Grizzly Vertical Milling Machines G0728 - Manual (Page 39)

Model G0728–31 (Mfg. Since 11/11)
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Adjusting backlash
leadscrew backlash is the amount of motion the
leadscrew rotates before the device begins to
move. leadscrews always have a certain amount
of backlash which increases with wear. generally,
0.005"–0.010" of backlash is an acceptable range.
the backlash of the longitudinal and cross
leadscrew is adjusted by changing the gap in the
leadscrew nuts (see
figures 51–52).
use a 5mm hex wrench to tighten or loosen
the cap screws on the leadscrew nuts shown in
figures 51–52, then test the amount of backlash
by slowly rocking the handwheels back-and-forth.
figure 52. Cross leadscrew nut.
Gap
Gap
Cap
Screws
Cap
Screw
Cross
leadscrew nut
figure 51. longitudinal leadscrew nut.
longitudinal
leadscrew nut
Gap
Gap
Cap
Screws
Cap
Screw