Adjusting Feed Clutch - Grizzly G0776 Owner's Manual

—If one half of the shear pin has fallen out
and the leadscrew shaft can be seen
through the pin hole, rotate the leadscrew
until the end of the inner sheared pin can
be seen. Next, insert the
into the hole and tap the pin out through
the other side.
—If the shear pin halves are still stuck in both
sides of the drive hub, center punch one
of the pins and drill an
approximately ⁄
1
4
#8 wood screw into the hole until the screw
begins to thread into the brass. Using pli-
ers, pull the pin from the hole, and drive the
rest of the pin out as outlined above.
4.
Align holes in drive hub with hole in leadscrew,
and tap new shear pin into position until it is
flush.
Tip: For easy shear pin replacement in the
future, use the center punch or a scribe and
mark the end of the drive hub and the side of
the leadscrew with a timing mark to indicate
where true hole alignment is located. Next,
scribe a line on the leadscrew just where it
enters the drive hub, this line will indicate cor-
rect depth of leadscrew. Should the pin ever
shear again, line-up the marks, and drive out
the pin pieces, and tap in the new pin.
Model G0776 (Mfd. Since 7/14)
⁄ " dowel punch
3
16
⁄ " hole in the pin
1
8
" deep. Next, thread the
Adjusting Feed
Clutch
This lathe is equipped with a feed rod clutch,
shown in Figure 137, that connects the feed drive
hub with the feed rod through a set of spring-load-
ed internal steel balls. This clutch helps protect
the apron feed system from overload. The feed
rod clutch comes set from the factory, and unless
there is a problem, it needs no adjustment.
Feed Clutch
Figure 137. Feed rod clutch.
The clutch may slip if the path for the carriage
or the cross feed is obstructed during turning
or facing operations, the tool bit crashes into
a workpiece shoulder, the carriage lock is left
applied when the feed selection lever is engaged,
or if too deep of a cut is taken, causing a sudden
binding of the tool and workpiece.
It is imperative to recognize however, the clutch
is not a foolproof way of protecting your lathe
from damage if an operational mistake is made, a
chuck-carriage crash occurs, or general machine
overloading occur on a regular basis.
Never completely tighten the feed clutch set
screws past the normal setting outlined in this
procedure in an attempt to completely eliminate
clutch slip. Doing so will void the warranty, and
can lead to a non-slipping clutch, resulting in cata-
strophic gearbox damage.
Set Screws
Feed Rod
-81-