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Model G0747/G0748 (Mfg. Since 8/12)
Figure 31. Model G0747 spindle switch.
6. Loosen the two motor lock levers, one on
each side of the head, then pull the belt ten-
sion adjustment lever forward to release the
V-belt tension.
7. Refer to the illustrations in Figure 30, and
position the V-belt on the pulleys for the
desired spindle speed.
Motor
Spindle
Spindle
Motor
Spindle Switch @
FLOW/RLOW
Low Spindle Speed Range
High Spindle Speed Range
Spindle
Switch @
FHI/RHI
Motor
Spindle
Spindle
Motor
Spindle Switch @
FLOW/RLOW
Spindle
Switch @
FHI/RHI
80
135
210
325
650
160
270
420
660
1115
1750
2720
1320
2230
3500
5440
Figure 30. Model G0747 V-belt positions.
Note: As displayed in Figure 30, the Model
G0747 has two spindle speeds for each
V-belt position depending on the spindle
switch setting.
8. To re-tension the V-belt, push the adjustment
lever backward with moderate force, then
re-tighten the two lock levers to secure the
motor.
9. Replace the two belt housing side covers
before re-connecting the mill to power.
To avoid entanglement hazards, always
ensure belt housing safety covers are firmly
in place before connecting the mill to power.
10. Use the chart below to find the spindle speed
range that includes the required spindle
speed for your operation and set the spindle
switch (Figure 31) accordingly.
Model G0747 Spindle Speed Ranges
Low Range
w/Switch @ FLOW/RLOW
80–325 RPM
Low Range
w/Switch @ FHI/RHI
160– 650 RPM
High Range
w/Switch @ FLOW/RLOW
660–2720 RPM
High Range
w/Switch @ FHI/RHI
1320–5440 RPM