-84-
Model G0824 (Mfd. Since 12/16)
8. Place a dial indicator on cross slide and move
carriage toward headstock until contact point
of indicator touches spindle face, as shown in
Figure 143.
10. Insert chuck key into a cam socket to prevent
spindle from turning, then tighten inner span-
ner nut until dial indicator needle just stops
moving (see
Figure 144).
Note: For convenience and accuracy, we
recommend having another person watch the
dial while you tighten the inner spanner nut.
Figure 144. Adjusting spindle bearings.
7. Place a wooden block over outboard end of
spindle, tap it a few times with a small sledge
or heavy dead blow hammer (see
Figure 142).
Your goal is to slide the spindle forward just
enough to introduce spindle end-play that
you can feel by hand.
Figure 142. Introducing detectable end-play.
Figure 143. Example of dial indicator setup.
9. Move carriage an additional 0.100" toward
headstock.
While tightening the inner spanner nut,
rock the spindle back and forth slightly with
the chuck key to make sure the spindle
tapered roller bearings seat properly in their
races.
When the dial indicator needle stops mov-
ing, there will be no spindle end-play and no
bearing preload. It is important that you find
this point without tightening the spanner nut
too much and inadvertently preloading the
spindle bearings.
If you think you have gone past the zero end-
play point, unload the bearings by repeating
Steps 7–8, then re-tighten the inner spanner
nut until it has reached the zero end-play
position.
