I bought a rotary tumbler for Harbor&Frieght. The motor is nice and
simple, less parts less headaches, like a big version of the mini slot
cars of olde’
Needless to say that after a while the band breaks. This is nothing
new of course so I remembered that in early factories the belts
weren’t rubber at all but leather.
I took a leather shoe string from an old work boot and cut it to the
size of the rubber band. Instead of using thread I used dental floss,
which will not break at all I tried, cut the ends of the string
together at 45 degree angles so it will lie flat. Put it on the
wheels, adjusted the tension and it worked. To test it I loaded the
barrel to the 3lb. maximum and it worked. So far it’s been running
none stop for 5 hours but hasn’t snapped or stretched yet. The rubber
band snapped at 1.5lbs 60 minutes in.
I think the motor will burn out way before the leather drive belt
wears out. Even so all the money I am saving on bands can go to a new
motor or a new tumbler since it was only $29.00.
My next experiment will be to make gears for it and eliminate the
belt all together. Thinking about making reduction gears so the motor
doesn’t work as hard to achieve the same or faster barrel rotation.
Note if you notice any spelling errors I take creative license because it’s