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Rifles, Reloading, Optics, Equipment
Gunsmithing
Shear grinding Lathe tools
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<blockquote data-quote="Gord0" data-source="post: 1471556" data-attributes="member: 99696"><p>Not a gunsmith, just a machinist that has been turning handles for a little over 20yrs. I program cnc, but still use manual equipment every week. I can tell you that a lot of the info you hear about carbide, and a lot of things said in this thread are only partially true. Cheap carbide, the wrong grade, wrong profile. All those things can cause carbide to need to smear material off instead of actually cutting it. Get the right tooling and itlit do wonders. Widia has application engineers that will work with you, sandvik does too. Those are probably two of the better lathe tooling suppliers. Call or email them and they'll help you out.</p><p></p><p>I can tell you from watching that video on shear cutting that it will put an enormous amount of stress into the very top layer of steel on the barrel. I cut very thin walled parts out of aluminum every day. As in down to .02" wall thickness. Some 8"x10" .08" floor thickness parts that have flatness call outs of .002". You need to have sharp tooling (which you can get with carbide) and your surface speed needs to be correct. Too fast and material smears, too slow and it tears. Both leaving residual stress in the surface.</p></blockquote><p></p>
[QUOTE="Gord0, post: 1471556, member: 99696"] Not a gunsmith, just a machinist that has been turning handles for a little over 20yrs. I program cnc, but still use manual equipment every week. I can tell you that a lot of the info you hear about carbide, and a lot of things said in this thread are only partially true. Cheap carbide, the wrong grade, wrong profile. All those things can cause carbide to need to smear material off instead of actually cutting it. Get the right tooling and itlit do wonders. Widia has application engineers that will work with you, sandvik does too. Those are probably two of the better lathe tooling suppliers. Call or email them and they'll help you out. I can tell you from watching that video on shear cutting that it will put an enormous amount of stress into the very top layer of steel on the barrel. I cut very thin walled parts out of aluminum every day. As in down to .02" wall thickness. Some 8"x10" .08" floor thickness parts that have flatness call outs of .002". You need to have sharp tooling (which you can get with carbide) and your surface speed needs to be correct. Too fast and material smears, too slow and it tears. Both leaving residual stress in the surface. [/QUOTE]
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Shear grinding Lathe tools
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