Half Nut; Apron Power Feed - Grizzly G9729 Instruction Manual

Half Nut

The half nut lever is located under the left hand
side apron (Figure 40). This handle may be
engaged and disengaged while the machine is
running and while making a cut. Move the lever
to the down position to engage the half nut.
Because the threads of the nut and leadscrew
will not always be aligned, engaging the half
nut may require waiting until they align, with the
machine running. Lift the handle in the direction
of the arrow as shown in Figure 40. DO NOT
force the handle, apply light pressure to the han-
dle and when the threads are aligned the handle
will engage.
Half Nut Lever
Figure 40. Half nut lever disengaged.
-38-

Apron Power Feed

The apron power feed is designed to make work
more efficient, provide better surface finishes and
aid in cutting threads.
• Once the proper gears have been installed,
(see Changing Gears on Page 39) and the
feed rate selected, power to the apron and
cross slide is provided by the leadscrew,
shown in Figure 41.
• In the case of the apron, motion starts by
engaging the half nut lever, shown in Figure
40.
• In the case of the cross slide, a ring is pulled
out, as shown in Figure 41.
Cross Slide Ring
Figure 41. Apron controls.
NOTICE
DO NOT try to engage the half nut & cross
slide ring at the same time. While there is
a lock-out provided against simultaneous
engagement, these components could be
damaged if proper procedures are ignored.
G9729 Combination Lathe/Mill
Leadscrew