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Rifles, Reloading, Optics, Equipment
Gunsmithing
Building a barrel vise
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<blockquote data-quote="MNbogboy" data-source="post: 1808676" data-attributes="member: 18849"><p>Birdiemc got it right.</p><p>1. Measure 2 diameters at 10" apart</p><p>2 . Subtract smaller diameter from larger diameter.</p><p>2. Divide the difference by 2.</p><p>3. Divide that number by 10</p><p>4. Above gives taper per inch.</p><p>The "inverse sin" on calculator of the taper per inch will give the angle.</p><p></p><p>Example: 1.06 ( large diameter )</p><p> - .75 (small diameter)</p><p> = .31 (difference)</p><p> ÷ 2</p><p> = .155 (actual taper from c-line)</p><p> ÷ 10 (distance between dia's)</p><p> = .0155 (actual taper in 1 inch)</p><p></p><p> ASin(.0155) = .888....degrees</p><p>Hope this helps.</p></blockquote><p></p>
[QUOTE="MNbogboy, post: 1808676, member: 18849"] Birdiemc got it right. 1. Measure 2 diameters at 10" apart 2 . Subtract smaller diameter from larger diameter. 2. Divide the difference by 2. 3. Divide that number by 10 4. Above gives taper per inch. The "inverse sin" on calculator of the taper per inch will give the angle. Example: 1.06 ( large diameter ) - .75 (small diameter) = .31 (difference) ÷ 2 = .155 (actual taper from c-line) ÷ 10 (distance between dia's) = .0155 (actual taper in 1 inch) ASin(.0155) = .888....degrees Hope this helps. [/QUOTE]
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Building a barrel vise
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