Southbend SB1059F ユーザーズマニュアル

For Machines Mfg. Since 3/11

EVS Toolroom Lathe w/DRO

-79-

After a long period of time, you may find that the 
leadscrew develops a small amount of end play. 
This lathe is designed so that leadscrew end play 
can be removed with an easy adjustment.

Open End Wrench 36mm or 1 

7

⁄

16

" ........................ 1

Hex Wrench 3mm ................................................. 1

  DISCONNECT LATHE FROM POWER!

  Loosen both retaining nut set screws (see 

Figure 116).

  Engage the half nut lever.

  Rotate the carriage handwheel back slightly 

and tighten the retaining nut at the same 
time until the end play is removed.

  Tighten both set screws to secure the setting.

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 
tool chatter; however, over-tightened gibs cause 
premature wear and make it difficult to turn the 
handwheels.

Before adjusting the gibs, loosen the 

locks for the device so that the gibs can freely 
slide during adjustment, then lubricate the ways.

The gibs are tapered and held in position by a 
screw at each end. To adjust the 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 sliding component by turning 
the handwheel, and adjust the gib screws as 
necessary to make it tighter or looser.

The gib adjustment process usually requires 
some trial-and-error. Repeat the adjustment 
process as necessary until you find the best 
balance between loose and stiff movement. Most 
machinists find that the ideal gib adjustment is 
one where a small amount of drag or resistance 
is present, yet the handwheels are still easy to 
move.