Leadscrew End-Play Adjustment; Gib Adjustment - Grizzly G0824 Owner's Manual

Leadscrew End-Play
Adjustment
After a long period of time, you may find that the
leadscrew develops a bit of end play. This lathe
is designed so that play can be removed with a
simple adjustment.
Items Needed
Hex Wrench 3mm .............................................. 1
Wrench 24mm ................................................... 1
NLGI#2 Grease ................................. As Needed
To remove leadscrew end-play:
1.
DISCONNECT MACHINE FROM POWER.
2.
Back out leadscrew set screw approximately
five turns (see Figure 126).
3.
Un-thread leadscrew
(see Figure 126), and slide bearing cover off
end of leadscrew.
Leadscrew
Leadscrew
Figure 126. Leadscrew end-play bearings.
4.
Clean bearings with minerals spirits, then
dry and repack them with NLGI#2 grease.
Re-install bearing cover.
5.
With your left hand, pull leadscrew toward
tailstock, and thread leadscrew flange bolt
back on until it is finger tight and no leadscrew
end-play exists.
6.
Hold leadscrew flange bolt with 24mm
wrench, and tighten set screw until it is snug
at bottom of its bore.
-76-
Qty
flange bolt
Flange
Bolt
Bearing
Set Screw
Cover

Gib Adjustment

The goal of adjusting the gib screws is to remove
sloppiness or "play" from the ways without over-
adjusting them to the point where they become
stiff and difficult to move.
In general, loose gibs cause poor finishes and
tool chatter; however, over-tightened gibs cause
premature wear and make it difficult to turn the
handwheels.
The cross-slide and compound slide on this lathe
each use a long steel wedge called a gib that is
positioned between the component and its dove-
tailed-ways. At the end of each gib is a gib screw,
which moves and holds the gib. Depending upon
which direction the gib moves, the space between
the sliding ways increases or decreases to control
the rigidity of the cross slide and compound slide.
Before adjusting the gibs, loosen the locks for
the device so that the gibs can freely slide during
adjustment, then lubricate the ways.
The gib adjustment process usually requires
some trial-and-error. Repeat the adjustment pro-
cess as necessary until you find the best balance
between loose and stiff movement. Most machin-
ists find that the ideal gib adjustment is one where
a small amount of drag or resistance is present,
yet the handwheels are still easy to move.
Model G0824 (Mfd. Since 12/16)