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Rifles, Reloading, Optics, Equipment
Gunsmithing
Shear grinding Lathe tools
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<blockquote data-quote="Trickymissfit" data-source="post: 1470427" data-attributes="member: 25383"><p>surface finish is usually better with a radius on the tip. .025" R. is plenty, but the radius also causes stress in the metal that will bite you later. Carbide like to be "plowed" at a petty good surface speed, and this is where high speed shines. </p><p></p><p>An old man once told me that if the finish is bright and shiny after the cut; you'll be fighting it from then on. It took me a couple years to figure out what he was talking about, but boy was he right! </p><p></p><p>I've had pretty good luck with diamond inserts, and ceramic to a certain extent. The real issue is that a hand lathe and inserts are not made for each other.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 1470427, member: 25383"] surface finish is usually better with a radius on the tip. .025" R. is plenty, but the radius also causes stress in the metal that will bite you later. Carbide like to be "plowed" at a petty good surface speed, and this is where high speed shines. An old man once told me that if the finish is bright and shiny after the cut; you'll be fighting it from then on. It took me a couple years to figure out what he was talking about, but boy was he right! I've had pretty good luck with diamond inserts, and ceramic to a certain extent. The real issue is that a hand lathe and inserts are not made for each other. gary [/QUOTE]
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