Jet 321378, Operating Instructions And Parts Manual

Page: 15 / 56

15
9.4 Taper turning using tailstock off-
set
Offsetting the tailstock can turn work to side angle
of 5º. The angle depends on the length of the
workpiece.
To off-set the tailstock, loosen locking lever (1,
Figure 16), then loosen the front adjusting screw (2)
and take up the same amount by tightening the
opposite rear adjusting screw until the desired taper
has been reached. Tighten the front screw to lock
the tailstock in position. The workpiece must be held
between two centers and driven by a faceplate and
driver dog.
After taper turning, the tailstock should be returned
to its original position. Turning a test piece with
constant adjustment until the piece is absolutely
true checks the zero position of the tailstock.
9.5 Taper turning by setting the top
slide
By angling the top slide, tapers may be turned
(Figure 17).
Loosen two screws (1, Figure 17); top slide can then
be rotated. A graduated scale permits accurate
adjustment of the top slide. This method can only
be used for short tapers.
9.6 Turning Between Centers
For turning between centers, it is necessary to
remove the chuck from the spindle. Fit the MT-3
center into the spindle nose and the MT-2 center
into the tailstock.
Mount the workpiece fitted with the driver dog
between the centers. The driver is driven by a catch
plate or face plate (Figure 18).
Note: Always use a small amount of grease on the
tailstock center to prevent center tip from
overheating.
Figure 16
Figure 17
Figure 18