Changing Speeds - Grizzly G0516 Owner's Manual

Changing Speeds

The Model G0516 features 6 speeds—150, 240,
490, 750, 1200 & 2400 RPM. These speeds can
be changed by positioning the V-belt in different
sheaves on the drive pulleys, as illustrated in the
speed change chart on the machine label or in
Figure 48.
Figure 48. Speed change chart.
To change the belt position on the pulleys:
1. Disconnect the lathe/mill from the power
source!
2.
Remove the drive belt cover.
3. Loosen the bolt on the tensioner bracket
(shown in Figure 49) with a 19mm wrench.
Figure 49. Tensioner adjustment bolt.
G0516 Lathe/Mill
4.
Move the pulley bracket away from the belt.
5. Position the belt into the pulley sheaves that
dictate the speed required for your opera-
tion.
6. Move the pulley bracket into the belt and ten-
sion it until there is about
the side of the belt that is opposite of where
the tensioner is making contact. Figure 50
shows how to check for proper tension by
using a ruler and your thumb. Note—only
moderate pressure is needed to check belt
tension!
Figure 50. Checking for proper V-belt tension.
7.
Replace the drive belt cover.
Some threading operations may damage
the lead screw if performed at high speeds.
Always use the slowest speed possible for
your particular operation!
⁄ " deflection on
1
2
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