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Old 08-30-2019, 08:01 PM   #1
FAKKY
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Join Date: Sep 2016
Location: Redington Beach
Posts: 1,317
Rock Tumbler DIY -reduce RPM

Wife wans a rock tumbler (larger).

I have one of these I dont use much.

https://www.harborfreight.com/power-...fer-61557.html

Half inch arbor.
3450 RPM

I need to drop that down to around 30 rpm.

How do I work out the pulley sizes Im likely to need.

Similar to this setup.

Name:  tumbler.jpg
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Size:  42.1 KB
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