Southbend SB1027 owner manual Longitudinal Leadscrew Backlash, Cross Leadscrew Backlash

Model SB1027 S E R V I C E For Machines Mfg. Since 8/09

Longitudinal Leadscrew Backlash

1.DISCONNECT MILL FROM POWER!

2.Loosen the two cap screws on the leadscrew nut accessed from underneath the left side of the table, as shown in Figure 61.

Leadscrew Nut (1 of 2)

& Cap Screw

Figure 61. Longitudinal leadscrew nut and cap screw, as viewed from underneath the left side of the table.

3.Use the T-handle hex wrench or similar tool to rotate the adjustment plate on the leadscrew nut in small increments, then rotate the X-axis ball handle to check the amount of backlash.

4.When you are satisfied with the adjustment, re-tighten the two cap screws.

Cross Leadscrew Backlash
Tools Needed	Qty
T-Handle Hex Wrench 5mm	1
Hex Wrench 8mm	1
Wrench 19mm	1

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 62.

Cross Leadscrew

Figure 62. 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 63).

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

Bearing

Housing

Figure 63. Removing the bearing housing from the

cross leadscrew.

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