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Gold Prospecting
Hard Rock Gold Prospecting
Home sampling finally started
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<blockquote data-quote="thedigger" data-source="post: 126307" data-attributes="member: 2037"><p>Hi Bill</p><p> I would say your speeds seem to be a bit excessive.</p><p></p><p>"suggest that the optimum diameter for a mill for small scale mining, is 9" diameter. The tip speed of the rotor should be close to 3400 feet per second, which is about the same velocity as a lawn mower at full revs"</p><p></p><p><a href="http://medcenterblog.uvmhealth.org/wp-content/uploads/2013/06/letter.pdf" target="_blank">http://medcenterblog.uvmhealth.org/wp-content/uploads/2013/06/letter.pdf</a></p><p></p><p>From a old sparky</p><p></p><p>Frank</p></blockquote><p></p>
[QUOTE="thedigger, post: 126307, member: 2037"] Hi Bill I would say your speeds seem to be a bit excessive. "suggest that the optimum diameter for a mill for small scale mining, is 9" diameter. The tip speed of the rotor should be close to 3400 feet per second, which is about the same velocity as a lawn mower at full revs" [url]http://medcenterblog.uvmhealth.org/wp-content/uploads/2013/06/letter.pdf[/url] From a old sparky Frank [/QUOTE]
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Gold Prospecting
Hard Rock Gold Prospecting
Home sampling finally started
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