CHANGING GEARS
Changing gears on the Model B is straight forward. Refer to the label found inside of the
Lower Belt
Guard
for proper gear selection while following the example below. We will be changing the gears to
those that would be used to set the machine for a 0.002” per revolution feed rate. These instructions
assume that all of the gears need to be changed. The number of teeth are stamped on each gear. To begin:
1. Unplug the machine.
2.
Remove the nuts on the end of the shafts for gears A and D.
Figure 41
. Swing gears in lower position.
3.
Loosen the cap screw at the bottom of the gear support arm and allow the arm to rotate downward as in
Figure 41.
4.
Remove the cap screw in the middle of the combination gear B/C. This will allow removal of the gears
and bushing supporting them. A teenut will remain in the gear support arm as in
Figure 42
.
Figure 42
. Gear support arm with teenut.
5.
Remove gears A and D.
6.
Replace the gears in positions A and D with 24 and 120 tooth gears, respectively.
7.
Insert the bushing into the 60/100 tooth combination gear from the side that has 60 teeth. Align the flats
of the bushing to the slot in the gear support arm and loosely fasten the assembly to the teenut using the
Chester UK Model B
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