off-
set tailstock adjustment screws shown in (see
Figure 63).
The tailstock quill is 3" diameter, has an MT#5
taper, and has 6
1
⁄2" of travel. If a tool ever
becomes stuck in the bore where using the
handwheel cannot extract the tool, the quill is
also equipped with a slot for using a drift key
(see Figure 62) to remove the stuck tool.
Figure 62. Tailstock controls.
Drift Key
Quill
Stuck Tooling
Cut into the quill is a 6
1
⁄2" long inch-scale that is
broken down into
1
⁄8" increments, and a 16.8cm
long metric scale that is and is broken down in
millimeters. Inside of the quill at the end, an
internal slot is present to accept drill and arbor
lock tangs. This feature is especially useful when
the tailstock is expected to hold large diameter
drill bits where the torque loads would break
most tooling free.
When maximum rigidity is mandatory, the
tailstock has a secondary lock bolt and clamp (see
Figure 64) that adds additional clamping force
to that of the standard tailstock lever.
The handwheel is quipped with a graduated
collar that is broken down in increments of
0.001" where 360°= 0.200" of quill travel.