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Gemstones, Minerals & Fossils
Lapidary
old gem master
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<blockquote data-quote="rough2cut" data-source="post: 103490" data-attributes="member: 3816"><p>The reason you dont need a reverse is that the spindle plate has a left hand thread. Run it the other way and your laps come loose.</p><p>a sewing machine motor is noisy and under powered. I use a 3 phase motor with a single to three phase inverter. Motor is about $150</p><p>and the inverter about $300 plus a external on/off, reverse and variable speed dial. Cheaper than $4000 for a new GF4.</p><p>That about all I can do for you. I given all the options I know and having owned ,restored and used Gemmastas for 36 years I know every nut and bolt on them.</p><p></p><p>Regards Tony</p></blockquote><p></p>
[QUOTE="rough2cut, post: 103490, member: 3816"] The reason you dont need a reverse is that the spindle plate has a left hand thread. Run it the other way and your laps come loose. a sewing machine motor is noisy and under powered. I use a 3 phase motor with a single to three phase inverter. Motor is about $150 and the inverter about $300 plus a external on/off, reverse and variable speed dial. Cheaper than $4000 for a new GF4. That about all I can do for you. I given all the options I know and having owned ,restored and used Gemmastas for 36 years I know every nut and bolt on them. Regards Tony [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
old gem master
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