Grizzly G8621 instruction manual Belt Tension Speed Changes

V-Belt Tension Speed Changes

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 2-3until 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.

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.

Figure 26. Spindle speed adjustment.

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.

G8621 Heavy-Duty Sliding Table Shaper -19-