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Model G0747/G0748 (Mfg. Since 8/12)
Adjusting Leadscrew
Backlash
Leadscrew backlash is the amount of motion the
leadscrew rotates before the attached device
begins to move.
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 back-
lash, 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
3. Rotate the adjustment plate on the leadscrew
nut in small increments, then check the
amount of backlash.
4. When you are satisfied with the adjustment,
re-tighten the two cap screws.
X-Axis Leadscrew Backlash
1. DISCONNECT MILL FROM POWER!
2. Loosen the two cap screws on the X-axis
leadscrew nut accessed from underneath the
left side of the table (see Figure 65).
Figure 65. X-axis leadscrew nut cap screws
(viewed from underneath left side of table).
Cap Screws