Southbend SB1263 Gib Adjustment, Internal Gib, External Gib, I N S T R U C T I O N S

Mfg. Since 9/11 I N S T R U C T I O N S Model SB1263

Gib Adjustment

The goal of adjusting the gib screws is to remove sloppiness or “play” from the ways without over- adjusting them to the point where they become stiff and difficult to move.

In general, loose gibs cause poor finishes and inaccurate tapers; however, over-tightened gibs cause premature wear and make it difficult to move the carriage and cross slide.

Internal Gib

The internal gib is tapered and held in position by a screw at each end (see Figure 29). To adjust this gib, turn one screw 1⁄4 turn clockwise and the other screw 1⁄4 turn counterclockwise, so both screws move in the same direction and the same amount. Test the feel of the setting by moving the carriage, and adjust the gib screws as necessary to make it tighter or looser.

Gib

Gib Screw

(1 of 2)

Figure 29. Internal gib.

External Gib

The external gib is wedge-shaped and is held in position by three set screws (see Figure 30). To adjust this gib, loosen the hex nuts and turn the set screws in equal amounts. Test the feel of the setting by moving the carriage, and adjust the set screws as necessary to make it tighter or looser. When satisfied with the movement, re- tighten the hex nuts to secure the setting.

Gib	Hex Nuts
	& Set Screws
Figure 30. External gib.

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