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G8621 Heavy-Duty Sliding Table Shaper -19-
Speed Changes
The Model G8621 Shaper is equipped with a V-
belt drive system that controls the speeds. To
change spindle speeds:
1. Unplug the machine.
2. Loosen the two motor plate bolts, and slide
the motor toward the spindle assembly. DO
NOT take the bolts out.
3. Select the desired speed. There are four
speeds: 3600 R.P.M., 5100 R.P.M., 8000
R.P.M., 10,000 R.P.M. Figure 26 shows the
belt positions for each available speed.
4. Align the belt along the appropriate pulley
grooves.
5. Slide the motor back into position and tight-
en the belt. When the belt is properly ten-
sioned, there should be approximately
1
⁄4" of
deflection in the center of the belt when you
press it with moderate pressure.
6. Tighten all the adjusting bolts.
7. Spin the pulley to ensure proper tracking.
V-Belt Tension
You should be able to deflect the belt
1
⁄4" with
moderate finger pressure. This may seem tight
compared to most other V-belts, but since the belt
is small and runs fast, this amount of tension is
necessary. The V-belt will slip if too loose, and
will squeal or cause vibration if too tight. Adjust
the tension if necessary. To adjust V-belt tension:
1. Make sure the pulleys are properly aligned.
2. Loosen the two motor mount plate bolts and
slide the motor left or right to modify the belt
tension. Keep the pulleys aligned.
3. Tighten the motor mount plate bolts, test the
tension, and check the pulleys.
4. Repeat steps 2-3 until tension is correct and
the pulleys are aligned.
Disconnect power to the
machine when perform-
ing any adjustments or
maintenance. Failure to
do this may result in seri-
ous personal injury.
Figure 26. Spindle speed adjustment.