birdbandertom
off to a rocking start
Member since March 2021
Posts: 2
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Post by birdbandertom on Apr 16, 2022 18:54:49 GMT -5
Just finished a homemade tumbler. I'm using a 1/8 HP geared motor that runs at 80 rpm. Motor has 5/8" shaft with a 1 3/4" pulley attached. Barrel shafts are 3/4" stainless steel running on pillow bearings. Only one shift is driven using another 1 3/4" pulley. Shafts are covered plastic tubing. Everything looked good till I put my 12# barrel on the shafts. It won't stay. The barrel crawls right off the shafts. I tried increasing the gap between the shafts to create more of a pocket - didn't help. I then narrowed the gap between shafts and was able to get the barrel to stay on the shafts but the barrel was only turning at about 12 rpm. I increased the pulley size on the driven shaft to 3". Got more speed but the barrel will not stay in place. ANY suggestions? Do I need to have both shafts driven? What should the gap between shafts be?
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,352
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Post by quartz on Apr 16, 2022 22:04:08 GMT -5
Both shafts driven always works well for non-slip function of the machine. I've built I guess a dozen tumblers complete now, rod spacing at 2/3 the barrel diameter works for me. Make sure your shafts are the same spacing at both ends.
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birdbandertom
off to a rocking start
Member since March 2021
Posts: 2
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Post by birdbandertom on Apr 20, 2022 18:39:12 GMT -5
Thanks for your response Cave Dweller. I now have both shafts driven. The tumbling machine is now fine tuned and running beautifully.
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Post by stonemon on Apr 20, 2022 19:21:07 GMT -5
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