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Rifles, Reloading, Optics, Equipment
Gunsmithing
Single point threading in reverse
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<blockquote data-quote="nvbowhunter" data-source="post: 1626351" data-attributes="member: 49377"><p>Birdiemc,</p><p>I too thread just has Joe instructs in his video. I use this method for both external and internal threads. When cutting threads on a barrel tenon I use my compound to make a plunge in initially to my targeted pitch diameter. Pitch diameter can be verified using just 2 wires as you're measuring a single groove. Once this relief cut is made and pitch diameter target # confirmed you're good to go as in normal threading (but with chuck running in reverse). I use a 5/8 RH threading bar that is for external threads on one end and internal on the opposite. You have to swap the carbide inserts from the opposite end so you're carbide insert is upside down. This system really is awesome and greatly improves the visibility issues that we have when truing action threads. With this system the tool is running against the far side of the action threads and can be viewed more readily by the lathe operator. A bonus to this method is it allows you to thread at a much faster spindle speed so the carbide performs better. Practice this method on scraps and you'll soon wonder why any of us w/o thread on chucks ever cut threads any other way.</p></blockquote><p></p>
[QUOTE="nvbowhunter, post: 1626351, member: 49377"] Birdiemc, I too thread just has Joe instructs in his video. I use this method for both external and internal threads. When cutting threads on a barrel tenon I use my compound to make a plunge in initially to my targeted pitch diameter. Pitch diameter can be verified using just 2 wires as you're measuring a single groove. Once this relief cut is made and pitch diameter target # confirmed you're good to go as in normal threading (but with chuck running in reverse). I use a 5/8 RH threading bar that is for external threads on one end and internal on the opposite. You have to swap the carbide inserts from the opposite end so you're carbide insert is upside down. This system really is awesome and greatly improves the visibility issues that we have when truing action threads. With this system the tool is running against the far side of the action threads and can be viewed more readily by the lathe operator. A bonus to this method is it allows you to thread at a much faster spindle speed so the carbide performs better. Practice this method on scraps and you'll soon wonder why any of us w/o thread on chucks ever cut threads any other way. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Single point threading in reverse
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