Southbend SB1024, SB1026, SB1025 owner manual Cross Leadscrew Backlash

SB1024/SB1025/SB1026 S E R V I C E For Machines Mfg. Since 8/09

Cross Leadscrew Backlash

1.DISCONNECT MILL FROM POWER!

2.Remove the hex nut and ball handle from the cross leadscrew.

Note: In the next step, take care not to misplace the leadscrew key as you remove the parts.

3.Unthread and remove the knurled retaining ring, graduated dial ring, and the leadscrew key, as shown in Figure 65.

Cross Leadscrew

Figure 65. Ball handle, rings, and key removed from

the cross leadscrew.

4.Remove the four cap screws from the bearing housing, then slide it off the leadscrew (see Figure 66).

Note: It may be necessary to use a dead blow hammer or rubber mallet on the housing to knock it loose.

Bearing

Housing

Figure 66. Removing the bearing housing from the

cross leadscrew.

5.Loosen the two cap screws on the face of the leadscrew nut shown in Figure 67.

Cross Leadscrew

Nut & Cap Screws

Figure 67. Cross 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, 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.

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