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The Range
Handgun Discussion
Notes from an Army comp shooter for an accurate 1911 (early 1970’s)
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<blockquote data-quote="BillM" data-source="post: 4040274" data-attributes="member: 45785"><p>No personal experience here, but the good word from a gentleman who restores antique machinery, and swears by TimeSaver Lapping compounds. <a href="https://ws2coating.com/timesaver-lapping-compounds/" target="_blank">Timesaver Lapping Compounds - Micro Surface Corporation</a> </p><p></p><p>SDS for the hard metal lapping compound is here: <a href="https://ws2coating.com/wp-content/uploads/2019/05/SDS-GREEN-LABEL-TIMESAVER-ENGLISH-0815.pdf" target="_blank">https://ws2coating.com/wp-content/uploads/2019/05/SDS-GREEN-LABEL-TIMESAVER-ENGLISH-0815.pdf</a> It breaks down and washes out, unlike silicon carbide, aluminum oxide, etc. Main ingredient is find silica, or quartz. What I do know from personal experience is that quartz is about the same hardness as hardened steel. And it fractures easily. IIRC, quartz is silicon dioxide, and garnet is (depending on type) silicon trioxide or tetraoxide with traces of other metals. Silicon dioxide is about a 7 on the Moh's scale, garnets range from about 6-7.5, and silicon carbide is about a 9, as is corundum, or aluminum oxide. The harder materials will embed in a softer material. That is, after all, how laps are made.</p></blockquote><p></p>
[QUOTE="BillM, post: 4040274, member: 45785"] No personal experience here, but the good word from a gentleman who restores antique machinery, and swears by TimeSaver Lapping compounds. [URL="https://ws2coating.com/timesaver-lapping-compounds/"]Timesaver Lapping Compounds - Micro Surface Corporation[/URL] SDS for the hard metal lapping compound is here: [URL]https://ws2coating.com/wp-content/uploads/2019/05/SDS-GREEN-LABEL-TIMESAVER-ENGLISH-0815.pdf[/URL] It breaks down and washes out, unlike silicon carbide, aluminum oxide, etc. Main ingredient is find silica, or quartz. What I do know from personal experience is that quartz is about the same hardness as hardened steel. And it fractures easily. IIRC, quartz is silicon dioxide, and garnet is (depending on type) silicon trioxide or tetraoxide with traces of other metals. Silicon dioxide is about a 7 on the Moh's scale, garnets range from about 6-7.5, and silicon carbide is about a 9, as is corundum, or aluminum oxide. The harder materials will embed in a softer material. That is, after all, how laps are made. [/QUOTE]
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The Range
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Notes from an Army comp shooter for an accurate 1911 (early 1970’s)
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