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Gemstones, Minerals & Fossils
Lapidary
Looking for a pic pre 1970 4in1 Gemmasta
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<blockquote data-quote="joe" data-source="post: 624774" data-attributes="member: 175"><p>Handy tip Mike. Thanks</p><p></p><p>Motor pulley = 71mm</p><p>Shaft pulley = 53mm</p><p></p><p>71/53= 1.34 (ratio 1:1.34)</p><p></p><p>1.34x1425rpm =1909rpm at the shaft</p><p></p><p>Recommend rpm on the wheels is 1600rpm</p><p></p><p>300rpm over recommendation hmm.</p></blockquote><p></p>
[QUOTE="joe, post: 624774, member: 175"] Handy tip Mike. Thanks Motor pulley = 71mm Shaft pulley = 53mm 71/53= 1.34 (ratio 1:1.34) 1.34x1425rpm =1909rpm at the shaft Recommend rpm on the wheels is 1600rpm 300rpm over recommendation hmm. [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Looking for a pic pre 1970 4in1 Gemmasta
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