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Model G0747/G0748 (Mfg. Since 8/12)
-53-
Cross Leadscrew Backlash
1. DISCONNECT MILL FROM POWER!
2. Remove the hex nut and ball handle from the
Y-axis leadscrew.
Note: In the next step, take care not to mis-
place the leadscrew key as you remove the
parts.
3. Unthread and remove the knurled retaining
ring, graduated dial ring, and the leadscrew
key (see Figure 66).
Figure 66. Ball handle, ring, and key removed
from Y-axis leadscrew.
Y-Axis
Leadscrew
4. Remove the four cap screws from the bearing
housing, then slide it off the leadscrew (see
Figure 67).
Note: It may be necessary to use a dead
blow hammer or rubber mallet on the housing
to knock it loose.
Figure 67. Y-axis bearing housing.
Bearing
Housing
5. Loosen the two cap screws on the face of the
leadscrew nut shown in Figure 68.
Figure 68. Y-axis leadscrew nut and cap screws.
Y-Axis Leadscrew Nut
& Cap Screws
6. Re-install the key back onto the leadscrew so
that you can use the ball handle in the next
step.
7. Rotate the adjustment plate on the leadscrew
nut in small increments, slide the ball handle
on the leadscrew, then check the amount of
backlash.
8. When you are satisfied with the adjustment,
re-tighten the two cap screws.
9. Re-install the parts previously removed in the
reverse order.