V-Belt Tensioning - Grizzly G0678 Owner's Manual

Leadscrews
Lubricant
NLGI #2 Grease
Use a shop rag and mineral spirits to clean away
debris and grime from the longitudinal, cross, and
elevation leadscrews and leadscrew nuts. Apply
a thin coat of lubricant to the leadscrews, then
move the table through the full range of move-
ment for each leadscrew to distribute the grease
(see Figures 37–38).
Longitudinal
Leadscrew
Figure 37. Longitudinal leadscrew.
Cross
Leadscrew
Vertical
Leadscrew
Figure 38. Cross and vertical leadscrews.
-28-
Frequency Qty
Every Thin
40 Hours Coat
of Operation

V-Belt Tensioning

Power is transferred from the motor to the spindle
with a V-belt. With normal use, this belt will gradu-
ally stretch over time. When it does, perform the
following procedures to re-tension it.
Tools Needed
Wrench 24mm ................................................... 1
To tension the V-belt:
1. DISCONNECT THE MILL FROM POWER!
2.
Lift the V-belt cover, then loosen the adjust-
ment bolt jam nut near the motor (see
Figure 39).
V-Belt
Figure 39. V-belt tension adjustment bolt.
3.
Rotate the adjustment bolt until the V-belt has
approximately 1" of deflection when moder-
ate pressure is applied midway between the
pulleys (see Figure 40), then re-tighten the
jam nut and close the V-belt cover.
Approximately 1"
Deflection
Figure 40. Checking for belt deflection.
Model G0678 (Mfd. Since 06/15)
Qty
Adjustment
Bolt & Jam
Nut