Southbend SB1027 owner manual Adjusting Leadscrew Backlash

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

Table Gib &

Adjustment Screw

Figure 58. Table gib and adjustment screw

underneath the left side of the table.

Saddle Gib &

Adjustment Screw

Figure 59. Saddle gib and adjustment screw.

Knee Gib &

Adjustment

Screw

Figure 60. Knee gib and adjustment screw.

Adjusting Leadscrew Backlash

Leadscrew backlash is the amount the leadscrew rotates before the attached device begins to move.

Although the mill is equipped with double- bronzed longitudinal and cross leadscrew nuts to minimize backlash, leadscrews will always have a certain amount of backlash that will increase with normal wear.

Generally, 0.005"–0.010" leadscrew backlash is acceptable to ensure smooth movement and reduce the risk of premature thread wear.

However, if you find it necessary to adjust leadscrew backlash, perform the procedures listed below.

Tools Needed	Qty
T-Handle Hex Wrench 5mm.	................................ 1
Hex Wrench 3mm	2
Hex Wrench 8mm	1
Wrench 19mm	1

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