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Gemstones, Minerals & Fossils
Lapidary
Looking for a pic pre 1970 4in1 Gemmasta
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<blockquote data-quote="Mike678" data-source="post: 624771" data-attributes="member: 16778"><p>You should check the speed rating on your grinding wheels . Do not exceed that or they could shatter . </p><p></p><p>The speed can be calculated by knowing the size of the pulleys . If the motor pulley is 4 inch and the shaft pulley is 2 inch then that is a ratio of 2 to 1 . So it is going to now spin at 2 X 1425 = 2850 R.P.M. Just be careful about increasing the speed .</p><p></p><p> Make sure the frame is earthed , clean the paint off and make a good clean metal to metal contact . Water and electricity do not mix . Has the power point or your house got an R.C.D. fitted ?</p></blockquote><p></p>
[QUOTE="Mike678, post: 624771, member: 16778"] You should check the speed rating on your grinding wheels . Do not exceed that or they could shatter . The speed can be calculated by knowing the size of the pulleys . If the motor pulley is 4 inch and the shaft pulley is 2 inch then that is a ratio of 2 to 1 . So it is going to now spin at 2 X 1425 = 2850 R.P.M. Just be careful about increasing the speed . Make sure the frame is earthed , clean the paint off and make a good clean metal to metal contact . Water and electricity do not mix . Has the power point or your house got an R.C.D. fitted ? [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Looking for a pic pre 1970 4in1 Gemmasta
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