Half Nut; Carriage Controls - Grizzly G4015Z Owner's Manual

Half Nut

The half nut lever is located under the left hand
side apron as shown in Figure 19. This handle
may be engaged and disengaged while the
machine is running and while making a cut. Move
the lever to the down position and the half nut is
engaged. Because the threads of the nut and
Lead Screw will not always be aligned, engaging
the half nut may require waiting until they are. Do
not force the handle. Apply light pressure to the
handle and when the threads are aligned the
handle will engage.
half nut
lever
Figure 19. The half nut lever and carriage lock.
Carriage Lock
The carriage lock lever is located under the right
hand side of the apron as shown in Figure 18.
This allows the carriage to be locked in place for
precision facing operations while using the lathe
or to make a set up in a milling operation more
rigid, among other things.
G4015Z Lathe/Mill
carriage
lock

Carriage Controls

The lathe has 3 handles for manual control of the
tool bit during machining operations. One full turn
on the cross slide or longitudinal hand cranks will
produce 0.100" (one tenth of an inch) of motion.
The cross slide and apron hand crank have dials
with divisions showing relative motion. The com-
pound has a direct reading scale on its side
which is calibrated in 1 millimeter increments.
The following is a description of each slide and
their measuring characteristics.
Compound Slide - This slide is adjustable to
any angle. By loosening the bolts at the swivel
base as shown in Figure 20, the compound may
pivot to any angle relative to the turning axis of
the lathe spindle. This feature allows tapered
cuts to be produced on a workpiece, and when
set to 60˚, is helpful in cutting threads, etc. The
scale on the side of the slide has divisions in mil-
limeters and is 80 millimeters long. Each line
marks 1 millimeter (or about 0.03937"). The tool
post is mounted to the top of the compound slide
and when removed allows the slide to be used as
a vise.
Figure 20. Changing the angle on compound.
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