Grizzly g0748, g0747 owner manual Cross Leadscrew Backlash

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).

Y-Axis

Leadscrew

Figure 66. Ball handle, ring, and key removed

from 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.

Bearing

Housing

Figure 67. Y-axis bearing housing.

Model G0747/G0748 (Mfg. Since 8/12)

5.Loosen the two cap screws on the face of the leadscrew nut shown in Figure 68.

Y-Axis Leadscrew Nut

& Cap Screws

Figure 68. Y-axis leadscrew nut and 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.

-53-