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Gemstones, Minerals & Fossils
Gemstones and Minerals
Faceting machine talk and ideas
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<blockquote data-quote="rough2cut" data-source="post: 121272" data-attributes="member: 3816"><p>I never score copper laps. They are usually half hard plate or bar stock. this means a diamond particle wont embed as deep as in an annealed lap. So scoring the lap will ad to grinding but will affect the finish greatly. I also don't score laps I instead knurl them using a straight medium hand held knurling tool. This action raise the surface of the lap without any metal being removed and creates thousands of small impressions for your diamond and lubricant to sit, feeding the facet as it passes overhead.</p><p>I do now manufacture a special copper lap for Gemcuts using sintered copper with a built in lubricant. This means the copper is slightly porous annealed and the built in lubricant allows the facet to glide smoothly over the lap. Its gives an aggressive but far supierior finish to any other copper lap at a similar price. Pre=polish is all about the best finish and this lap ticks all the boxes.</p><p></p><p><a href="http://gemcutters.blogspot.com.au/" target="_blank">http://gemcutters.blogspot.com.au/</a></p></blockquote><p></p>
[QUOTE="rough2cut, post: 121272, member: 3816"] I never score copper laps. They are usually half hard plate or bar stock. this means a diamond particle wont embed as deep as in an annealed lap. So scoring the lap will ad to grinding but will affect the finish greatly. I also don't score laps I instead knurl them using a straight medium hand held knurling tool. This action raise the surface of the lap without any metal being removed and creates thousands of small impressions for your diamond and lubricant to sit, feeding the facet as it passes overhead. I do now manufacture a special copper lap for Gemcuts using sintered copper with a built in lubricant. This means the copper is slightly porous annealed and the built in lubricant allows the facet to glide smoothly over the lap. Its gives an aggressive but far supierior finish to any other copper lap at a similar price. Pre=polish is all about the best finish and this lap ticks all the boxes. [url]http://gemcutters.blogspot.com.au/[/url] [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Faceting machine talk and ideas
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