Half Nut Adjustment
The clamping pressure of the half nut is fully adjustable with a gib that can be loosened or tight- ened by two set screws. Use this procedure to adjust the half nut if it becomes loose from wear, or it is too tight for your preferences. A half nut that is too loose will make it difficult to produce accu- rate work. A half nut that is too tight will increase the rate of wear on itself and the leadscrew.
Tool Needed: | Qty |
Hex Wrench 3mm | 1 |
To adjust the half nut: |
|
1.DISCONNECT LATHE FROM POWER!
2.Disengage the half nut, then remove the thread dial.
3.turn the two set screws (see Figure 121) clockwise to tighten the half nut and counter- clockwise to loosen it. Make sure to turn the set screws in even amounts so that one end of the gib does not become tighter than the other.
Set
Screws
Figure 121. Half nut gib adjustment.
4.Engage/disengage the half nut several times and notice how it feels. the half nut is cor- rectly adjusted when it has a slight drag while opening and closing. The movement should not be too stiff or too sloppy.
5.repeat Steps 3–4, if necessary, until you are satisfied with the half nut pressure.
6.re-install the thread dial.
Model G0740 (Mfg. Since 11/12)
V-Belts
Tools Needed: | Qty |
Phillips Screwdriver #2 | 1 |
Open End Wrench 24mm | 1 |
To adjust the |
|
1.DISCONNECT LATHE FROM POWER!
2.remove the end gear cover, the motor access panel, and the rear access panel to expose the
End Gear Cover
Motor Access
Panel
Rear Access
Panel
