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Rifles, Reloading, Optics, Equipment
Gunsmithing
Bolt face diameter's
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<blockquote data-quote="J E Custom" data-source="post: 1827974" data-attributes="member: 2736"><p>I normally have to machine the lugs and the lug abutments to get them true, and then I use 800 and 1000 grit garnet lapping compound to bring the machine finish to a very smooth finish to minimize friction that could increase bolt lift. </p><p></p><p>Here is an inexpensive tool for this process.</p><p> <a href="https://www.brownells.com/gunsmith-tools-supplies/rifle-tools/bolt-tools/bolt-lapping-tools/bolt-lapping-tools-prod414.aspx" target="_blank">https://www.brownells.com/gunsmith-tools-supplies/rifle-tools/bolt-tools/bolt-lapping-tools/bolt-lapping-tools-prod414.aspx</a></p><p></p><p>If you have 80+% engagement in the lug surfaces, then a good 600 grit garnet will bring them to near 100% and then finish up with a 800 or 1000 grit to polish.</p><p></p><p>In my opinion, lapping the lugs should be done to increase the contact area and improve the finish, not to true them up.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1827974, member: 2736"] I normally have to machine the lugs and the lug abutments to get them true, and then I use 800 and 1000 grit garnet lapping compound to bring the machine finish to a very smooth finish to minimize friction that could increase bolt lift. Here is an inexpensive tool for this process. [URL]https://www.brownells.com/gunsmith-tools-supplies/rifle-tools/bolt-tools/bolt-lapping-tools/bolt-lapping-tools-prod414.aspx[/URL] If you have 80+% engagement in the lug surfaces, then a good 600 grit garnet will bring them to near 100% and then finish up with a 800 or 1000 grit to polish. In my opinion, lapping the lugs should be done to increase the contact area and improve the finish, not to true them up. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Bolt face diameter's
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